Varietal Difference and Inheritance of Yield Components of Adzuki Bean Cultivated in Hokkaido

[摘要] A two-year experiment was conducted to investigate varietal differences and genetic correlations among yield components of adzuki bean (Vigna angularis) using varieties cultivated in Hokkaido. Furthermore, an experiment was carried out to clarify the inheritance of the components using a set of half diallel crosses between six varieties. Four yield components, the number of pods per main stem and that of branches, the number of seeds per pod and 100 seed weight were analysed. Varietal differences for all of the yield components examined were highly significant. The dominance effects of genes on the number of pods per main stem and that per branches were noticeable, while the additive genetic effects on both components were also significant. The direction of dominance was toward decreasing number of pods per main stem and toward increasing number of pods per branches. The genetic variations for the number of seeds per pod and 100 seed weight were mainly controlled by the additive genetic effects. The number of pods per main stem was genetically and environmentally independent of the number of pods per branches. The additive genetic effect on the number of pods per branches was associated positively with that on the number of seeds per pod and negativaly with 100 seed weight. There was a negative genetic correlation between the number of seeds per pod and 100 seed weight.

[学科分类] 农业科学（综合）

[关键词] Adzuki bean;アズキ;Genetic correlation;遺伝相関;Half diallel cross;片面ダイアレル分析;Varietal difference;収量構成要素;Yield component;品種間差異