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    Wyświetlanie 1-6 z 6
    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:
    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:
    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:
    Relationships between hybrid performance and genetic distance revealed by morphological and AFLP marker in cucumber
    Autorzy:
    Olfati, J. A.
    Samizadeh, H.
    Peyvast, Gh.
    Rabiei, B.
    Khodaparast, S. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2199652.pdf
    Data publikacji:
    2012-04-19
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    cluster analysis
    diallel
    heterosis
    orthogonal comparison
    similarity matrix
    Opis:
    This study investigated the relationship of morphological and molecular genetic distance with hybrid performance and heterosis in cucumber in an attempt to make use of genetic distance in predicting hybrid performance. The results of this study showed that GD, in general, correlated poorly with heterosis and SCA. Results showed that the mean values of the hybrids were significantly larger or smaller for many traits when compared with the mean of parental lines, indicating that heterosis was present for these traits. In next step we compare inter group hybrids versus intra group hybrids. This test showed that intra group hybridization although increased the yield and yield component but decrease some fruit quality such as fruit color and shape.
    Źródło:
    Plant Breeding and Seed Science; 2012, 65; 87-98
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis on genetic contribution of some traits*to seed yield in rapeseed by additive-dominance genetic method of mixed model.
    Autorzy:
    Sabagbnia, N.
    Dehghani, H.
    Alizadeh, B.
    Mohghaddam, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2199586.pdf
    Data publikacji:
    2010-12-01
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    additive x year interaction
    Brassica napus L
    diallel
    dominance x uear interaction
    Opis:
    A genetic model is developed with additive, dominance and genotype × environment interaction effects for the progeny from a diallel mating design. To uncover the genetic contributions of some traits of rapeseed to seed yield and find indicator traits for indirect selection, multivariable conditional analysis was conducted based on this method. Therefore, an experiment was conducted to estimate genetic parameters using a half diallel of nine international rapeseed cultivars. The 36 F1 hybrids, the parents and four additional cultivars were planted in the breeding nurseries in 2008 and 2009. Several traits including number of pods per plant (NPP), pod length (LP), height of the first pod (HFP), height of the first lateral branch (HFB), stem diameter (SD), days of flowering period (FP), days to physiological maturity (DPM) and seed yield were recorded. The genetic variance component (VD×Y) was significant for all the studied traits but the genetic variance component (VA) was significant for NPP, HFB, HFP, DPM and SY traits and the genetic variance component (VD) was significant for HFB, HFP, LP and FP traits. There was significant positive phenotypic correlation (rA) between seed yield with NPP and HFP and there was significant positive dominance × year interaction correlation (rD×Y) between seed yield with NPP and DPM while there was significant negative dominance × year interaction correlation (rD×Y) between seed yield with HFB, LP and FP. There were significantly positive additive effects of SY for two parents Orient and Talaye. Finally according to additive-dominance genetic model and conditional genetic effects, the genotypes Talaye proved good general combiner for seed yield improvement and crosses 4 × 8 (Orient × Talaye), 7 × 8 (Opera × Talaye) were found the best specific combiner for all the studied traits...
    Źródło:
    Plant Breeding and Seed Science; 2010, 62; 57-72
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza genetyczna cech ilościowych pokolenia F1 rzepaku jarego (Brassica napus L.
    Genetic analysis of quantitative traits of F1 generation of spring rape (Brassica napus L.)
    Autorzy:
    Łuczkiewicz, Tadeusz
    Nawracała, Jerzy
    Bocianowski, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/41511090.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    analiza genetyczna
    diallel
    rzepak jary
    genetic analysis
    spring rape
    Opis:
    Przeprowadzono krzyżowanie dialleliczne (typ II wg Griffinga, 1956) pomiędzy 8 liniami wsobnymi (S6) rzepaku jarego. Linie te wyselekcjonowano z 30 linii hodowlanych (SHR Borowo) w oparciu o wyniki wielozmiennej analizy wariancji. Doświadczenie polowe z genotypami rodzicielskimi oraz z mieszańcami F1 przeprowadzono w latach 2002–2003. Wykonano analizę genetyczną dziewięciu cech ilościowych. Dla wszystkich badanych cech w obu latach doświadczenia istotne statystycznie (na poziomie istotności 0,01) okazały się efekty związane z addytywnym działaniem genów. Istotność dominowania obserwowano prawie wyłącznie w pierwszym roku doświadczenia. Współczynniki odziedziczalności analizowanych cech różniły się znacznie w obu latach doświadczenia: w drugim roku były one zawsze niższe. Najwyższe wartości współczynników h2 stwierdzono dla wysokości roślin (0,71 w 2003 r. i 0,30 w 2002 r.), natomiast najniższe dla liczby łuszczyn z rośliny (odpowiednio 0,19 i 0,05).
    Diallel crosses (Griffing’s type II) between 8 inbred lines of spring rape were made. The lines were selected from 30 breeding lines (SHR Borowo) based on the results of multivariate analysis of variance. Field experiments with parental genotypes and F1 hybrids were carried out in the years 2002 and 2003. Genetic analysis of nine quantitative traits was done. Significant effects of additive genes were found for all of the evaluated traits and for both years of the experiment. Significant dominance effects were only observed in the first year of investigations. Coefficients of heritability differed greatly between years of the experiment. These were always lower in the second year. The highest values of heritability were found for plant height (0.71 in 2003 and 0.30 in 2002), whereas the lowest ones were recorded for the number of pods per plant (0.19 and 0.05, respectively).
    Źródło:
    Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2008, 250; 273-278
    0373-7837
    2657-8913
    Pojawia się w:
    Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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