Skocz do pozycji: 1.

Tytuł:

Selection Effects in Rice as Assessed by Genetic Analysis in Segregating Populations

Autorzy:

Ahmadikhah, Asadollah

Powiązania:

https://bibliotekanauki.pl/articles/2199689.pdf

Data publikacji:

2018-12-20

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

heritability,
heterosis.rice
selection

Opis:

Estimation of selection effects on changes of a trait is of vital importance for the success of any plantbreeding program, and helps to select the desirable breeding method. Heritability and genetic advance areimportant selection parameters, and selection success is a reflectance of selection response. To estimate selectioneffects on rice genetic parameters, a research was conducted using 4 different generations (two parents:Neda and Sadri, and two segregating populations: BC1F1 and BC1S1). After development of a backcross population,a single plant (BC1#4) was selected based on its desirable performance, particularly in heading date andseven other morphological traits. BC1F1 population compared to mid-parent performance showed advance forheading date, plant height, tiller number, hundred seed weight, weight of filled seeds per panicle and grainyield per plant, while mean performance of BC1F1 population compared to BC1S1 population showed advanceonly for heading date, plant height, tiller number and grain yield. Prevalence of additive genetic effects incontrolling panicle weight, hundred seed weight, weight of filled seeds per panicle, plant height and headingdate was observed, and in contrast prevalence of non-additive effects in controlling grain yield was observed.High general heritability was observed for most traits, while only heading date and plant height showeda considerable specific heritability (60.7% and 67.5%, respectively), and grain yield showed a relatively lowspecific heritability (37.0%). High expected genetic advance (ΔGe) was obtained for tiller number (49.4%),followed by grain yield (43.5%) and plant height (35.5%), while the highest real genetic advance (ΔGe) wasobtained for heading date (-8.5%) and tiller number (5.4%). High selection success was obtained only forheading date (51.8%). Altogether, the obtained results gave promise for selecting progenies with early maturityand semi-dwarfism in early segregating generations, while they suggested preference of heterosis for improvementof grain yield.

Źródło:

Plant Breeding and Seed Science; 2018, 77; 69-77
1429-3862
2083-599X

Pojawia się w:

Plant Breeding and Seed Science

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:

Genotypic variation for salt tolerance in Moroccan barley landraces at seed germination

Autorzy:

El Madidi, Said
El Baroudi, Brahim
Ban-Aameur, Fouzia

Powiązania:

https://bibliotekanauki.pl/articles/2199035.pdf

Data publikacji:

2006-06-22

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

Barley
germination
heritability
landraces
salt tolerance

Opis:

Experiments were conducted to evaluate the genotypic variation for salt tolerance on seed germination for 24 genotypes (20 landraces and 4 breeding lines) of barley. The genotypeswere evaluated by several criteria, at 4 salt concentrations (0, 100 mM, 150 mM and 200 mM) and 4 seawater concentrations (0%, 20%, 30% and 40%). The results show a large variability within the genotypes for salt tolerance. Genotype × Treatment interaction is significant for root length. The estimates of broad-sense heritability calculated for percentage of germination (PG), percentage of emergence (PE) and radicle length (RL) were quite high for the salt treatment compared with those for the control treatment.Moderate to highBroad sens heritability estimateswere observed for the reduction percentage in both experiments. Discriminant analysis arranged the genotypes in two, clearly separate groups that differ in their tolerance to salinity stress.

Źródło:

Plant Breeding and Seed Science; 2006, 53; 63-72
1429-3862
2083-599X

Pojawia się w:

Plant Breeding and Seed Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Analysis of genetic parameters on Ethiopian mustard (Brassica carinata A. Braun) genotypes in northwestern Ethiopia

Autorzy:

Walle, Tesfaye
Wakjira, Adugna
Mulualem, Tewodros

Powiązania:

https://bibliotekanauki.pl/articles/2199737.pdf

Data publikacji:

2014-06-19

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

Ethiopian mustard
genotype
heritability
phenotype
variability

Opis:

This study was carried out with the objective to estimate the genotypic variability and other yield related traits of Ethiopian mustard in North West Ethiopia. A total of 36 genotypes of Ethiopian mustard were considered for this study. Analysis of variance was computed to contrast the variability within the collected genotypes based on yield and other yield related traits. The results revealed highly significant values(p<0.01) for days to maturity, grain filling period, number of pod per plot, secondary branches per plant, harvest index, seed yield per plot, seed yield per hectare and oil content. Significant differences (p<0.05) were noted for days to flowering, plant height, primary branch per plant, biomass per plot, oil yield per plot differences among the genotypes. Genotypic coefficient of variation (GCV %) was lower than phenotypic coefficient of variation (PCV %) for all the traits studied. High genetic advance with heritability was observed in the following characters; plant height, biomass of the plant, number of secondary branch per plant and grain filling period. There are variations in the extent of genetic variability, heritability and genetic advance of traits which can facilitate selection for further improvement of important traits of Ethiopian mustard. Therefore, it can be concluded that the variability within Ethiopian mustard genotypes collected from different areas of northern Ethiopia is high and vital for better crop improvement.

Źródło:

Plant Breeding and Seed Science; 2014, 69; 25-34
1429-3862
2083-599X

Pojawia się w:

Plant Breeding and Seed Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Combining ability of phenological traits and seed yield in spring rapeseed genotypes

Autorzy:

Rameeh, Valiollah

Powiązania:

https://bibliotekanauki.pl/articles/2199636.pdf

Data publikacji:

2015-06-20

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

additive
diallel
GCA
narrow-sense heritability
rapeseed

Opis:

Six parents and their 15 F2 diallel progenies, totally 21 genotypes, were evaluated for genetic parameters of quantitative characteristics. The traits of interest were growing degree days (GDDs) from sowing to the flowering (DDF), to end of flowering (DDE), flowering period (DFP), to maturity (DDM) and seed yield (SY). Significant mean squares of general combining ability (GCA) was exhibited for DDF, DDE, DFP, DDM and seed yield indicating significant differences of GCA effects of parents for these traits. Significant mean squares of specific combining ability (SCA) for all the traits exhibited the importance of non additive genetic effects for the traits. Significant ratio of MS(GCA)/MS(SCA) and high narrow sense heritability estimates for DDF, DDE, DDM indicating the prime importance of additive genetic effects for controlling these traits. DFP was also less heritable than the other phonological traits, so the efficiency of selection for this trait will be low. All of the combinations with significant negative SCA effects for DDM had at least one parent with significant negative GCA effect for this trait. PF7045/91 with significant positive GCA effect of SY, was best combiner for improving SY. Significant positive correlation between DDM and each of two traits including DDF and DDE, indicating these traits can be used as indirect selection criteria for improving DDM.

Źródło:

Plant Breeding and Seed Science; 2015, 71; 47-56
1429-3862
2083-599X

Pojawia się w:

Plant Breeding and Seed Science

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:

Genetyka zachowania: co wnosi do wiedzy o człowieku?

Autorzy:

Oniszczenko, Włodzimierz

Powiązania:

https://bibliotekanauki.pl/articles/1167863.pdf

Data publikacji:

2017

Wydawca:

Uniwersytet Kazimierza Wielkiego w Bydgoszczy

Tematy:

DNA
behavioural genetics
genetic correlation
heritability
methylation

Opis:

The aim of this article is to highlight the achievements of human behavioural genetics. It begins with a brief overview of the field of contemporary human behaviour genetics. Then, the general principles of behavioural genetics, research methods used, the concept of heritability and areas of rapid advancement in the field are identified. While classical twin studies have been a powerful tool to find heritability or the genetic correlation between different human behaviours, new tools are now available to help identify the genes responsible for individual differences. In particular, association studies and DNA methylation studies are crucial to advancing knowledge on the genetic basis of human behaviour as well as on the epigenetic factors that mediate genetic and environmental effects on behaviour. Several results on the heritability of human behaviour, relationships between genetic polymorphisms and behaviour as well as the consequences of DNA methylation are reported in this article.

Źródło:

Polskie Forum Psychologiczne; 2017, XXII, 1; 5-19
1642-1043

Pojawia się w:

Polskie Forum Psychologiczne

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Estimation of Genetic Parameters, Heritability and Genetic Advance for Yield Related Traits in Upland Rice (Oryza sativa L. and Oryza glaberrima Steud) Genotypes in Northwestern Ethiopia

Autorzy:

Bitew, Jember Mulugeta

Powiązania:

https://bibliotekanauki.pl/articles/1192678.pdf

Data publikacji:

2016

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Genetic advance
Heritability
upland Rice
Variability

Opis:

This study was carried out to assess the extent of genetic variability for yield and yield related traits and to estimkate heritability and genetic advance in rainfed upland rice genotypes Twenty-two selected upland rice varieties were evaluated in randomized complete block design with three replications during 2014 cropping season. The analysis of variance showed highly significant differences (p < 0.01) for days to flowering, days to maturity, hundred seed weight, plant height and panicle length and differed significantly (p < 0.05) for fertile tiller per plant, filled grains per panicle, unfilled grains per panicle ,biomass yield and grain yield per plot except harvest index, indicating the existence of variability. The higher phenotypic and genotypic variance were obtained from number of filled grains, plant height, days for 50% heading, days for 85% maturity and biomass yield indicating high influence of the environment on the traits. The high level of genotypic and phenotypic coefficients of variation was recorded for traits like biomass yield, grain yield, number of fertile tillers per plant and unfilled grains per panicle. Heritability estimates were moderately high for days to maturity (66.01%), and thousand-grain weight (66.80%). High genetic advance as percent of means was observed for biomass yield per plot, unfilled grains per panicle, grain yield per plot, and fertile tiller per plant. Thousand-grain weight showed moderately high heritability coupled with high genetic advance as percent of mean. Therefore, selection based on this character might be effective for increasing grain yield.

Źródło:

World Scientific News; 2016, 47, 2; 340-350
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Gene action and combing ability of some agronomic traits in corn using diallel analysis

Autorzy:

Haddadi, Mohammad Hossein
Esmaeilov, Maqsadollah
Choukan, Rajab
Rameeh, Valiollah

Powiązania:

https://bibliotekanauki.pl/articles/2199579.pdf

Data publikacji:

2014-06-19

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

combined analysis
correlation
dominance
heritability
maize

Opis:

Combining ability estimates are important genetic attributes to maize breeders in anticipating improvement via hybridization and selection. To determine the combining ability for yield and yield associated traits, 8 diverse corn inbred lines were used in a half diallel mating design. Twenty eight F1 progenies along with their parents were planted in randomized complete block design with four replications in two locations during two years. Combined analysis of variance showed significant mean squares of general combining ability (GCA) and specific combing ability (SCA) for Days to silking emergence (DS), plant height (PH), 1000-kernel weight (KW), number of kernels in ear row (KR), number of rows in ear( NR ) , ear diameter (ED), cob diameter (CD), kernel yield (KY) indicating that the importance of both additive and non additive genetic effects for these traits. However, high narrow-sense heritability estimates, low degree of dominance and the ratio of estimates of GCA to SCA effects for DS , NR and CD indicated that additive genetic effect was more important for these traits. Most of the crosses with significant SCA effects for KY had at least one parent with significant GCA effects for the same traits. Significant positive correlations were detected between KY and other yield components including KW, KR, NR and ED, therefore these traits can be used as indirect selection criteria for KY improvement. The crosses MO17 × Line8, MO17 × Line 10 and MO17 × Line 12, Line 8 × Line 10 and Line 8 × Line 21 with high values of KY were considered as good cross combinations for improving the trait.

