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Tytuł:
Pathogenicity of Bipolaris sorokiniana (Sacc.) Shoem. to selected oat (Avena sativa L.) genotypes .
Autorzy:
Kiecana, Irena
Cegiełko, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2199145.pdf
Data publikacji:
2007-12-20
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
Bipolaris sorokiniana
genotypes
oat
pathogenicity
Opis:
Field experiments with artificial inoculation of soil and grain of 12 oat genotypes with Bipolaris sorokiniana isolate No. 36 were carried out in years 2000-2002 in Zamość region (south-eastern part of Poland). In each year the number of 7-weeks seedlings, number of plants and panicles before harvest and kernels yield from the individual plot were calculated...
Źródło:
Plant Breeding and Seed Science; 2007, 56; 31-45
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic variability, heritability and genetic advance for yield and yield components in watermelon (Citrullus lanatus Thunb.)
Autorzy:
Anburani, A.
Kannan, P.
Muthumanickam, K.
Powiązania:
https://bibliotekanauki.pl/articles/1076673.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Citrullus lanatus
Genotypes
watermelon
yield components
Opis:
Field investigation was carried out to study the genetic variability, heritability and genetic advance and the variability studies showed significant differences among the thirty genotypes for all the thirteen characters. Yield per plant was maximum in CL 4 genotype collected from Atchirupakkam in Villupuram district. The characters viz., number of vines per plant, sex ratio, days to first female flowers, node number of first female flower, days to fruit maturity and number of fruits per plant were recorded the maximum in the same genotype. Genetic analysis indicated maximum phenotypic and genotypic coefficient of variation for single fruit weight and 100 seed weight. The characters viz., fruits diameter, flesh thickness, number of fruits per plant and yield per plant, recorded highest estimate of PCV and moderate estimation of GCV. The characters viz., number of seeds per fruits, flesh thickness, number of primary branches and fruit diameter recorded moderate estimate of PCV and GCV. Lower estimation of GCV was observed for sex ratio, fruit length and number of male and female flowers. High heritability (broad sense) was observed for 100 seed weight, number of seeds per fruit, single fruit weight, vine length, fruit diameter, fruit length, flesh thickness, number of male flowers,sex ratio, yield per plant, number of primary branches per plant, number of female flowers and number of fruits per plant. Based on mean performance, CL 4 followed by CL 22 and CL 10 were selected as the best genotypes in watermelon for the costal ecosystem, by virtue of their higher yield combined with desirable component characters.
Źródło:
World News of Natural Sciences; 2019, 25; 22-30
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ krótkoterminowego przechowywania nasion osiemnastu genotypów pomidora (Solanum lycopersicum L.) na ich kiełkowanie
Effect of short-term storage of seeds of eighteen tomato (Solanum lycopersicum L.) genotypes on their germination
Autorzy:
Chojnowski, M.
Wawrzyniak, A.
Powiązania:
https://bibliotekanauki.pl/articles/2118938.pdf
Data publikacji:
2021
Wydawca:
Instytut Ogrodnictwa
Tematy:
tomato
genotypes
seed storage
germination
primary dormancy
Opis:
The aim of the research was to determine the occurrence of primary dormancy in seeds of 18 tomato genotypes (Solanum lycopersicum L.) – 16 cultivars and two local genotypes – regenerated for the active collection of the National Institute for Horticultural Research. The plants were grown in the field in accordance with the adopted methodology of seed reproduction in the collection of genetic resources of vegetable plants. Tomato fruits were harvested twice a week from July 18 to September 26, 2019. Immediately after harvest, the seeds were extracted from the fruit, cleaned and dried according to FAO standards for gene banks. The seeds prepared in this way were stored for a period of sixty weeks at a temperature of 4±2°C in airtight containers with the addition of silica gel. During this period, after twenty, forty and sixty weeks of storage, their germination was tested. The studied tomato genotypes differed significantly in terms of depth of primary dormancy and rate of releasing from dormancy. Two of the tested cultivars – ‘Parteno’ and ‘Reper’, were characterized by seed dormancy at the level of 44.5% and 35.5%, two genotypes – ‘Amber’ and the local genotype POLPOB17-27 were characterized by dormancy levels of 15% and 18%. Seeds of two of the genotypes studied that did not show primary dormancy twenty weeks after harvest – ‘Zealand’ and the local genotype POLPOB17-28 – after storage for sixty weeks showed a reduced germination rate and a longer mean germination time. It is concluded that the optimum time for testing the germination of tomato seeds stored after harvest at 4 °C is forty weeks after harvest. The level of primary dormancy of the seeds is then the lowest, but the induction of secondary dormancy does not occur yet. When testing the seed germination in an earlier period, dormancy breaking procedures should be considered to obtain correct results.
