普×爆F3家系穗粒性状及其与膨化倍数的相关分析

在春播和夏播两种环境条件下，对一个普通与爆裂玉米自交系杂交组合的259个F3家系的穗粒性状及其与膨化倍数的相关分析结果表明：F3代分离出优于爆裂亲本穗粒性状的家系较多；穗粒性状是由微效多基因控制的数量性状；百粒重、穗粒重对膨化倍数直接或间接作用为较大负效应，行粒数、轴粗、穗长对膨化倍数的直接作用为正效应，其它性状通过行粒数和穗长对膨化倍数的间接作用多为正效应。因此，可以直接对穗长和行粒数进行正向选择，提高普×爆后代选系的产量。

Ear-kernel Characters of F3 Lines Derived from a Normal×Popcorn Cross and their Relationships with Popping Fold

The ear-kernel characters of 259 F3 lines derived from a normal cornxpopcorn cross and their relationships with popping fold were analyzed in two environments. The results showed that all ear -kernel characters of F3 lines were very high, and there were many lines with better ear -kernel characters than the popcorn inbred. The ear -kernel characters were quantitative in nature, controlled by many genes with small effects; ear-kernel weight and 100-kernel weight had bigger negative direct or indirect effect on popping fold;Row kernel number and ear length had positive direct effect on popping fold,other characters had indirect positive effect on expansion fold through row kernel number and ear length.So it might be effective to select on row kernel number and ear length directly to improve kernel yield of selected lines derived from normal cornxpopcorn crossws.