Źródło:

Plant Breeding and Seed Science; 2014, 69; 35-46
1429-3862
2083-599X

Pojawia się w:

Plant Breeding and Seed Science

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:

Odziedziczalność i współzależność cech rolniczych kukurydzy
Heritability and relationships between maize agricultural traits

Autorzy:

Wójcik, Krzysztof
Kuriata, Rafał
Lewandowska, Sylwia

Powiązania:

https://bibliotekanauki.pl/articles/2198307.pdf

Data publikacji:

2012-06-28

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

analiza ścieżek
kukurydza
odziedziczalność
heritability
maize
path analysis

Opis:

Materiał badawczy stanowiło 28 linii wsobnych kukurydzy. Doświadczenie polowe założono metodą losowanych bloków w trzech powtórzeniach w roku 2009 i 2010. Na podstawie analizy wariancji oszacowano odziedziczalność w szerokim sensie (h2), a także genotypowy współczynnik zmienności (GCV). Ponadto obliczono współczynniki korelacji oraz wykonano analizę ścieżek Wrighta. Współczynnik odziedziczalności wahał się w przedziale od 0,58 dla grubości kolby i wysokości roślin do 0,76 dla liczby dni od siewu do pylenia. Najwyższe wartości GCV przyjmował dla wysokości zawieszenia pierwszej kolby, liczby rzędów ziaren oraz masy ziarna z kolby. Analiza ścieżek wykazała, że największy wpływ bezpośredni i pośredni na masę ziarna z kolby mają długość i grubość kolby, natomiast w mniejszym stopniu liczba dni do pylenia.
Twenty eight inbred lines were investigated in the field experiment. The experiment was arranged in randomized complete block design with three replication in two vegetative seasons 2009 and 2010. Heritability in broad sense and genotypic coefficient of variation (GCV) were calculated based on analysis of variance. Wright’s path analysis was made and coefficients of correlation were calculated. Days until shedding had relatively high heritability (0.76), whereas moderate values were obtained for ear diameter and ear height. The greatest values of GCV were obtained in case of ear height, ear rows number and ear grain weight. Path analysis revealed that ear length and diameter had directly and indirectly the most significant influence on ear grain yield.

Źródło:

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2012, 264; 183-188
0373-7837
2657-8913

Pojawia się w:

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:

Genetic analysis of plant height, yield components and seed yield in rapeseed (Brassica napus L.) cultivars

Autorzy:

Rameeh, Valiollah

Powiązania:

https://bibliotekanauki.pl/articles/2199722.pdf

Data publikacji:

2012-12-20

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

additive
diallel
heterosis
heritability
regression lines
seed yield

Opis:

Half F2 diallel crosses of spring rapeseed (Brassica napus L.) varieties along with their parents were evalu- ated for plant height, first siliqua height, siliquae on main axis, siliquae per plant, 1000-seed weight and seed yield. The Analysis of variance based on Cockerham’s method revealed significant mean squares of general combining ability (GCA), specific combining ability (SCA) for all the traits indicating that both additive and non-additive genetic effects were involved in controlling these traits. Parent vs crosses mean square which is indicating average heterosis was significant for all the traits. In Hayman’s method the regression lines esti- mated for all the traits except plant height cut the Wr axis below the origin in the negative zone, suggesting the overdominance type of gene action for these traits except plant height. Based on the array points on the regression lines, 19H had maximum dominant genes for siliquae on main axis, siliquae per plant 1000-seed weight and seed yield, being closest to the origin, while Option500 possessed recessive genes for first siliqua height, siliquae per plant and 1000-seed weight, as evidenced by its distant position from the origin. Due to low narrow-sense heritability estimates for most of the traits, selection for improving these traits should be carried out in delayed segregating generations.  

Źródło:

Plant Breeding and Seed Science; 2012, 67; 61-74
1429-3862
2083-599X

Pojawia się w:

Plant Breeding and Seed Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Line × tester analysis in rapeseed: Identification of superior parents and combinations for seed yield and its components

Autorzy:

Rameeh, Valiollah

Powiązania:

https://bibliotekanauki.pl/articles/763895.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej

Tematy:

genetic variation
heritability
line × tester
seed yield

Opis:

This research was carried out to investigate the genetic structure of the 20 F1s rapeseed hybrids established from five female moderate maturity lines and four early maturity male testers, to determine parents showing general combining ability (GCA) and detect crosses showing specific combining ability (SCA). Significant variance of parents and crosses for all the traits indicated the existence of significant genetic variation among the parents and their F1 cross combinations. Significant variance of parents vs. crosses revealed significant average heterosis for all the traits except first pod height and seeds per pod. High narrow-sense heritability estimates for number of branches and pods length, indicate the importance of additive genetic effects for these traits. Hybrid performance was generally better than parental performance for all the traits except number of branches and also the genetic variation of lines × testers for all the traits were more than lines and testers. Most of the crosses with high mean value of pods per plant were yielded from the parental lines with high mean value of this trait. The crosses including L41×Foma2, Zafar×R42 and L22B×R38 with significant positive SCA effects of seed yield had also high mean values (3400, 3311.3 and 2904.2 kg ha-1 , respectively) of this trait.

Źródło:

Annales Universitatis Mariae Curie-Sklodowska, sectio C – Biologia; 2015, 70, 2
2083-3563
0066-2232

Pojawia się w:

Annales Universitatis Mariae Curie-Sklodowska, sectio C – Biologia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:

The use of estimates of heritability and genetic variances in selection for chip colour between potato populations

Autorzy:

Domański, Leszek
Zimnoch-Guzowska, Ewa
Domańska, Maria

Powiązania:

https://bibliotekanauki.pl/articles/2199042.pdf

Data publikacji:

2006-06-22

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

breeding
chip colour
heritability
potato
selection response

Opis:

The objective of this research was to examine the expected responses to selection for colour of chips (= crisps) produced directly from tubers stored at 4-6°C for three months in three potato populations. Population 1 was obtained from crossing cv. Lady Claire with parental line M-62774, Population 2 was derived from crossing cv. Snowden with parental line M-62724. Both populations originated from crosses between cold chipping parents. Population 3 was produced by intermating cold chipping parent (cv. Snowden) with good chipping parent (M-62805) that requires the reconditioning treatment. Fifty-eight to sixty random clones for each population plus four parents and four control cultivars were planted in 2003 and 2004 at M³ochów Research Center of Plant Breeding and Acclimatization Institute. A considerable genotypic variation in chip colour after cold storage has been found within three hybrid populations. Heritability estimates were moderate, ranging from 0.42 to 0.53, and each of these populations exhibited good potential advance by selection for chip colour after cold storage.

Źródło:

Plant Breeding and Seed Science; 2006, 53; 73-78
1429-3862
2083-599X

Pojawia się w:

Plant Breeding and Seed Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Seeds and seedlings vigour in tropical maize inbred lines

Autorzy:

Adebisi, M.A.
Kehinde, T.O.
Porbeni, J.B.O.
Oduwaye, O.A.
Biliaminu, K.
Akintunde, S.A.

Powiązania:

https://bibliotekanauki.pl/articles/2199724.pdf

Data publikacji:

2012-12-20

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

correlation
genetic advance
heritability
seed quality
variability

Opis:

Seed and seedling vigour is an aspect of seed quality which affects field establishment and performance. Low maize yields have been reported  to be affected by several factors in which poor quality seed with low seed and seedling vigour. Information is scarce on seed and seedling vigour in maize inbred lines developed for tropical environments. Fifteen genotypes of tropical maize (Zea mays L.) inbred lines were evaluated to determine the level of differences in seed and seedling vigour traits, and extent of relationships among traits and their heritability. A substantial amount of genetic variability was found, which suggested that most of the traits under study could be improved through selection and utilized in breeding programs. Positive and signifi- cant interrelationship  among  seed germination  and seedling  traits  and  a positive  correlation  between  seed germination and seed vigour and field emergence showed that these could be given due consideration in crop improvement for seed and seedling vigour. High genotypic coefficient of variation, heritability and genetic advance were obtained for seed germination, seed emergence, shoot length and seedling vigour index I and II, revealing the possibility of improvement in these characters through direct selection. The principal component analysis (PCA) identified seed emergence, shoot length, seedling vigour index I and II and tetrazolium vigour as characters that contributed greatly to variation in seed vigour in the maize inbred lines. Cluster analysis partitioned the genotypes into two groups, with group I consisting of seven genotypes and group II comprised the other eight genotypes, which suggested that hybridization between the two groups could lead to high level of heterosis. Genotype V5  had superior seedling vigour traits compared to other genotypes. Seedling emer- gence, shoot length, seedling vigour index I, seedling vigour index II and tetrazolium vigour are effective characters for good seedling vigour traits in maize inbred lines investigated.

Źródło:

Plant Breeding and Seed Science; 2012, 67; 87-102
1429-3862
2083-599X

Pojawia się w:

Plant Breeding and Seed Science

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:

Combining ability analysis of some of grain yield stress indices in rapeseed (Brassica napus L.) varieties

Autorzy:

Rameeh, Valiollah

Powiązania:

https://bibliotekanauki.pl/articles/2199638.pdf

Data publikacji:

2012-04-19

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

diallel
genetic parameters
heterosis
narrow-sense heritability and rapeseed

Opis:

Although most of investigations showed that nitrogen fertilizers gave substantial rapeseed yield increases even in diverse and contradicting conditions but in a few studies were focused on genetic parameters of nitrogen stress effects. Combining ability of some of important grain yield stress indices based on application and non application of nitrogen (N+ and N0) was studied using half diallel of six spring rapeseed varieties and their 15 F2 progenies. Significant mean squares of general and specific combining abilities (GCA and SCA) were observed for potential yield(Yp), Stress yield(Ys), mean productivity (MP), geometric mean productivity (GMP), tolerance index (TOL), stress tolerance index (STI) and stress susceptibility index (SSI), indicating importance of additive and non-additive genetic effects for them. Non significant ratio of GCA to SCA mean square and low narrow-sense heritability estimates were detected for all the indices, indicating the prime importance of non-additive genetic effects. Significant positive GCA effect of Yp, Ys, MP, GMP and STI for PF7045/91 and significant negative GCA effects of them for Option500, indicated the same direction of GCA effects of these indices and GCA effects of Yp and Ys. On compare to SCA effects, most of crosses had significant high parent heterosis for Yp, Ys and and all the stress indices, therefore selection the better combinations based on heterosis will be more effective than SCA effect.