Źródło:
Zeszyty Naukowe Instytutu Ogrodnictwa; 2021, 29; 15-24
2300-5882
2391-8969
Pojawia się w:
Zeszyty Naukowe Instytutu Ogrodnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hepatitis E - a new era in understanding
Autorzy:
Krzowska-Frycz, J.M.
Lucas, C.
Lucas, G.
Tomasiewicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/2081741.pdf
Data publikacji:
2018
Wydawca:
Instytut Medycyny Wsi
Tematy:
hepatitis E
genotypes
epidemiology
prophylaxis
antiviral therapy
Opis:
Hepatitis E virus [HEV], the last of the five hepatotropic viruses to be discovered, was originally considered to cause an acute, travel-associated self-limiting illness restricted to humans; however, new research shows that there are animal reservoirs and zoonotic transmission. Additionally, HEV is now considered as a major health burden worldwide, leading to significant morbidity and mortality; therefore, the topic of hepatitis E is of re-emerging importance, having brought to light important questions such as the transmission of HEV, especially in developed countries, as well as treatment and vaccination options. HEV belongs to the genus Hepevirus in the Hepeviridae family. The HEV genome sequence is relatively stable; however, there is a diversity of genotypes which are helpful in comprehending the epidemiological phenomena. HEV is classified based on the nucleotide sequences of the genome and is now characterised as a single serotype with four major genotypes [HEV 1–4]. Hepatitis E cases are not clinically distinguishable from other types of acute viral hepatitis, although diagnosis can be strongly suspected in certain epidemiological settings. It is imperative to raise awareness among physicians about the importance of HEV, with the aim of helping recognise, prevent and treat HEV infections. This review article highlights the current developments of HEV in microbiology, epidemiology, clinical features, treatment and prophylaxis.
Źródło:
Annals of Agricultural and Environmental Medicine; 2018, 25, 2; 250-254
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Barley primary microRNA expression pattern is affected by soil water availability
Autorzy:
Swida-Barteczka, Aleksandra
Kruszka, Katarzyna
Grabowska, Aleksandra
Pacak, Andrzej
Jarmolowski, Artur
Kurowska, Marzena
Szarejko, Iwona
Szweykowska-Kulinska, Zofia
Powiązania:
https://bibliotekanauki.pl/articles/1038746.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
pri-miRNA
miRNA
drought
rehydration
barley genotypes
Opis:
MicroRNAs are short molecules of 21-24 nt in length. They are present in all eukaryotic organisms and regulate gene expression by guiding posttranscriptional silencing of mRNAs. In plants, they are key players in signal transduction, growth and development, and in response to abiotic and biotic stresses. Barley (Hordeum vulgare) is an economically important monocotyledonous crop plant. Drought is the world's main cause of loss in cereal production. We have constructed a high-throughput Real-Time RT-qPCR platform for parallel determination of 159 barley primary microRNAs' levels. The platform was tested for two drought-and-rehydration-treated barley genotypes (Rolap and Sebastian). We have determined changes in the expression of primary microRNAs responding to mild drought, severe drought, and rehydration. Based on the results obtained, we conclude that alteration in the primary microRNA expression is relative to the stress's intensity. Mild drought and rehydration mostly decrease the pri-miRNA levels in both of the tested genotypes. Severe drought mainly induces the primary microRNA expression. The main difference between the genotypes tested was a much-stronger induction of pri-miRNAs in Rolap encountering severe drought. The primary microRNAs respond dynamically to mild drought, severe drought, and rehydration treatments. We propose that some of the individual pri-miRNAs could be used as drought stress or rehydration markers. The usage of the platform in biotechnology is also postulated.
