5个玉米人工合成群体的配合力分析

以五个玉米人工合成群体与9个测验种所配制的组合为供试材料,以小区均数为单位,将两季均数按不完全双列杂交模型对五个群体配合力进行了分析,结果表明,群体GP-5和GP-3主要产量性状及其GCA表现较好,优良个体出现频率较高,具有较大改良利用潜势;群体GP-4虽主要产量性状均值偏低,GCA正向效应值偏小,但植株较矮,穗位较低,通过GCA改良和SCA选择有一定利用前景;群体GP-1和GP-2植株穗位偏高,主要产量性状的GCA均为负值,育种潜力不大。

Combining Ability Analysis for Five Synthesized Corn Populations

In the present experiment,analysis of combing ability for the traits with significant variations over two seasons showed that GP-3 and GP-5 are appropriate in plant height and ear height,with higher traits means,better general combining ability,greater frequencies of elite individuals.They were proved to have a better breeding potentiality.GP-4 is lower in means of major yield traits,with a positive GCA,a lower plant height and ear height,.It may also have potentiality for exploitation in breeding through improvement of GCA and SCA selection.GP-1 and GP-2 showed higher plant height and ear height,with a negative GCA in major traits and a lower coenobium frequency compared with the check variety,so they seemed to have less breeding potentiality.