Źródło:

Plant Breeding and Seed Science; 2012, 65; 39-50
1429-3862
2083-599X

Pojawia się w:

Plant Breeding and Seed Science

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:

Variation and heritability of sixteen characters in West Africa okra, Abelmoschus caillei (A. chev) Stevels

Autorzy:

Alake, C.O.

Powiązania:

https://bibliotekanauki.pl/articles/2199658.pdf

Data publikacji:

2012-08-20

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

West African okra
heritability
Genetic variability
Cultivars
Seasons

Opis:

Genotypic and phenotypic variances, genotypic and phenotypic coefficients of variation, heritability and genetic advance were estimated for 16 agronomical characters in West African okra for two seasons, using 25 West African okra lines of diverse origin. Considerable differences were observed for some characters in the two seasons. Number  of days to flowering, number of leaves at flowering, plant height at flowering and number of pods at branches showed  seasonal differences. The estimates of genotypic coefficients of variation (gcv) in the two seasons were close in many cases. The gcv values ranged from 1.41 for number of days to flowering in the early season to 68.63 for number of branches per plant in the late season planting. Heritability estimates ranged from 5.02% for number of leaves at flowering in the early season to 99.54% for weight of matured pod during the early season. This study highlighted the significance of genotype-environment interaction in the breeding programmes of West African okra. The relatively large genotypic coefficient of variation, heritability estimates and genetic advance for number of pods at stem, number of pods per plant, number of branches per plant, weight of matured pods and seed yield per plant, were indicative of likely effectiveness of selection for such characters.

Źródło:

Plant Breeding and Seed Science; 2012, 66; 51-62
1429-3862
2083-599X

Pojawia się w:

Plant Breeding and Seed Science

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:

The effect of selection for traits of low heritability conducted in noninbred populations on the basis of progeny or performance tests

Autorzy:

Sobczynska, M
Kownacki, M.

Powiązania:

https://bibliotekanauki.pl/articles/2048147.pdf

Data publikacji:

1995

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

mouse
heritability
mice
selection method
selection response
performance test
progeny

Opis:

The investigations were carried out to compare selection conducted on the basis of progeny with that on the basis of animals'own performance. Selection was conducted for the body weight at weaning (at the age of 21 days), which is a trait of low heritability (h²=0.1). It was run throughout 15 generations, whereas in generations 13 and 14 three experimental replicas were crossed to obtain population free of inbreeding. A cumulated response to selection was higher in the group selected on the basis of animals' own performance, but after crossing the replicas it decreased clearly in the both groups. The cumulated selection differential was higher in the group selected on the basis of animals' own performance. However, a statistical analysis of the obtained results showed no significant difference between the two selection methods.

Źródło:

Journal of Applied Genetics; 1995, 36, 2; 169-175
1234-1983

Pojawia się w:

Journal of Applied Genetics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 16.

Tytuł:

The inheritance of plant height in crosses involving short-stem rye genotypes

Autorzy:

Izdebski, R

Powiązania:

https://bibliotekanauki.pl/articles/2048213.pdf

Data publikacji:

1995

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

inheritance
rye
heritability
plant height
Secale cereale
quantitative trait analysis

Opis:

The paper presents results of studies on the inheritance of plant height in four short-stem genotypes of rye selected from genotypically different collection materials. Short-stem genotypes P-2, P-9, P-30 and P-52 were crossed to a tall-stem inbred line Uniwersalne 145 (S₁₇). The genotype P-2 was additionally crossed to a related, but tall-stem line P-2 W. In each cross combinations six generations - P₁, P₂, F₁, F₂, B₁ (F₁ × P₁) and B₂ (F₁ × P₂) - were examined. Distribution of plant height in hybrid generations had a continuous character, which indicated a polygenic determination of short stem in all "P" genotypes under study. Results of the genetic analysis (degrees of dominance, Burton method, Mather and Cavalli scaling tests, a six-parameter model of inheritance) showed a significant role of additive, dominant and epistatic gene action in genetic determination of short stem in the "P" genotypes. Only in the cross Uniwersalne 145 × P-52 one of the applied methods (a six-parameter model) has not confirmed a significant role of epistasis and dominance. In the cross combinations Uniwersalne 145 × P-2, Uniwersalne 145 × P-9 and Uniwersalne 145 × P-30 a reduction of the plant height was influenced by homozygote × homozygote and homozygote × heterozygote interactions as well as by dominance effects, whereas the plant height increase was influenced by heterozygote × heterozygote interaction as well as by effects of additive gene action. The combination P-2W × P-2 was found to have reverse relationships. The revealed epistasis had a duplicate character. The heritability of plant height was relatively high and varied from 70.4% to 84.9% depending on the cross combination.

Źródło:

Journal of Applied Genetics; 1995, 36, 4; 325-340
1234-1983

Pojawia się w:

Journal of Applied Genetics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 17.

Tytuł:

Zróżnicowanie podatności wybranych odmian ziemniaka na ciemną plamistość pouszkodzeniową bulw
Variation of blackspot susceptibility of the selected potato cultivars

Autorzy:

Domański, Leszek
Michalak, Krystyna
Zimnoch-Guzowska, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/41444446.pdf

Data publikacji:

2007

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

ciemna plamistość pouszkodzeniowa
odmiany ziemniaka
odziedziczalność
blackspot
heritability
potato cultivars

Opis:

W latach 2004–2006 oceniono zróżnicowanie podatności 48 odmian ziemniaka z krajowego rejestru na ciemną plamistość pouszkodzeniową (CPP). Do zainicjowania reakcji ciemnej plamistości bulw został wykorzystany heksagonalny bęben ze sklejki drewnianej. Test przeprowadzono w połowie lutego na próbie 25 bulw z każdej odmiany, o średnicy 55–65 mm, wolnych od uszkodzeń. Ocenę podatności bulw na CPP wyrażano w formie dwóch parametrów: (1) przeciętnej liczby ciemnych plam pouszkodzeniowych na bulwie, (2) procentu bulw wolnych od plam. Wśród ocenianej puli odmian stwierdzono znaczne genetyczne zróżnicowanie pod względem CPP. Dość wysoki stopień genetycznego uwarunkowania (H_b = 0,67–0,71) tej cechy wskazuje, że pula genowa zawarta w grupie odmian o małej podatności na CPP (Vineta, Pirol, Denar, Vitara, Impala, Andromeda, Rosalind, Augusta, Kolia, Kuklik, Bila) może być wykorzystana do podniesienia tolerancji na CPP w nowych populacjach hodowlanych na drodze krzyżowania i selekcji.
The potato cultivars, in the number of 48, from the Polish National List were evaluated for variation of blackspot susceptibility (CPP) in the years 2004–2006. Te hexagon playwood drum was used for induction of blackspot reaction. The blackspot susceptibility test was carried out in mid February on the samples of 25 tubers of each cultivar, 55–65 mm in diameter, free from bruises. Evaluation result of balckspot susceptibility of tubers was expressed in the form of two parameters: (1) mean number of blackspot bruises per tuber, (2) the percentage of bruise free tubers. A considerable genotypic variation in tolerance to CPP was detected among the tested potato cultivars. Moderately high broad-sense heritability of this trait (H_b = 0.67–0.71) indicates that gene-pool of the group of cultivars with low susceptibility to CPP (Vineta, Pirol, Denar, Vitara, Impala, Andromeda, Rosalind, Augusta, Kolia, Kuklik, Bila) may be used for genetic improvement of CPP tolerance.

Źródło:

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2007, 246; 145-149
0373-7837
2657-8913

Pojawia się w:

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 18.

Tytuł:

Genetic control of morphological and physical characteristics determining resistance to lodging in barley [Hordeum vulgare L.]

Autorzy:

Jezowski, S.
Surma, M.
Adamski, T.

Powiązania:

https://bibliotekanauki.pl/articles/26024.pdf

Data publikacji:

2001

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

heritability
barley
plant genetics
resistance
Hordeum vulgare
genetic parameter

Źródło:

International Agrophysics; 2001, 15, 3
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 19.

Tytuł:

Genetic parameters assessment of siliquae associated with stress indices in rapeseed cultivars
Ocena parametrów genetycznych łuszczyn roślin w odniesieniu do wskaźników stresu w odmianach rzepaku

Autorzy:

Rameeh, V.

Powiązania:

https://bibliotekanauki.pl/articles/11236547.pdf

Data publikacji:

2012

Wydawca:

Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie

Tematy:

genetic parameter
assessment
stress index
plant stress
rapeseed
plant cultivar
heritability

Źródło:

Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura; 2012, 67, 4; 35-44
0365-1118

Pojawia się w:

Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 20.

Tytuł:

Genetic determination of variability of barley doubled haploids inoculated with Fusarium culmorum [W.G.Sm.] Sacc. with regard to mycotoxin accumulation and reduction in yield traits

Autorzy:

Surma, M
Adamski, T.
Chelkowski, J.
Golinski, P.
Kaczmarek, Z.
Kostecki, M.
Perkowski, J.
Wisniewska, H.

Powiązania:

https://bibliotekanauki.pl/articles/2042185.pdf

Data publikacji:

2000

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

mycotoxin
heritability
doubled haploid
Fusarium culmorum
yield
barley
accumulation
genetic parameter
reduction

Źródło:

Journal of Applied Genetics; 2000, 41, 4; 237-246
1234-1983

Pojawia się w:

Journal of Applied Genetics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 21.

Tytuł:

Genetic aspects of racing performance in Polish pure-bred Arab horses. I. Genetic parameters

Autorzy:

Sobczynska, M
Kownacki, M

Powiązania:

https://bibliotekanauki.pl/articles/2047090.pdf

Data publikacji:

1997

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

racing performance
horse
heritability
animal breeding
purebred Arabian breed
genetic parameter

Opis:

The objective of this study was to estimate variance components of Polish Arab horses’ racing performance. The traits studied were the log of annual earnings and rank. Fixed effects of the year of race, herd, sex, the annual number of starts and random animal and permanent environment effects were evaluated on both earnings and rank at finish in Polish Arab horses. The obtained data included 2243 records on 4- and 5-year-old horses by 143 sires. Only races in which 4- and 5-year-olds competed were used. Heritability estimates of earnings and rank at finish were 0.22 and 0.25, respectively. Repeatability estimates of these traits were the same as heritability estimates. All the estimates of genetic and phenotypic correlations between the log of earnings and rank at finish were high and positive. Earnings and rank are good criteria for genetic improvement. Rank seems to be a better measure of racing performance.