Źródło:
Acta Biochimica Polonica; 2016, 63, 4; 817-824
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Clustering durum wheat genotypes in multi-environmental trials of rain-fed conditions
Autorzy:
Sabaghnia, Naser
Mohammadi, Mohtasham
Karimizadeh, Rahmatollah
Powiązania:
https://bibliotekanauki.pl/articles/2199707.pdf
Data publikacji:
2012-08-20
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
GE interaction
genotypes grouping
Triticum durum
seed yield
Opis:
For durum wheat genotypes evaluation in multi-environmental trials (MET), measured seed yield is the combined result of effects of genotype (G), environment (E) and genotype by environment GE interaction. The GE interaction structure  can be identified if the data are stratified into homogeneous  subsets through cluster analysis. A combined analysis to assess GE interactions of 20 durum wheat genotypes across 14 environments was undertaken. The combined analysis of variance for E, G and GE interaction was significant, suggesting differential responses of the genotypes in various environments. Four cluster methods, which differ in the dissimilarity indices depending on the regression model or ANOVA model, were used. According to dendograms of regression methods there were 10 different genotypic groups based on G (intercept) and GE (line slope) sources and 3 different genotypic groups based on GE (line slope) sources. Also, the dendograms of ANOVA methods indicated 11 different genotypic groups based on G and GE sources and 13 different genotypic groups based on GE sources. The above mentioned genotypic groups were determined via F-test as an empirical stopping criterion for clustering. Due to the high values of regression’s determination coefficient which ranged from 92.6 to 99.4, using of the linear regression-based clustering was more practical. The genotypes clustering based on similarity of linear regression parameters or ANOVA model indicated that there were considerable variations among durum  wheat genotypes and there are different with each other in response to environmental changes. Such an outcome could be regularly applied in the future to clattering durum wheat genotypes and other crops based on regression or ANOVA models in the Middle East and other areas of the world .
Źródło:
Plant Breeding and Seed Science; 2012, 66; 119-138
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Contents of Cadmium, .-Lead and Nickel at Different Development Stages of Selected Miscanthus Genotypes
Zawartość kadmu, ołowiu i niklu w różnych okresach rozwoju wybranych genotypów trawy Miscanthus
Autorzy:
Kalembasa, D.
Malinowska, E.
Powiązania:
https://bibliotekanauki.pl/articles/388720.pdf
Data publikacji:
2009
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
trawa Miscanthus
genotypy di- i triploidalne
kadm
ołów
nikiel
nawożenie mineralne
Miscanthus
diploid genotypes
triploid genotypes
cadmium
lead
nickel
mineral nutrition
Opis:
Bioaccumulation of three heavy metals (Cd, Pb, and Ni) at the second cultivation year of Miscanthus sinenis (2 diploid genotypes) and Miscanthus sinensis x gigantheus (3 triploid genotypes) was examined on objects with no fertilization and with NPK nutrition in five dates. Higher mean contents of analyzed heavy metals in triploid than diploid genotypes biomass was found. Mineral nutrition significantly affected the cadmium level in diploid genotypes biomass as well as nickel in all studied genotypes. The highest cadmium concentration was recorded in Miscanthus biomass at the beginning of June, lead - at the beginning of September and October, whereas nickel - at the beginning of July.
