粳稻穗部性状的遗传效应分析

采用数量性状加性-显性遗传模型(AD),对粳稻12个杂交亲本和36个F1代组合穗部的穗长、穗总粒数、穗实粒数、一次枝梗数及二次枝梗数等性状进行遗传分析。结果表明,5个性状的加性及显性效应都达极显著水平,加性遗传方差分量比率较显性大,其遗传以加性效应为主,受加性及显性基因共同控制;各性状F1代显性效应预测值显性,各性状在不同组合间的表现是不一致的,穗总粒数与穗实粒数性状在各组合间的显性效应基本一致,一次枝梗数和二次枝梗数性状在组合间有较大的差异。

Analysis on Genetic Effects of Panicle Trait in Japonica Rice

Genetic analysis of panicle traits were based on the experiment of japonica rice by using an additive-dominance genetic model(AD).The genetic analysis were made using twelve hybrid parents and thirty-six hybrid F_1 panicle traits,such as panicle length,total grain number of panicle,filled grain per panicle,primary branch number,secondary branch number etc.The results showed that additive-dominance effects of five traits were a significance level at 1% and additive genetic variance components rate was bigger than dominance,the genetic was mainly controlled by additive effects and controlled by both additive-dominance genetic effects too.Predicted dominance effects of every trait indicated were different tendency of development in both crosses,dominance effects of total grain number per panicle and filled grain per panicle had a similar tendency of development in crosses,primary branch number and secondary branch number have bigger difference.