Źródło:

Journal of Applied Genetics; 1997, 38, 2; 179-186
1234-1983

Pojawia się w:

Journal of Applied Genetics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 22.

Tytuł:

Analiza zdolności kombinacyjnych i odziedziczalność cech plonotwórczych lnu oleistego (Linum usitatissimum L.)
Combining ability analysis and heritability of yield components in linseed (Linum usitatissimum L.)

Autorzy:

Góral, Halina
Ejsmond, Maciej

Powiązania:

https://bibliotekanauki.pl/articles/41488158.pdf

Data publikacji:

2008

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

cechy plonotwórcze
len oleisty
odziedziczalność
zdolność kombinacyjna
combining ability
heritability
linseed
yield components

Opis:

Oceniono wariancję ogólnej (GCA) i swoistej (SCA) zdolności kombinacyjnej, genetyczne i środowiskowe składniki zmienności fenotypowej oraz współczynniki odziedziczalności cech plonotwórczych u lnu oleistego na podstawie mieszańców F₂ otrzymanych z krzyżowań w pełnym układzie diallelicznym kilku zróżnicowanych geograficznie odmian. Wykazano istotne zróżnicowanie GCA odmian pod względem wszystkich badanych cech, SCA dla wysokości roślin i masy 1000 nasion oraz efektów krzyżowań odwrotnych w przypadku liczby torebek z rośliny oraz masy 1000 nasion. Współczynniki odziedziczalności w wąskim sensie ocenione z analizy wariancji i regresji potomstwa względem średniej rodziców były wysokie dla wysokości roślin i mniejsze dla liczby nasion z torebki, masy 1000 nasion i plonu nasion z poletka. Zmienność liczby torebek i masy nasion z rośliny wynikała głównie ze zmienności środowiskowej. Cechy te nie były odziedziczalne. Współczynniki odziedziczalności w szerokim sensie miały podobne wartości jak współczynniki w wąskim sensie, co oznacza, że genetyczna zmienność badanych cech warunkowana jest głównie addytywnym działaniem genów i rokuje postęp selekcyjny we wczesnych pokoleniach mieszańcowych.
Variance of general (GCA) and specific (SCA) combining ability, genetic and environmental components of phenotypic variation and heritability coefficients of yield components in linseed were estimated using F₂ hybrids obtained from diallelic crosses of several geographically diverse cultivars. The GCA of varieties differed significantly for all the analyzed traits, the SCA —for plant height and 1000 seeds weight, and the reciprocal effects — for the number of capsules per plant and 1000 seed weight. The heritability coefficients in narrow sense, computed from the analysis of variance and regression of progenies to parental means, were large for plant height and smaller for the number of seeds per capsule, 1000 seeds weight and seed yield per plot. The variation in the number of capsules per plant and in seed yield per plant was mainly affected by the environment, and these traits were not heritable. The coefficients of heritability in broad sense were similar to those in narrow sense, which means that genetic variation of these traits is mainly affected by the additive gene effects. This indicates that selection in early hybrid generations may be successful.

Źródło:

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2008, 249; 209-215
0373-7837
2657-8913

Pojawia się w:

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 23.

Tytuł:

Ocena półrodzeństw i zróżnicowanie rodów ziemniaka pod względem masy kiełków formowanej w trakcie sezonu przechowalniczego
Half-sib progeny evaluation and variability of potato breeding lines in respect to the mass of sprouts developed during storage season

Autorzy:

Domański, Leszek
Zimnoch-Guzowska, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/41491173.pdf

Data publikacji:

2008

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

genetyczne uwarunkowanie
masa kiełków
rody ziemniaka
heritability
mass of sprouts
potato breeding lines

Opis:

Celem tych badań było: (1) scharakteryzowanie zmienności wśród puli rodów ziemniaka pod względem masy kiełków formowanej w trakcie sezonu przechowalniczego, (2) określenie czy występuje zróżnicowanie wśród półrodzeństw w populacji hodowlanej IHAR O/Młochów, selekcjonowanej na jakość przetwórczą. Materiał badawczy obejmujący 81 genotypów (72 nowe rody i 9 odmian wzorcowych) oceniono w dwóch powtórzeniach, w układzie całkowicie losowym. Masę kiełków oznaczano na czterokilogramowych próbkach bulw, o kalibrażu handlowym po czterech miesiącach przechowywania w 5–6°C i wilgotności względnej 75%. Stwierdzono istotne zróżni¬cowanie zarówno wśród rodów, jak i odmian. Łączna analiza wariancji wykazała, że interakcja genotypy × lata była istotna. Siedemdziesiąt cztery procent z 72 ocenianych rodów oraz odmiany Baszta i Syrena zostały sklasyfikowane jako formy z małą skłonnością do porastania i jednocześnie stabilne pod względem tej cechy. Jedenaście rodów i sześć odmian zostało sklasyfikowane za pomocą statystyki Shukli (σ_i²) jako niestabilne. Wartość współczynnika genetycznego uwarunkowania masy kiełków po czteromiesięcznym przechowywaniu bulw w 5–6ºC kształtowała się na średnim poziomie (h² = 0,54). Najniższą masę kiełków wśród ośmiu analizowanych półrodzeństw charakteryzowało się półrodzeństwo odmiany Albatros.
The objectives of this research were: (1) to characterize the variation of the pool of potato breeding lines in respect to the mass of sprouts developed during storage season, (2) to determine if variation for the above mentioned trait exists among half-sib progenies in breeding population selected for processing quality. The experimental material consisted of eighty-one genotypes (72 breeding lines and 9 control cultivars) that were tested in two replications in a completely random design. Mass of sprouts on four-kilogram samples of marketable tubers was recorded after four months of storage at 5–6°C and 75% RH. Significant differences were detected both within breeding lines and among cultivars. The combined analysis of variance indicated significant genotype × year interaction. Seventy-four percent of the 72 tested breeding lines as well as the cultivars Baszta and Syrena were classified as having a low tendency to sprout during storage and they were found stable for this trait. Eleven breeding lines and six cultivars were rated using Shukla’s statistic as unstable. Broad-sense heritability for the mass of sprouts after 4 months of tubers storage at 5–6º was found to be intermediate (h² = 0.54). Among eight half-sib progenies analyzed, the Albatros half-sib progeny had the lowest mass of sprouts.

Źródło:

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2008, 249; 193-198
0373-7837
2657-8913

Pojawia się w:

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 24.

Tytuł:

Correlations and Heritability of the Characters Determining the Seed Yield of the Panicle Inflorescence Forms of Alfalfa (Medicago X Varia T. Martyn)

Autorzy:

Bodzon, Zbigniew

Powiązania:

https://bibliotekanauki.pl/articles/2199666.pdf

Data publikacji:

2016-12-20

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

alfalfa
expected genetic progress
heritability
interdependence
multiple regression
panicle inflorescence
seed yield

Opis:

Phenotypic correlation coefficients and heritability of the characters determining seed yield of panicle inflorescence forms of alfalfa was examined. Seed yield per plant, which was positively correlated with 10 generative and morphological traits, depended upon the number of pods per panicle and the number of seeds per pod. Variability of these characters determined about 60% of the variability of seed yield. Multiple linear regression and phenotypic correlations show that simultaneous selection for increased pod number per panicle and increased seed number per pod and number of branches per panicle resulted in enhanced seed yield potential. The share of the additive genetic effects in the phenotypic variance for number of pods per panicle was low and about 23%, while for number of seeds per pod and seeds per panicle amounted to about 75-77% and 56-57% respectively.

Źródło:

Plant Breeding and Seed Science; 2016, 74; 19-26
1429-3862
2083-599X

Pojawia się w:

Plant Breeding and Seed Science

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 25.

Tytuł:

Inwentaryzacja zasobów drzewnych w urządzaniu lasu w Polsce
Inventory of timber resources in forest management in Poland

Autorzy:

Jaszczak, R.

Powiązania:

https://bibliotekanauki.pl/articles/1015664.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Leśne

Tematy:

inwentaryzacja
Polska
zasoby drzewne
lesnictwo
urzadzanie lasu
quercus robur
pedunculate oak
variability
heritability

Opis:

The paper presents the comparison of heritability of height and diameter at breast height (dbh) in 7−11− year−old pedunculate oak trees from 5 provenances and 55 families. The provenance heritability for five successive years was high: 0.19−0.80 for height and 0.59−0.87 for dbh. Family heritability was moderate ranging 0.39−0.52 for height and 0.34−0.49 for dbh, while individual−tree heritability values was the lowest equalling 0.08−0.15 for height and 0.06−0.14 for dbh.

Źródło:

Sylwan; 2008, 152, 05; 14-25
0039-7660

Pojawia się w:

Sylwan

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 26.

Tytuł:

Resistance risk assessment: realized heritability, cross resistance and resistance stability of acetamiprid in the cotton aphid, Aphis gossypii Glover (Homoptera: Aphididae)

Autorzy:

Mokbel, E.M.S.

Powiązania:

https://bibliotekanauki.pl/articles/65165.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

resistance risk
assessment
heritability
resistance stability
acetamiprid
cotton aphid
Aphis gossypii
Homoptera
Aphididae

Opis:

The cotton aphid, Aphis gossypii is an economically significant insect pest infesting various important crops and vegetables. The neonicotinoid, acetamiprid was recommended against aphids with excellent results. Resistance emergence and environmental pollution makes acetamiprid a favorable alternative to conventional insecticides. The aims of the present work were to predict acetamiprid resistance risk in A. gossypii, investigate cross resistance to other tested insecticides and explore acetamiprid stability in the absence of selection. A field-collected population from Sharqia governorate, Egypt was selected with acetamiprid. After 16 generations of selection, there was a 22.55-fold increase in LC50 and the realized heritability (h2) of resistance was 0.17. Projected rates of resistance indicated that, ifh2 = 0.17 and 50% of the population was killed at each generation, then a tenfold increase in LC50 would be expected in 12.2 generations. If h2 was 0.27 then 7.63 generations would be needed to achieve the same level. In contrast, with h2 of 0.07 it necessitates about 30 generations of selection to reach the same level. Cross resistance studies exhibited that the selected strain showed obvious cross resistance to the other tested neonicotinoid members, moderate cross resistance to alpha-cypermethrin and no cross resistance to pymetrozine. Fortunately, resistance to acetamiprid in the cotton aphid was unstable and resistance reverses the nearby susceptible strain throughout five generations without exposure to acetamiprid. Our results exhibited cotton aphid potential to develop resistance to acetamiprid under continuous selection pressure. The instability of acetamiprid makes A. gossypii amenable to resistance management tactics such as rotation with pymetrozine.