Badano bioakumulację trzech metali ciężkich (Cd, Pb i Ni) w drugim roku uprawy trawy Miscanthus sinenis (2 genotypy diploidalne) i Miscanthus sinemis x gigantheus (3 genotypy triploidalne) na obiektach bez nawożenia i nawożonych mineralnie NPK, w pięciu terminach. Stwierdzono (średnio) większą zawartość analizowanych metali ciężkich w biomasie genotypów triploidalnych niż diploidalnych. Nawożenie mineralne znacznie wpłynęło na zawartość kadmu w biomasie genotypów diploidalnych oraz niklu we wszystkich badanych genotypach. Stwierdzono największą zawartość Cd w biomasie miskanta w pierwszej dekadzie czerwca, Pb w pierwszej dekadzie września i października, a Ni w pierwszej dekadzie lipca.
Źródło:
Ecological Chemistry and Engineering. A; 2009, 16, 4; 349-356
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Colletotrichum lindemuthia- num in Phaseolus vulgaris seed.
Autorzy:
Marcinkowska, Joanna Z.
Borucka, Krystyna
Powiązania:
https://bibliotekanauki.pl/articles/2198810.pdf
Data publikacji:
2001-12-20
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
Colletotrichum lindemuthianum
correlation
field
genotypes
intensity
Phaseolus vulgaris
seed
Opis:
There was found significant correlation between incidence of Colletotrichum lindemuthianum in Phaseolus vulgaris seeds and leaves, pods and stem infection by the pathogen under natural field condition of 1997-1999. There was find in this study positive relationship in the case of 7 genotypes evaluated at Radzików (Central Poland) and Jankowice (South-East of Poland). Cultivar Nida was infected only sporadically. All plots of cv. Prosna showed symptoms of antracnose. Infection degrees of cv. Mela were always the highest. Four tested breeding lines were shown to be susceptible on this pathogen.
Źródło:
Plant Breeding and Seed Science; 2001, 45, 2; 59-64
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pathogenicity of Fusarium crookwellense Burgess, Nelson and Toussoun to 12 genotypes of oat (Avena sativa l.).
Autorzy:
Mielniczuk, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/2199152.pdf
Data publikacji:
2008-06-22
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
damping off
field experiment inoculation
Fusarium crookwellense
oat genotypes
susceptibility
Opis:
Within the years 2002-2004 12 genotypes of oat (Bachmat, Budrys, Bohun, Chwat, Cwał, Deresz, Hetman, Rajtar, Sam, Szakal, STH 5501, STH 5601) were examined to determine their susceptibility to Fusarium crookwellense. The examination was led under field conditions of Zamość region (south - eastern part of Poland),. Both oat grains and soil were inoculated with Fusarium crookwellense nr 47, what caused a reduction in numbers of seedlings - from 24.6% (cv. Bohun) to 52.9% (cv. Sam); plants before harvest - from 11.6 (cv. Bohun) to 68% (cv. Sam)...
Źródło:
Plant Breeding and Seed Science; 2008, 57; 3-12
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiplex real-time PCR to identify a possible reinfection with different strains of human cytomegalovirus in allogeneic hematopoietic stem cell transplant recipients
Autorzy:
Zawilinska, Barbara
Szostek, Slawa
Kopec, Jolanta
Piatkowska-Jakubas, Beata
Kosz-Vnenchak, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/1038859.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
HCMV gB genotypes
multiple HCMV infections
reactivation and reinfection
allo-HSCT
Opis:
Human cytomegalovirus (HCMV) infection remains the leading cause of serious contagious complications after allogeneic hematopoietic stem cell transplantation. These infections in HCMV-seropositive recipients can be due to reactivation or reinfection. Different HCMV strains were identified by determining the genotypes isolated from repeatedly tested patients. The UL55 sequences encoding viral glycoprotein B (gB) have been chosen as the target gene. The region, in which the gB precursor protein is cleaved into two fragments by a cellular endoprotease, is characterized by genetic variability, and based on that HCMV is classified into four major genotypes: gB1, gB2, gB3 and gB4. Multiplex real-time PCR assay enabled both, HCMV gB genotyping, as well as simultaneous quantitative assessment of the detected genotypes. This study was carried out in 30 transplant recipients, from whom 105 isolates of HCMV DNA were genotyped. In 40% of recipients, a mixed infection with two or three genotypes was detected. Genotype gB1 dominated in general, and characteristically for mixed infections, the genotype gB3 or gB4 was always present. Although there were no significant differences in the load for each genotype, in case of multiple infections, the number of copies of gB1 genotype was significantly higher when compared to a single gB1 infection. In patients with mixed genotypes, chronic HCMV infections and graft versus host disease were observed more often, as well as antiviral treatment was less effective. It was assumed that these adverse effects can be related to the presence of gB3 and gB4 genotypes.
