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选择茎秆粗度差异大的3个亲本(CB1、CB4和CB7),配制CB1×CB4和CB7×CB4组合,并分为中、晚稻种植,采用P1、F1、P2、B1、B2和F2 6个基本世代主基因+多基因混合遗传分析方法对该性状进行遗传分析。结果表明:茎秆粗度属于D-2模型(1对加性主基因+加-显性多基因模型),各组合B1、B2和F2世代的主基因遗传率在27.60%～63.69%之间,总基因型遗传率在39.43%～82.01%之间。CB1×CB4和CB7×CB4各世代群体作中稻种植的主基因遗传率比作晚稻种植稍低,总基因型遗传率同样相对较低,说明供试材料作为中稻种植,可能受环境因素的影响比作为晚稻种植更明显。
Three parents (CB1, CB4 and CB7) with large differences in stem thickness were selected to make CB1 × CB4 and CB7 × CB4 combinations and divided into middle and late rice planting with P1, F1, P2, B1, B2 and F2 6 A basic generation major gene + polygene mixed genetic analysis of the traits of genetic analysis. The results showed that the stem thickness was in the D-2 model (one pair of additive major gene plus additive-dominance polygene model). The heritability of the major genes of the combinations B1, B2 and F2 was between 27.60% and 63.69% The total heritability of genotypes ranged from 39.43% to 82.01%. The heritability of the major genes of middle-season rice planting under CB1 × CB4 and CB7 × CB4 was slightly lower than that of late-season rice planting, and the heritability of the total genotypes was also relatively low, indicating that the tested materials could be affected by environmental factors As late rice planting more obvious.