Źródło:

Journal of Plant Protection Research; 2018, 58, 4
1427-4345

Pojawia się w:

Journal of Plant Protection Research

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 27.

Tytuł:

Variability of the agronomic characters in different types of cultivars of winter oilseed rape (Brassica napus L.)

Autorzy:

Bocianowski, Jan
Liersch, Alina
Nowosad, Kamila
Bartkowiak-Broda, Iwona

Powiązania:

https://bibliotekanauki.pl/articles/2148783.pdf

Data publikacji:

2017-06

Wydawca:

Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy

Tematy:

Brassica napus
cultivar
yield and yield component
quality trait
coefficient of variability
heritability

Opis:

Winter oilseed rape cultivars (open-pollinated variety, four composite hybrids, one restored hybrid and the CMS ogu- ra line) were tested during two crop seasons of 2002/2003 and 2003/2004 in field trials at two locations in western Poland. The objectives of the present study were: to determine the variability of yield and the most important phenotypic traits of different types of winter oilseed rape cultivars and to analyse the genotypic variabi- lity of this cultivars by environment interactions. The growing se- asons differed especially in terms of water supply. Seed yield, yield components and some quality traits (oil content and total glucosi- nolate content) were recorded. The tested cultivars showed sub- stantial differences in terms of yield and other investigated traits. Analysis of variance indicated that the main effects of cultivar and locations were significant for all the traits of the study. Very high heritability estimates were obtained for seed yield (0.90–0.98), yield components (length of silique, number of seeds per silique and weight of 1000 seeds), and also for oil and glucosinolate con- tents. The correlation coefficients between the investigated traits displayed strong positive relationships between seed yield and the number of seeds per silique, chlorophyll content, and the length of flowering period. The results confirmed the higher productivity of hybrid cultivars, as well as their better adaptability to variable environmental conditions, especially drought.

Źródło:

Polish Journal of Agronomy; 2017, 29; 3-11
2081-2787

Pojawia się w:

Polish Journal of Agronomy

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 28.

Tytuł:

Genetic variability and associations between grain yield and related traits in Amaranthus cruentus and Amaranthus hypochondriacus grown at two locations

Autorzy:

Oduwaye, O.A.
Porbeni, J.B.O.
Adetiloye, I.S.

Powiązania:

https://bibliotekanauki.pl/articles/1080273.pdf

Data publikacji:

2016

Wydawca:

Instytut Ogrodnictwa

Tematy:

Amaranthus cruentus
Amaranthus hypochondriacus
genetic variability
heritability
path analysis
grain yield
inflorescence length
morphological parameter

Opis:

For plant genetic improvement, it is paramount to determine genetic components for the selection of desirable traits. Eighteen Amaranthus cruentus and 11 Amaranthus hypochondriacus genotypes were evaluated at two locations in Nigeria differing in temperature/precipitation to determine the influence of environment on genetic gain. Genotype × environment was significant for all analysed morphological parameters and for grain yield, 1000 seed weight and no. of days to 50% flowering in A. cruentus. In A. hypochondriacus genotype × environment was significant for plant height, leaf length and width, leaf area, inflorescence length, 1000 seed weight and grain yield. Higher genotypic coefficient of variability, heritability estimates, and genetic advance was observed for the traits at Abeokuta (more wet) than Ibadan (more dry) conditions. Grain yield had positive association with the traits at the two locations except the number of leaves and inflorescence length. Inflorescence length was positively associated with grain yield at Abeokuta and negatively associated at Ibadan. Path analysis indicated simultaneous improvement of grain yield with petiole length and leaf length at Abeokuta but with petiole length and leaf area at Ibadan. In general, the locations had potential for genetic improvement of traits of amaranth grain; therefore, selection criteria for improving grain yield should be considered with respect to environment.

Źródło:

Journal of Horticultural Research; 2016, 24, 2; 91-99
2300-5009

Pojawia się w:

Journal of Horticultural Research

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 29.

Tytuł:

Direct effects of cyclic selection for longer seminal roots in spring barley [Hordeum vulgare L.]

Autorzy:

Gorny, A G

Powiązania:

https://bibliotekanauki.pl/articles/2048122.pdf

Data publikacji:

1995

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

selection
root length
cyclic selection
barley
spring barley
Hordeum vulgare
seminal root
root
realized heritability

Opis:

Cyclic pedigree selection for longer seminal roots was performed in the F₂, F₃ and F₄ generations of hybrid population of spring barley. The total length of roots was measured in seedlings grown in filter-paper rollers. The intensity of selection was 20% (C₁, C₂ cycles) and 26% (C₃). Selection was effective. On an average, the finally selected F₅-pedigrees formed 6% longer seminal root system than the initial F₂'s and much of them exhibited 7-16% improved rooting when compared with the best parent in a sand-vermiculite pot culture. Realized heritabilitiy coefficient of the root length ranged from 0.21 to 0.37 when assessed by the ratio of selection response to selection differential, while those estimated by the parent- offspring regressions attained 0.40-0.53. The obtained results suggest that progeny evaluation and/or selection delayed for later generations should be essential for more effective root selection in barley.

Źródło:

Journal of Applied Genetics; 1995, 36, 1; 17-26
1234-1983

Pojawia się w:

Journal of Applied Genetics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 30.

Tytuł:

Analiza uwarunkowań genetycznych cech struktury plonu u mieszańców pokolenia F₁ i F₂ otrzymanych z krzyżowań diallelicznych pszenicy ozimej
Analysis of genetic determination of yield components traits in F1 and F2 generations of winter wheat diallel crosses

Autorzy:

Nawracała, Jerzy
Łuczkiewicz, Tadeusz
Dyba, Stanisław

Powiązania:

https://bibliotekanauki.pl/articles/41521648.pdf

Data publikacji:

2008

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

analiza dialleliczna
komponenty genetyczne
odziedziczalność
pszenica ozima
diallel analysis
genetic components
heritability
winter wheat

Opis:

Do krzyżowania diallelicznego (model II Griffinga) wybrano jedenaście zróżnicowanych pod względem cech agronomicznych i jakościowych odmian pszenicy ozimej. Dwa doświadczenia (bloki losowane, trzy powtórzenia): jedno z pokoleniem F₁, drugie z pokoleniem F₂ (55 mieszańców i odmiany rodzicielskie w każdym) przeprowadzono w RGD w Dłoni w 2004 r. Oceniono odziedziczalność oraz komponenty genetyczne dla cech morfologicznych i cech komponentów plonu. Addytywne działanie genów stwierdzono w determinacji wszystkich badanych cech w pokoleniu F₁ i F₂. Na wysokość roślin, liczbę kłosów w obydwu pokoleniach i na liczbę kłosków w kłosie oraz masę ziaren z kłosa w pokoleniu F₂ istotny wpływ miały efekty dominacji. Nieaddytywny komponent (H1) był większy niż addytywny (D) dla liczby kłosów w obydwu pokoleniach. Pomiędzy pokoleniami stwierdzono różnice w odziedziczalności w szerokim sensie dla liczby ziaren z kłosa, a w wąskim sensie dla masy ziaren z kłosa. W ocenie addytywnego działania genów, nieaddytywnych efektów i dominacji, podobieństwo pomiędzy pokoleniami było większe niż podobieństwo w ocenie odziedziczalności w szerokim i wąskim sensie.
Eleven winter wheat varieties, differing in agronomic and quality traits, were chosen for diallel crosses (Griffing’s model II). Two experiments: with F₁ and F₂ generations (55 hybrids and their parents for each) were carried out at the ARS in Dłoń in 2004. Both experiments were performed in randomised block design with three replications. Heritability and genetic components for morpholohgical and yield components traits were calculated. The additive genes action was significant in determination of all examined traits in F₁ and F₂ generations. Dominance had a significant effect on plant height, number of spikes per plant in both generations, and on number of spikelets per spike and weight of grain per spike in F₂ generation. Nonadditive component (H1) was higher than additive (D) for number of spikes in both generations. Differences were found between generations for heritability in broad sense for number of grains per spike, and for heritability in narrow sense for weight of grains per spike. Similarity between generations F₁ and F₂ in evaluation of additive, nonadditive genetic components and dominance was higher than evaluation of heritability in broad and narrow sense.

Źródło:

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2008, 250; 59-65
0373-7837
2657-8913

Pojawia się w:

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 31.

Tytuł:

The current state and efficiency use of in situ and ex situ conservation units for seed harvesting in the central part of Ukraine

Autorzy:

Neyko, Ihor
Yurkiv, Zinoviy
Matusiak, Mykhailo
Kolchanova, Olena

Powiązania:

https://bibliotekanauki.pl/articles/2044109.pdf

Data publikacji:

2019

Wydawca:

Instytut Badawczy Leśnictwa

Tematy:

tree breeding
in situ and ex situ conservation
heritability
progeny tests
seed orchards
plus trees

Opis:

Significant increase of biological stability, timber volume, and economic value of forests is impossible without refinement and improvement of the organization, and implementation of forest seed production on a genetic and breeding basis. It is possible to solve this task by creating and efficiently functioning in situ and ex situ facilities. In Ukraine, the basic principles of plus selection are envisaged, which include the selection and testing progeny of plus trees. The total number of progeny tests in Ukraine is 106 plots, in which 1,079 genotypes of plus trees are presented. Taking into account the total number of plus trees in Ukraine (4,560), only 23.7% was subjected to progeny tests. The largest number of progeny tests are represented by Scots pine (Pinus sylvestris L.) – 76 plots and a significantly smaller number of plots for English oak (Quercus robur L.) – 21. The corresponding representation of genotypes is for pine – 520, for oak – 365. The area of tree breeding units in Ukraine is very small (0.4–0.6%) of the total forest area in the region. Despite the available areas, the use of in situ and ex situ objects for harvesting seed in Ukraine is low, around 30%. In the central region of Ukraine, the share of in situ and ex situ objects from the total forest area is 0.1–0.5%. On these sites, from 0 to 54% is harvested, which is insufficient. According to the results of the conducted research, it was established that the areas of permanent forest-seed base (in situ and ex situ units) are insignificant and their use is insufficient. Testing of more than 70% of the selected plus trees is required. An important trend is to study the genotype-environment interaction in connection with trends of global climate change.

Źródło:

Folia Forestalia Polonica. Series A . Forestry; 2019, 61, 2; 146-155
0071-6677

Pojawia się w:

Folia Forestalia Polonica. Series A . Forestry

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 32.

Tytuł:

Variability in inflorescences in various variety types of common sunflower [Helianthus annuus L.]
Zmiennosc kwiatostanow roznych typow odmian slonecznika zwyczajnego [Helianthus annuus L.]

Autorzy:

Kluza-Wieloch, M.