Źródło:
Acta Biochimica Polonica; 2016, 63, 1; 161-166
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Breeds influence on growth ability and predicting body weight from linear body measurements of ducks at various ages
Autorzy:
Ologbose, F. I.
Benneth, H. N.
Ajayi, F. O.
Powiązania:
https://bibliotekanauki.pl/articles/1031794.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Body weight prediction
Duck Genotypes
Growth performance
Mallard
Muscovy
morphometric traits
Opis:
A total of one hundred and twenty ducklings (i. e. 60 Muscovy and 60 Mallard) were used for the study to evaluate the breeds effect on growth performance and prediction of body weight using linear body measurements of two breeds of ducks with the aid of General Linear Model and stepwise regression procedure of SPSS. Data on individual body weight (BW), body height (BH), body length (BL) breast circumference (BC), thigh length (TL), bill length (BIL), wing length (WL)and shank length (SL) of 120 ducks were collected on Muscovy and Mallard ducks and used to predict body weight at 4 and 8 weeks. The results showed that Muscovy (56.6t ± 6.7 – 1037.5 ± 30.29g) was significantly superior (P<0.05) to Mallard (51.8 ± 1.66 – 875.44 ± 70.30g) in body weight and in all the linear body measurements from day old to week 10. Individual body weight and linear body measurements was predicted at various ages (4 and 8 weeks) by genetic groups. The values of the coefficient of determination (R2) ranged from (88.6 – 97%) and (81.8 – 90.3%) in Muscovy and Mallard respectively at week 4. While, (R2) ranged from (58.7 – 92%) and 80.1 – 86.9%) in Muscovy and Mallard respectively at week 8. Since linear body measurements that can readily predict body weight without ducks being slaughtered, it is therefore, highly desirable as it will ensure the selection of animals that will reach market weight and size at relatively faster rate. This will also serve as a tool for breeders in selecting animals destined for use as breeding stock. These Muscovy and Mallard can be improved by exploiting the principle of phenotypic plasticity to obtain strains to complement other breeds of duck. Muscovy can also be used to upgrade some other indigenous ducks for better performance in a systematic breeding program.
Źródło:
World News of Natural Sciences; 2020, 29, 3; 282-289
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wielocechowa ocena zróżnicowania form lokalnych żyta o różnym pochodzeniu geograficznym pod względem cech morfologicznych i użytkowych
Multivariate evaluation of variability of local rye accessions from different geographical regions based on morphological and agricultural traits
Autorzy:
Kubicka, Helena
Gozdowski, Dariusz
Puchalski, Jerzy
Łuczak, Wiesław
Powiązania:
https://bibliotekanauki.pl/articles/2198245.pdf
Data publikacji:
2012-06-28
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
analizy statystyczne
cechy
formy lokalne
zmienność
żyto
local genotypes
multivariate analysis
rye
traits
variability
Opis:
W latach 2007–2009 oceniano 250 form lokalnych żyta ozimego (Secale cereale L), pochodzących z Portugalii, Brazylii, Macedonii i Serbii pod względem 16 cech morfologicznych i użytkowych w porównaniu do odmiany Dańkowskie Złote. Największe zróżnicowanie form lokalnych dotyczyło następujących cech: długość źdźbła i kłosa, masy 1000 ziaren i liczby ziaren z kłosa. Na podstawie analizy składowych głównych stwierdzono najwyższe współczynniki korelacji dla długości źdźbła i kłosa z pierwszą składową (PC1), zatem można stwierdzić, że te cechy w największym stopniu dyskryminowały badaną grupę form lokalnych. Na podstawie analizy skupień metodą Warda wydzielono 5 grup genotypów form lokalnych żyta podobnych wielocechowo. Najliczniej reprezentowana grupa (104 genotypy) składała się głównie z form lokalnych pochodzących z Portugalii (85 form), oraz polskiej odmiany Dańkowskie Złote. Grupa ta charakteryzowała się na tle innych grup przeciętną długością źdźbła i kłosa, względnie niewielką długością liścia podflagowego i dość dużą masą tysiąca ziaren. Najmniejsza grupa liczyła 3 genotypy, do której zaliczono tylko trzy formy lokalne, po jednej z Macedonii, Portugalii i Serbii. Grupa ta charakteryzowała się najmniejszą długością źdźbła, dość długimi kłosami oraz najdłuższymi liśćmi podflagowymi oraz największą masą tysiąca ziaren.
