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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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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 (Hb = 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 (Hb = 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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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 (σi2) 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
Artykuł
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
Artykuł
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
Artykuł
Wyświetlanie 1-25 z 57

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