Powiązania:

https://bibliotekanauki.pl/articles/878442.pdf

Data publikacji:

2005

Wydawca:

Uniwersytet Przyrodniczy w Poznaniu

Tematy:

variability
Przybroda Experimental Station
Helianthus annuus
plant cultivar
heritability
Polska
common sunflower
sunflower
botany
Poznan city
Wielkopolska region

Źródło:

Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana; 2005, 08
1896-1908

Pojawia się w:

Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 33.

Tytuł:

Micropropagation of wild chicory (Cichorium intybus L. var. silvestre Bisch.) from leaf explants
Mikrorozmnażanie cykorii podróżnik (Cichorium intybus L. var. silvestre Bisch.) z eksplantatów liściowych

Autorzy:

Doliński, R.
Olek, A.

Powiązania:

https://bibliotekanauki.pl/articles/11542521.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie

Tematy:

micropropagation
wild plant
chicory
Cichorium intybus var.silvestre
leaf explant
in vitro propagation
organogenesis
heritability coefficient

Opis:

Cichorium intybus is edible, medicinal and forage plant. The pharmaceutical raw materials were obtained from wild chicory (var. silvestre). Currently, farmers are increasingly assume plantations of wild chicory, and breeders are attempting to produce cultivars for medicinal purposes. In the modern breeding of chicory important feature is the ability to clonal propagation in vitro culture. The aim of our study was to assess capacity of natural population of wild chicory for plant regeneration from leaf explants. In the first was examined the effect of 16 combinations of various concentrations of IAA and 2iP on the regeneration of shoots from leaf explants (0.5 cm2 ). After that, 25 plants were propagated on the medium which was found as optimal. Then, their callus growth and shoots regeneration capacities were compared. Later on, was examined the effect of various IAA concentrations on the rooting of shoots. The majority of the shoots was regenerated from callus but direct organogenesis was also observed (8%). Shoot regeneration was found to be the most efficient on MS medium containing 0.5 mg dm-3 IAA and 4 mg dm-3 2iP – 97% of the explants produced shoots, while the average number of shoots was 15.5. The amount of callus was found to be a highly heritable trait (h2 = 0.83). Lower the heritability coefficients were obtained for the number of shoots per explant (0.55) and the average shoot weight (0.40). The wild chicory shoots rooted easily. The number and weight of roots increased with the increasing concentration of IAA.
Cichorium intybus jest rośliną jadalną, leczniczą i pastewną. Surowce lecznicze były do niedawna uzyskiwane z roślin cykorii dzikiej (var. silvestre). Obecnie rolnicy coraz częściej zakładają plantacje „dzikiej cykorii”, a hodowcy podejmują próby wytwarzania odmian uprawnych przeznaczonych do celów leczniczych. W nowoczesnej hodowli cykorii ważną cechą jest zdolność do klonalnego rozmnażania w kulturach in vitro. Celem naszych badań była ocena naturalnej populacji dzikiej cykorii pod względem zdolności do regeneracji roślin z eksplantatów liściowych. Oceniono wpływ 16 kombinacji różnych stężeń IAA i 2iP na indukcję kalusa i regenerację pędów z eksplantatów liściowych (0,5 cm-2). Następnie, na pożywce uznanej za optymalną, porównano 25 roślin cykorii pod względem zdolności do tworzenia kalusa i regeneracji pędów. Potem badano wpływ różnych stężeń IAA na ukorzenianie pędów. Regeneracja pędów odbywała się głównie z udziałem kalusa, ale obserwowano też organogenezę bezpośrednią (8%). Największą efektywność regeneracji pędów stwierdzono na pożywce MS zawierającej 0,5 mg dm-3 IAA i 4 mg dm-3 2iP – 97% eksplantatów wytworzyło pędy, ze średnią liczbą 15,5. Cechą wysoko odziedziczalną była ilość kalusa (h2 = 0,83). Niższe współczynniki odziedziczalności otrzymano dla liczby pędów na eksplantacie (0,55) i masy średniego pędu (0,40). Pędy dzikiej cykorii łatwo się ukorzeniały. Liczba korzeni i ich masa rosły wraz ze wzrostem stężeń IAA.

Źródło:

Acta Scientiarum Polonorum. Hortorum Cultus; 2013, 12, 6; 33-44
1644-0692

Pojawia się w:

Acta Scientiarum Polonorum. Hortorum Cultus

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 34.

Tytuł:

Comparison of phenotypic and genetic selections in Scots pine (Pinus sylvestris L.) single tree plot half-sib progeny tests

Autorzy:

Kowalczyk, J

Powiązania:

https://bibliotekanauki.pl/articles/41778.pdf

Data publikacji:

2005

Wydawca:

Polska Akademia Nauk. Instytut Dendrologii PAN

Tematy:

Scotch pine
Pinus sylvestris
genetic selection
phenotypic selection
selection index
heritability
genetic gain
genetic diversity
progeny test
statistical method

Opis:

The study was carried out in three Scots pine (Pinus sylvestris L.) single tree plot half-sib progeny tests planted in 1984–86. Phenotypic selection was done in two ways: F about 0.5% to 1% of the total number of trees were chosen by the author on the basis of their appearance only, and Fbis on the basis of diameters at breast height and heights measurements and observations scored for individual trees. The best trees were selected on the basis of the index value weighing traits by their economic value. Genetic selection was performed based on both family index value (Wf) and tree index value (WT), weighing traits by heritability and economic value. This was done in four different ways: (A) The best trees were selected only on the basis of their index value (WT) with no attention paid to the family; (B) About 10 to 12 trees were selected in the best families, (both (Wf) and (WT) were taken into consideration); (C) The best 30% of the families (Wf) were selected and then equal numbers of best trees were selected (WT); (D) The same number families (Wf) as in the phenotypic selection were selected and within these families equal numbers of best trees (WT). The number of trees that were genetically selected was always the same as the number of phenotypically selected ones (selection type F). The selections were compared using a calculated expected genetic gain and the relative loss of effective population size. As expected, phenotypic selection resulted in the lowest genetic gain. Phenotypic selection generally conserved genetic variability, while genetic selection reduced it, especially when genetic gain was maximised. Phenotypic selection type F generally identifies the good families. The agreement of genetic selection with the phenotypic selection is low (0% to 19%) at the individual tree level. This is slightly better with phenotypic selections using measurements data (Fbis). Phenotypic selection is recommended only where information concerning pedigrees is not available. It can provide a simple and cheap way of obtaining material for future selection. Genetic selection method (A) where best trees were selected without any restrictions provided highest genetic gain and cause the greatest loss of genetic diversity.

Źródło:

Dendrobiology; 2005, 53; 45-56
1641-1307

Pojawia się w:

Dendrobiology

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 35.

Tytuł:

Badania nad zachowaniem zasobów genowych sosny zwyczajnej z Puszczy Nadnoteckiej
Conservation of Scots pine genetic resources in the Notecka Primeval Forest

Autorzy:

Wesoły, W.
Urbański, K.

Powiązania:

https://bibliotekanauki.pl/articles/1026655.pdf

Data publikacji:

2003

Wydawca:

Polskie Towarzystwo Leśne

Tematy:

zasoby genowe
Puszcza Notecka
hodowla lasu
sosna zwyczajna
lesnictwo
uprawy rodowe
Pinus sylvestris
drzewa lesne
scots pine
family test
heritability

Opis:

The results of measurements of a 5−year family experiment Scots pine (21 families) located on three study sites showed significant variation in tree height and the length of the last shoot increment between families and locations. The analysis pointed out to the low heritability values.

Źródło:

Sylwan; 2003, 147, 08; 61-66
0039-7660

Pojawia się w:

Sylwan

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 36.

Tytuł:

Stanowisko parczeliny trójlistkowej Ptelea trifoliata L. ssp. trifoliata w lasach Nadleśnictwa Wyszków
The station of the hop tree (Ptelea trifoliata L. ssp. trifoliata) in forests of the Wyszkow Forest District

Autorzy:

Ciosek, M.
Krechowski, J.
Piórek, K.
Sikorski, R.

Powiązania:

https://bibliotekanauki.pl/articles/1312304.pdf

Data publikacji:

2015

Wydawca:

Instytut Badawczy Leśnictwa

Tematy:

lesnictwo
lasy
gatunki introdukowane
parczelina trojlistkowa
Ptelea trifoliata
wystepowanie
stanowiska
Nadlesnictwo Wyszkow
testing program
survival
tree height
heritability
stability of genotypes

Opis:

This research was carried out on two experimental plots located in the Rymanów and Nawojowa forest districts. In the second and fifth year after planting, at three and six years of age respectively, survival and height of 25 beech progenies of selected stands were measured. Furthermore, we show the effect of beech origin and growth environment (significant ‘provenance × block’ and ‘provenance × test plot’ interactions). Beeches from both experimental plots differed significantly in growth and survival and this difference increased with tree age. The highest provenance heritability was obtained for the tree height after two years of growth in Rymanów. In Nawojowa, the heritability of beech survival reached zero after five years of growth. An evaluation of the stability of beech provenances (genotypes) in terms of survival and height under the habitat conditions of our experimental plots was done using the Finlay and Wilkinson method. The beech provenances of 469–Nawojowa and 452–Lesko (regional standard) were included as a stable basis for reference. A high degree of stability and high average values for the characteristics investigated indicate highprogeny quality within these stands.

Źródło:

Leśne Prace Badawcze; 2015, 76, 1; 49-58
1732-9442
2082-8926

Pojawia się w:

Leśne Prace Badawcze

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 37.

Tytuł:

Proweniencyjno-rodowa zmienność terminu wiosennego rozwoju pąków brzozy brodawkowatej (Betula pendula Roth)
Provenance-family variation in the time of spring bud development in silver birch (Betula pendula Roth)

Autorzy:

Wojda, T.
Niemczyk, M.
Kowalczyk, J.

Powiązania:

https://bibliotekanauki.pl/articles/994522.pdf

Data publikacji:

2012

Wydawca:

Polskie Towarzystwo Leśne

Tematy:

fenologia
drzewa
brzoza brodawkowata
Betula pendula
paki lisciowe
rozwoj pakow
rozwoj wiosenny
proweniencje
rody hodowlane
bud development time
provenance
family
heritability

Opis:

The aim of this study was to assess the variation of bud development time of the Polish and Latvian silver birch provenances and its impact on tree growth in the juvenile phase. The assessment of bud development was carried out in 2008 and 2009 on three experimental plots with ten Polish and three Latvian provenances using a six−point scale. Browsk, Augustów and Latvian provenances are in the group of provenances that develop early buds, while the provenances from Łobez, Młynary and Golub develop late buds. The spring development of silver birch buds shows a clinal variation depending on the longitude. The spring leaf development of the eastern provenances begins earlier than the western ones. The dependence of growth traits on the time of bud development has not been sufficiently proven and requires further research.