In 2007–2009, 250 local forms of winter rye (Secale cereale L) were evaluated. These forms came from Portugal, Brazil, Macedonia and Serbia. In the study, 16 morphological and agricultural traits were evaluated and compared with those of the Dankowskie Złote cultivar control. The highest differentiation among the local forms concerned the following traits: stem length and head length, mass of 1000 grains and number of grains per head. On the basis of the results of the principle component analysis, the highest correlations were observed between the lengths of stem and head and the first principal component (PC1); it means that these traits most strongly discriminated the investigated group of local forms. On the basis of Ward’s cluster analysis 5 groups of local genotypes, according to five traits, were distinguished. The largest group (104 genotypes) consisted mostly of local forms of Portuguese origin (85 forms), as well as Polish genotype Dankowskie Złote. That group was characterized by a moderate lengths of stem and head, relatively small length of sub-flag leaf and large mass of 1000 grains. The smallest group consisted of 3 genotypes, one per Macedonia, Portugal and Serbia. This group was characterized by the smallest length of stem, quite large head and the longest sub-flag leaf as well as the highest mass of thousand grains.
Źródło:
Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2012, 264; 105-115
0373-7837
2657-8913
Pojawia się w:
Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Historical and contemporary genotypic population structure of pea Ascochyta blight pathogens Ascochyta pinodes and Phoma pinodella.
Autorzy:
Furgał-Węgrzycka, Helena
Powiązania:
https://bibliotekanauki.pl/articles/2199167.pdf
Data publikacji:
2008-12-21
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
Ascochyta pinodes
distribution of genotypes
Phoma pinodella
genotypic population structure
VCGs genotype frequencies
spatio-temporal scale
Opis:
The historical and contemporary population genotypic structure of pea blight pathogens, A.pinodes and P.pinodella was determined on temporal and spatial scale by using vegetative incompatibility system as phenotypic genetic marker. It has been indicated that since new 1976 VCG genotypes had been introduced into contemporary population in Poland. Significantly genotypic difference was found among old historical subpopulations sampled from different pea cultivars that were grown in three regions of Poland and historical subpopulations sampled from resistance nurseries artificially infested and long – term monocultures of pea. The difference between historical and contemporary populations also was significant indicating the Occurrence of two distinct populations of A.pinodes and P.pinodella during 1975 – 2004 period...
Źródło:
Plant Breeding and Seed Science; 2008, 58; 31-59
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A different path to the summit of Fusarium Head Blight resistance in wheat: developing germplasm with a systemic approach.
Autorzy:
Comeau, A.
Langevin, F.
Caetano, V.R
Haber, S.
Savard, M.E.
Voldeng, H.
Fedak, G.
Dion, Y.
Rioux, S.
Gilbert, J.
Martin, R.A.
Eudes, F.
Scheeren, P.L.
