水稻广亲和品种农艺性状的配合力分析

Analysis on the Combining Ability of Main Agronomic Traits of Rice Wide Compatible Varieties

用９个水稻不育系与３个广亲和品种进行不完全双列杂交，对其杂交组合１０个性状的配合力效应分析结果表明，就杂种Ｆ１主要农艺性状而言，亲本的一般配合力效应比组合特殊配合力效应更为重要；株高、单株有效穗数、穗长、每穗实粒数、结实率、单株粒重、千粒重等性状，以一般配合力作用为主，而每穗总粒数、生育期、着粒密度等性状虽以一般配合力作用为主，但特殊配合力的作用也不可忽视；株高、单株有效穗数、穗长、每穗实粒数。结实率、单株粒重等性状以广亲和品种的一般配合力作用为主；生育期、每穗总粒数、千粒重、着粒密度等性状以不育系的一般配合力作用为主。

A partial diallel cross including 9 rice male sterile lines as female parents and 3 wide compatible varieties as male parents was made to study combining ability for 10 characters of F1 hybrid. The main results were as follows: 1. The GCA ot parents played a more important role as compared with their SCA; 2. The GCA of parents played major role in 7 agronomic traits (grain weight per plant, 1000-grain weight, seed setting, grains per panicle, panicle length, panicles per plant and plant height) of F1 hybrids. Both the GCA and SCA of parents played an important role in 3 agronomic traits (total grains per panicle, days to heading and grains per 10cm panicle); 3. The effects of GCA of wide compatible varieties were important on 6 characters. The GCA of male sterile lines had major effect on 3 characters.