Źródło:

Sylwan; 2012, 156, 03; 197-207
0039-7660

Pojawia się w:

Sylwan

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 38.

Tytuł:

Analysis of genetic components of winter oilseed rape (Brassica napus ssp. oleifera ) regeneration ability under in vitro culture

Autorzy:

Turczynowska, A.
Siatkowski, I.
Broda, Z.

Powiązania:

https://bibliotekanauki.pl/articles/81013.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

winter oilseed rape
Brassica napus var.oleifera
in vitro culture
regeneration ability
general combining ability
specific combining ability
heritability

Źródło:

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796

Pojawia się w:

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 39.

Tytuł:

Genetic variability, inheritance and correlation for mineral contents in cabbage (Brassica oleracea var. capitata L.)

Autorzy:

Singh, B.K.
Sharma, S.R.
Singh, B.

Powiązania:

https://bibliotekanauki.pl/articles/2100.pdf

Data publikacji:

2013

Wydawca:

Instytut Ogrodnictwa

Tematy:

cabbage
Brassica oleracea var.capitata
genetic variability
inheritance
mineral content
dietary mineral
iron
zinc
copper
manganese
potassium
calcium
heritability

Źródło:

Journal of Horticultural Research; 2013, 21, 1
2300-5009

Pojawia się w:

Journal of Horticultural Research

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 40.

Tytuł:

Zastosowanie analizy ścieżek do oceny determinacji plonu nasion życicy trwałej
The path analysis for assessment of the determination of ryegrass seed yield

Autorzy:

Gozdowski, Dariusz
Martyniak, Danuta
Mądry, Wiesław

Powiązania:

https://bibliotekanauki.pl/articles/41445601.pdf

Data publikacji:

2008

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

analiza ścieżek
cechy plonotwórcze
odziedziczalność
plon nasion
życica trwała
path analysis
yield-related traits
heritability
seed yield
perennial ryegrass

Opis:

W latach 2001–2002 przeprowadzono doświadczenie hodowlane, w którym oceniano plon nasion i inne cechy plonotwórcze roślin w kolekcji 59 rodów życicy trwałej. Głównym celem analizy statystycznej uzyskanych danych doświadczalnych była ocena wpływu rozpatrywanych cech plonotwórczych na plon nasion z rośliny, za pomocą analizy ścieżek. Wykazano podobny wpływ liczby pędów generatywnych na roślinie oraz masy nasion w kłosie na plon nasion z rośliny (współczynniki ścieżek równe odpowiednio 0,45 i 0,45). Wpływ liczby nasion w kłosie na masę nasion z kłosa był dość duży, natomiast masy tysiąca nasion był stosunkowo niewielki (współczynniki ścieżek równe odpowiednio 1,00 i 0,43). Stwierdzono także ujemną współzależność między liczbą nasion w kłosie a MTZ.
In the years 2001–2002, the breeding experiment with ryegrass was carried out. Seed yield and yield-related traits of plants for 59 advanced ryegrass lines were evaluated. The experimental data were analyzed statistically (e.g. using path analysis) to evaluate the determination of seed yield by examined yield-related traits. The effects of a number of fertile stems per plant and seed weight per spike on seed yield per plant were found similar (values of path coefficients were, respectively, equal to 0.453 and 0.449). The effect of a number of seeds per spike on weight of seeds per spike was quite strong, but that of 1000-grain weight was relatively weak (values of path coefficients were, respectively, equal to 1.003 and 0.429). The compensation between 1000-grain weight and a number of seeds per spike was found.

Źródło:

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2008, 247; 89-97
0373-7837
2657-8913

Pojawia się w:

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Analiza dziedziczenia genotypów transferyn u tryczków pochodzących z bliźniąt
Polimorfizm transferrina i gemoglobina v sopostavlenii s oplodotvorimostyo u ovec
Analysis of heritability of transferrin genotypes in twin ram-lambs

Autorzy:

Trela, E.

Powiązania:

https://bibliotekanauki.pl/articles/803508.pdf

Data publikacji:

1988

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

hodowla zwierzat
genetyka zwierzat
owce
tryczki
urodzenia blizniacze
genotyp
transferyna
dziedziczenie cech
sheep
heritability
transferrin
genotype
ram
lamb
twin animal

Opis:

Анализ 273 пар баранчиков-близнецов показал, что генотип одного из близнецов яа зависит от генотипа другого. Отношения между гомои гетерозиготами, а также между близнецами одинакового генотипа и различного генотипа в общем не отличались существенно от ожидаемых теоретически.
The analysis of 273 pairs of twin ram-lambs has proved that the genotype of one of twins does not depend on the genotype of the other. The ratio of homoto heterozygotes and of twins of an equal genotype to those of different genotype did not show greater differences than those expected theoretically.

Źródło:

Zeszyty Problemowe Postępów Nauk Rolniczych; 1988, 352
0084-5477

Pojawia się w:

Zeszyty Problemowe Postępów Nauk Rolniczych

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Odziedziczalność niektórych cech produkcyjnych maciorek rasy czarnogłówka
Nasleduemost nekotoryx proizvodstvennykh priznakov u ovcematok chernogolovok
Heritability of some production traits of "black-head" ewes

Autorzy:

Zajac, S.

Powiązania:

https://bibliotekanauki.pl/articles/800014.pdf

Data publikacji:

1988

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

owce
owca czarnoglowka
rasy zwierzat
genetyka zwierzat
hodowla zwierzat
cechy produkcyjne
odziedziczalnosc cech produkcyjnych
animal genetics
animal breeding
heritability
production trait
Blackhead breed
sheep

Opis:

Соответствующие исследования проводились на черноголовых овцематках из овчарен воеводства Олыитын. Исследования охватывали в Лэнжанах 79 овцематок после 6 баранов, в Лумпе 95 овцематок после 9 баранов и в Воплавке 166 овцематок после 12 баранов. Для указанных популяций оценивали показатели наследуемости следующих признаков: вес тела в возрасте 5 и 12 месяцев, длина и продуктивность потной шерсти в 1-ой стрижке. В популяции ярок из Воплавки был получен очень высокий коэффициент наследуемости для веса тела в 12-месячном возрасте (h²=O,92). Вес тела ярок в 5-месячном возрасте оказался наследуемым в низкой степени. В овчарнях хозяйств Лумпя и Ленжаны вес тела как 5- так и 12-месячных ярок был слабо обусловлен в генетическом отношении. В исследуемых стадах ярок наследуемость продуктивности потной шерсти в I-ой стрижке была несколько ниже показателей наследуемости длины шерсти измеряемой в то же время. Для обоих признаков шерсти во всех овчарнях коэффициенты наследуемости были визкими.
The respective investigations were carried out on "black-head" ewes from sheepyards of the Olsztyn district. The investigations comprised at Łężany 79 ewes after 6 rams, at tumpin 95 ewes after 9 rams and at Wopławka 166 ewes after 12 rams. For these populations heritability indices of the following traits: body weight at the age of 5 and 12 months, grease wool grading and productivity from the 1st shearing, were estimated. In the population of gimmers from Wopławka a very high heritability coefficient for the body weight at the age of 12 months (h² = 0.92) has been obtained. The body weight of 5-month gimmers proved to be little heritable. In sheepyards of Łumpia and Łężany the body weight of both 5- and 12-month gimmers proved to be weakly conditioned in genetic respect. In the investigated flocks of gimmers the heritability of greasy wool production in the 1st shearing was somewhat lower than the heritability indices of wool grading measured at the same time. The heritability coefficients for the both wool treats were low in all sheepyards.

Źródło:

Zeszyty Problemowe Postępów Nauk Rolniczych; 1988, 352
0084-5477

Pojawia się w:

Zeszyty Problemowe Postępów Nauk Rolniczych

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 43.

Tytuł:

The influence of nutrient shortage on the expression of combining ability effects for root characters in spring barley [Hordeum vulgare L.]

Autorzy:

Gorny, A G

Powiązania:

https://bibliotekanauki.pl/articles/2043156.pdf

Data publikacji:

2000

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

root system
water shortage
heritability
dominance
low-input breeding
mineral shortage
additivity
nutrient shortage
root size
genotype
barley
Hordeum vulgare
combining ability

Źródło:

Journal of Applied Genetics; 2000, 41, 2; 63-73
1234-1983

Pojawia się w:

Journal of Applied Genetics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 44.

Tytuł:

Porównanie odziedziczalności proweniencyjnej, rodowej i indywidualnej cech wzrostowych dębu szypułkowego (Quercus robur L.) w doświadczeniu rodowo−proweniencyjnym w Nadleśnictwie Milicz
Comparison of provenance, family and individual heritability of growth traits in pedunculate oak [Quercus robur] in the family-provenance trial in the Milicz Forest District

Autorzy:

Barzdajn, W.

Powiązania:

https://bibliotekanauki.pl/articles/1015662.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Leśne

Tematy:

odziedziczalnosc
zmiennosc cech
wzrost roslin
rody hodowlane
proweniencje
wysokosc drzew
Quercus robur
lesnictwo
piersnice drzew
dab szypulkowy
drzewa lesne
quercus robur
pedunculate oak
variability
heritability

Opis:

The paper presents the comparison of heritability of height and diameter at breast height (dbh) in 7−11− year−old pedunculate oak trees from 5 provenances and 55 families. The provenance heritability for five successive years was high: 0.19−0.80 for height and 0.59−0.87 for dbh. Family heritability was moderate ranging 0.39−0.52 for height and 0.34−0.49 for dbh, while individual−tree heritability values was the lowest equalling 0.08−0.15 for height and 0.06−0.14 for dbh.

Źródło:

Sylwan; 2008, 152, 05; 52-59
0039-7660

Pojawia się w:

Sylwan

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 45.