Powiązania:
https://bibliotekanauki.pl/articles/2199597.pdf
Data publikacji:
2011-06-21
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
barley yellow dwarf virus (BYDV)
biotic and abiotic stresses
Fusarium Head Blighy (FHB)
genotypes
resistance
traits interaction
Opis:
In pursuing FHB resistance in wheat, 30 years of conventional breeding efforts in Eastern Canada have brought some progress. Substantial investment and the application in recent years of marker-assisted selection have to date, however, failed to produce agronomic lines that resist FHB as well as Sumai 3. We present here an alternative path, described as the systemic approach. Rather than seeking to introgress specific putative resistance genes, it subjects target germplasm to regimes of repeated cycles of multiple, interacting (biotic and abiotic) stresses in which desirable traits – not always adequately expressed in parental lines – are identified and selected. How can such a seemingly counterintuitive process work? The systemic approach views desired resistance as arising from the interactions of complex regulation mechanisms mediating how a host responds when a pathogen attacks. These constituents of resistance should thus not always be understood simply as discrete Mendelian units. In repeated rounds of selection, the systemic approach captures those rare individuals that embody optimal interactions of traits, and advances them as founders of lines that resist FHB more effectively than if selection focused on FHB alone. In Quebec, we have chosen to select wheat populations under combined pressure from barley yellow dwarf virus (BYDV) infection and FHB. Resistance to FHB and tolerance of BYDV are quantitative traits that interact. BYD increases both the direct losses from FHB and the production of mycotoxins. Selection under virus pressure, therefore, helps identify those individuals which express FHB resistance more effectively. Moreover, the correlates of virus tolerance (physiological efficiency, generalized stress tolerance and yield) point to those plants with better root traits, ability to produce biomass and yield stability. Together with numerous secondary criteria, such selection eliminates all but a few ‘winners’ in each round. Seen from a systemic perspective, the difficulty of identifying good progeny among descendants of crosses with Sumai 3 does not surprise. Deleterious linkages, pleiotropy and epistasis will usually combine in far from optimal expressions of the assembled genetic information. The systemic approach, by contrast, identifies in repeated cycles increasingly optimized expressions of genes, allowing all potential sources of resistance to be explored. Thus resistant lines can readily be derived from the crosses of susceptible parents, an objective rarely sought in conventional, focused approaches. Moreover, wheat plants respond to the systemic approach’s powerful stresses with enhanced epigenetic variation, raw material from which broader ranges of heritable traits can be selected. Germplasm that expresses a full range of attractive traits while resisting FHB as effectively as Sumai 3 can now be shown to be much more abundant than previously imagined. Perhaps this promise will entice more wheat workers to try a systemic approach...
Źródło:
Plant Breeding and Seed Science; 2011, 63; 39-48
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Typy gospodarstw agroturystycznych w Polsce i sylwetka ich właścicieli
Autorzy:
Wojciechowska, Jolanta
Powiązania:
https://bibliotekanauki.pl/articles/1797653.pdf
Data publikacji:
2007-12-30
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
agroturystyka
typy i genotypy gospodarstw agroturystycznych
sylwetka właścicieli
agro-tourism
types and ‘genotypes’ of agrotourism farm
owner profile
Opis:
W artykule przeprowadzono typizację gospodarstw agroturystycznych w świetle kryteriów: przedmiotowych, podmiotowych i relacyjnych. Gospodarstwa agroturystyczne z grupy genotypu przedmiotowo-podmiotowego uznano za dominujące w kraju. Wskazano na zróżnicowanie sylwetki właścicieli gospodarstw agroturystycznych, wyróżniając sześć zasadniczych grup.
The author presents a classification of agrotourism farms in the light of ‘objective’, ‘subjective' and 'relative' criteria. Agro-tourism farms of the ‘objective-subjective’ ‘genotype’ are considered predominant in Poland. Six different profiles of agro-tourism farm owner are distinguished.
Źródło:
Turyzm; 2007, 17, 1-2; 159-171
0867-5856
2080-6922
Pojawia się w:
Turyzm
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 20

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