基于玉米重组自交系生育期的相关性状分析

Analysis of Flowering-Related Traits in Maize(Zea mays L.) Using RIL Population

本试验以K12为母本、黄早四为父本,以单粒传法构建重组自交系(Recombinant inbred line,RIL)分离群体为供试材料,通过对抽雄、散粉,吐丝等花期性状的考察,分析RIL群体对两亲本的改良效果,以期为玉米群体后续研究、花期协调性评价、RIL群体表型变异以及玉米生育期相关性状的QTL定位和分子标记辅助育种提供依据。结果表明:RIL群体的抽雄、散粉,吐丝等花期性状均有不同程度的改变,且达到了较好的相关效果。多数性状的表型变异系数在群体内有不同程度的增加,符合RIL群体的特点。频率分布符合正态分布,RIL群体可用于进一步QTL定位及相关基础研究。

In this paper,162 RIL families derived from K12×Huangzaosi population were applied to analysis the improvement effect of the Parents based on the five flower-related traits（i.e. tasseling,anthesising,silking,ASI and TAI） of maize,to provide references for related basic research,florescence coordination,phenotype variation in RIL population,QTL location of flower-related traits and marker-assisted breeding in maize. The results indicated that these flower-related traits had different degrees of change and obtained the good effect.Most coefficients of phenotypic variation within populations had different degrees of increase,In accordance with the characteristics of RIL population. Frequency distribution were consistent with normal distribution,It was indicated that the RIL population were suitable to as the mapping population for QTL location and related basic research in maize.