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对不同世代姊妹系及其姊妹种穗部性状配合力效应以及遗传成分进行了分析。结果表明,姊妹系及其姊妹种彼此间存在显著差异,姊妹系4和S_2代姊妹种3×4的配合力效应最高,姊妹系2和S_5代姊妹种1×2最差;姊妹种与对应姊妹系的配合力效应是一致的;穗部性状δ_(GCA)~2均在80%以上。以加性效应为主,姊妹系选育过程中,应注重穗粗和千粒重的选择。
The effect of combining ability and the genetic composition of the ear traits of sister lines and their siblings from different generations were analyzed. The results showed that there were significant differences between sisters lines and their sister siblings. The sister line 4 and S_2 s 3 × 4 had the highest combining ability effect, sister line 2 and S_5 sibling 1 × 2 were the worst. The combining ability of sister lines was the same. The panicle traits δ_ (GCA) ~ 2 were more than 80%. In addition, the additive effect should be the main choice. In sibling breeding process, the selection of ear diameter and 1000-grain weight should be emphasized.