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    Wyświetlanie 1-3 z 3
    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:
    Combining Abiliiy and Facidr Analysis in F2 Diallel Crosses of Rapeseed Varieties
    Autorzy:
    Rameeh, v.
    Powiązania:
    https://bibliotekanauki.pl/articles/2199587.pdf
    Data publikacji:
    2010-12-01
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    additive
    degree of dominance
    factor loading
    SCA
    Opis:
    Fifteen F 2 progenies derived from a 6x6 half diallel crosses along with their parents of rapeseed (Brassica MpUS L.) varietie5 were evaluated for pods per main axis, pods per plant, length of pod, seeds per pod, 1000- seed weight , grain yield and oil content The Analysis of variance based on Griffing's method two, with mixed-B model on F 2 progenies and their parents revealed significant mean squares for general combining ability (GCA), specific combining ability (SCA) indicating that both additive and non-additive genetic effects were involved in controlling these traits. High narrow-sense heritability estimates and degree of dominance less than one were observed for length of pod and 1000-seed weight indicated the prime importance of additive genetic effects for controlling these two traits. Narrow-sense heritability estimates for pods per main axis, pods per plant, seeds per pod, grain yield and oil content were estimated 0.22, 0.14, 0.30, 0.15 and 0.08, respectively concluded that the importance role of non-additive genetic effects for controlling these traits. Among yield components, pods per main axis and pods per plant had significant positive correlation with grain yield (0.54* and 0.60**), so any changing of these traits would have significant effects on grain yield. Based on the results of factor analysis on GCA effects revealed that pods per main axis, pods per plant and grain yield had high coefficients of factor loading in the factor one, but on SCA effects pods per main axis, pods per plant and 1000- seed weight had high coefficients of factor loading and the same direction of variation.
    Źródło:
    Plant Breeding and Seed Science; 2010, 62; 73-84
    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
      Wyświetlanie 1-3 z 3

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