Tytuł:

Wykorzystanie różnych poziomów intensywności agrotechniki w hodowli pszenicy ozimej
Usefulness of different input level environments in selection of winter wheat

Autorzy:

Drzazga, Tadeusz
Krajewski, Paweł
Śmiałek, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/2198585.pdf

Data publikacji:

2013-12-31

Wydawca:

Instytut Hodowli i Aklimatyzacji Roślin

Tematy:

selekcja posrednia
komponenty wariancyjne
odziedziczalność w szerokim sensie
stopień stresu
hodowla odmian
indirect selection
variance components
broad-sense heritability
stress intensity
variety breeding

Opis:

Przy wprowadzaniu różnych poziomów agrotechnicznych do metodyki doświadczeń hodowlanych należy wybrać strategię selekcji odnoszącą się do różnych systemów produkcyjnych. Wybór bezpośredniej lub pośredniej selekcji w ramach dwóch systemów uprawy zależy od genetycznej korelacji cechy między systemami oraz od jej odziedziczalności. Do oceny efektywności selekcji wykorzystano wyniki plonowania odmian pszenicy ozimej w doświadczeniach PDO w latach 2005–2009, przeprowadzonych na dwóch poziomach agrotechnicznych: standardowym i intensywnym (z pełną ochroną i dodatkowym nawożeniem N). Oceniono osobno dla obu poziomów wariancje fenotypowe, współczynniki powtarzalności, współczynniki zmienności genotypowej i fenotypowej oraz stopień stresu. Wyznaczone współczynniki korelacji genetycznej pomiędzy plonem z poziomu standardowego i intensywnego były dość zróżnicowane (od 0,60 do 0,97). Ocena efektywności selekcji pośredniej dla środowisk uczestniczących w doświadczeniach PDO wskazuje na różne możliwości prowadzenia skutecznej selekcji w ramach dwóch poziomów intensywności zabiegów agrotechnicznych.
Introduction of varying agronomic treatments into breeding experiments calls for the choice of a selection strategy which takes into account the production systems. Decisions concerning direct or indirect selection depend on the genetic correlation and on the heritability of the traits. To assess the selection efficiency, we used yield data from 2005–2009 PDO experiments performed at two agronomic levels: standard and intensive (with full protection and additional N fertilization). For both levels, we estimated phenotypic variances, repeatability coefficients, phenotypic and genotypic variation coefficients and stress degree coefficients. The computed genetic correlation coefficients were relatively variable (from 0.60 to 0.97). The obtained results concerning selection efficiency indicated some possibilities of the effective selection at two levels of agronomic treatments.

Źródło:

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2013, 270; 3-15
0373-7837
2657-8913

Pojawia się w:

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 46.

Tytuł:

Przepukliny świń - problem weterynaryjno-hodowlany
Hernias in pigs - veterinary and breeding problem

Autorzy:

Woźniak, Jakub
Loba, Weronika
Iskrzak, Paweł
Kujawa, Konstancja
Wojtczak, Janusz
Nowacka-Woszuk, Joanna

Powiązania:

https://bibliotekanauki.pl/articles/22180965.pdf

Data publikacji:

2021

Wydawca:

Krajowa Izba Lekarsko-Weterynaryjna

Tematy:

trzoda chlewna
wady wrodzone
przepukliny
przepuklina pachwinowa
markery genetyczne
przepuklina pępkowa
ekspresja genów
odziedziczalność
umbilical hernia
inquinal hernia
genetic markers
heritability
pig
gene expression

Opis:

The occurrence of hernias in pigs is a serious breeding and veterinary problem. Hernia is a condition in which internal organs (most often intestines), protrude through an opening in the layers of muscle and connective tissue of the abdominal wall. There are two major types of hernia - umbilical and inguinal. This pathology is a serious problem in pig production, leading to economic loss through the cost of surgical intervention, increased mortality rate, and reduced carcass value. The overall incidence of hernias in a normal swine population is low but may increase due to matings to a boar that transmits inguinal hernias. The heritability of this trait oscillates around 0.3. Current knowledge of hernias in pigs is scarce, and mostly based on genome-wide association studies. In this review, we indicate the recent studies concerning the genetic markers association analysis in terms of heritability of hernias in pigs. Moreover, the new approach focused on differently expressed genes in swine hernias etiology is here discussed.

Źródło:

Życie Weterynaryjne; 2021, 96, 06; 408-411
0137-6810

Pojawia się w:

Życie Weterynaryjne

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 47.

Tytuł:

Cechy przyrostowe i jakościowe modrzewia polskiego [Larix decidua subsp. polonica (Racib.) Domin] z Góry Chełmowej w 37-letnim doświadczeniu rodowym
Growth and quality traits of half-sib progeny of Polish larch [Larix decidua subsp. polonica (Racib.) Domin] from Gora Chelmowa during 37 years of growth

Autorzy:

Rozkowski, R.
Chmura, D.
Chałupka, W.
Guzicka, M.

Powiązania:

https://bibliotekanauki.pl/articles/973755.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Leśne

Tematy:

modrzew polski
Larix polonica
rody hodowlane
przyrost drzew
leśnictwo
drzewa leśne
zmienność cech
przeżywalność
cechy jakościowe
powierzchnie doświadczalne
Góra Chełmowa
heritability
productivity
selection
European larch

Opis:

We have investigated among−family variation in growth and quality traits of Polish larch [Larix decidua subsp. polonica (Racib.) Domin] from Góra Chełmowa and Bliżyn. Growth traits were measured several times during the 37 years of growth in a progeny test in Kórnik (52 15’N and 17 04’E), while quality traits were investigated at age 22. We have found significant among−family variation in survival rate at age 15; DBH at age 15, 20, 22 and 37; and stand productivity at age 22. Family heritability was high for DBH (0.6−0.8), except after the thinning (0.41). For basal area it was increasing from about 0.4 at age 15 to about 0.7 at age 37. The larch population from Góra Chełmowa is distinguished by a characteristic deformation of a lower trunk (saber−shape). Such a deformation was also observed in this experiment with a high family heritability (0.83). Other quality traits – self−prunning, branch thickness and branch length – did not vary among families. In all traits, the larch family from Bliżyn was better−performing than families from Góra Chełmowa. However, a high variation among tested families and high values of heritability estimates lend possibility of selecting best parents that could potentially be crossed with other highly productive ones of better quality to transmit into progeny other favorable traits of larch from Góra Chełmowa – high resistance to abiotic stresses and low susceptibility to larch cancer. Value of such progeny should be tested in the future.

Źródło:

Sylwan; 2011, 155, 09; 599-609
0039-7660

Pojawia się w:

Sylwan

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 48.

Tytuł:

Produktywność biomasy nadziemnej i podziemnej w doświadczeniu proweniencyjno-rodowym z dębem szypułkowym
Productiviy of aboveground and belowground biomass in an experiment with provenances and half-sib families of pedunculate oak

Autorzy:

Chmura, D.J.
Guzicka, M.
Rożkowski, R.
Michałowicz, D.
Grodzicki, W.
Chałupka, W.

Powiązania:

https://bibliotekanauki.pl/articles/991353.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Leśne

Tematy:

lesnictwo
drzewostany debowe
biomasa nadziemna
biomasa podziemna
akumulacja
alokacja biomasy
drzewa lesne
dab szypulkowy
Quercus robur
rownania allometryczne
rody hodowlane
doswiadczenia proweniencyjne
allometry
biomass allocation
heritability
quercus robur

Opis:

The biomass productivity of individual trees at age 14 years was investigated in the experiment with 8 provenances and 186 half−sib families of pedunculate oak (Quercus robur L.). The aim of the study was to develop allometric equations and estimate heritability of tree biomass. We sampled 28 model trees and measured dry mass of their components, including roots (on 14 trees). A decreasing share of aboveground biomass was allocated to stems, and an increasing share to branches and foliage with increasing tree size. Also a decreasing share of total tree biomass was found in roots with increasing tree dimensions. Allometric equations involving diameter at breast height in combination with tree height were developed to model biomass of all components and whole tree. We used those equations to estimate tree biomass on the subset of research area, involving all provenances and 180 half−sib families. Heritability coefficients for tree biomass were the greatest for provenances (0.84), average for families (0.58) and the lowest for individual trees (0.18). However, estimates of family heritability varied by provenance (from 0.18 to 0.74). These findings suggest that the most efficient strategy for improvement of productivity in pedunculate oak would be selection of provenances and families within provenances.

Źródło:

Sylwan; 2014, 158, 11; 829-839
0039-7660

Pojawia się w:

Sylwan

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 49.

Tytuł:

Proweniencyjna i rodowa zmienność wzrostu wysokości dębu szypułkowego (Quercus robur L.) na powierzchni porównawczej w Nadleśnictwie Bolesławiec, założonej w 1996 roku
The provenance and family variability in pedunculate oak (Quercus robur L.) height on the comparative plot established in 1996 in Bolesławiec Forest District

Autorzy:

Barzdajn, W.

Powiązania:

https://bibliotekanauki.pl/articles/1023317.pdf

Data publikacji:

2004

Wydawca:

Polskie Towarzystwo Leśne

Tematy:

wzrost roslin
rody hodowlane
proweniencje
hodowla lasu
Quercus robur
lesnictwo
dab szypulkowy
zmiennosc
Nadlesnictwo Boleslawiec
drzewa lesne
quercus robur
pedunculate oak
provenance variance
family variance
heritability

Opis:

The paper contains results of the provenance−family experiment with three provenances and 24 families. The studies focused on the height of trees at the age of 3 to 11 years. The genetic variance of 3−year−old seedlings participated in up to 44% to the total variance. In subsequent years, this participation was close to zero due to the decline in participation of environmental variance after outplanting. At the age of 9 years, the genetic component of the variance was noted again. Depending on the provenance the heritability for the height trait at the age of 9 to 11 oscillated from near zero (provenance from Zalesie) to 0.61 (provenance from Tronçais).

Źródło:

Sylwan; 2004, 148, 10; 3-12
0039-7660

Pojawia się w:

Sylwan

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 50.

Tytuł:

Status taksonomiczny borecznika harcyńskiego - Gilpinia hercyniae (Hartig) oraz morfologia, bionomia i ekologia borecznika świerkowca - Gilpinia polytoma (Hartig) (Hymenoptera, Diprionidae). Cz. 2.
The taxonomic status of Gilpinia hercyniae (Hartig) - morphology, bionomics and ecology of Gilpinia polytoma (Hartig) (Hymenoptera, Diprionidae). Part II

Autorzy:

Borowski, J.

Powiązania:

https://bibliotekanauki.pl/articles/1023343.pdf

Data publikacji:

2004

Wydawca:

Polskie Towarzystwo Leśne

Tematy:

borecznik swierkowiec
borecznikowate
ekologia zwierzat
entomologia lesna
morfologia
Gilpinia hercyniae
lesnictwo
Gilpinia polytoma
borecznik harcynski
Diprionidae
bionomia
quercus robur
pedunculate oak
provenance variance
family variance
heritability

Opis:

The paper contains results of the provenance−family experiment with three provenances and 24 families. The studies focused on the height of trees at the age of 3 to 11 years. The genetic variance of 3−year−old seedlings participated in up to 44% to the total variance. In subsequent years, this participation was close to zero due to the decline in participation of environmental variance after outplanting. At the age of 9 years, the genetic component of the variance was noted again. Depending on the provenance the heritability for the height trait at the age of 9 to 11 oscillated from near zero (provenance from Zalesie) to 0.61 (provenance from Tronçais).

Źródło:

Sylwan; 2004, 148, 10; 23-29
0039-7660

Pojawia się w:

Sylwan

Dostawca treści:

Biblioteka Nauki

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