2个玉米人工合成群体S2主要性状的配合力分析

以48-2,9636,RP125为测验种,采用不完全双列杂交设计,对2个玉米人工合成群体S260个单株的配合力进行研究,以分析不同群体自交后代间、群体内S2株系间、株系内个体间配合力差异。结果表明,除株高、穗位高、行粒数外,其余性状GP-5 S2GCA优于GP-4 S2,多数性状群体内S2株系间GCA具有较大差异,株系内个体间经济性状GCA的差异远远大于农艺性状;不同性状及同一性状不同群体自交后代所配组合SCA效应值达显著或极显著差异的数目均有一定差异,且GCA与SCA无明显相关关系。55,57,89,93,105,107株系多数性状具有较高的GCA,可能有较大利用潜势。

Combining Ability of Major Traits in the S2 of 2 Synthetic Maize Populations

In the present study,180 combinations derived from crosses of 60 individuals from the S2 of 2 synthetic maize populations and 3 testers were used with incomplete diallel cross design,to analyze the combining ability between the inbred progenies of different populations.The results of GCA showed that GP-5 S2 were better than GP-4 S2 in most traits except plant height,ear height,kernels per row.Most of the traits was much variance among different strains in the same population,and the variance among different individuals in the same strain in economic traits was much more than in agronomic traits.The results of SCA showed that there were different hybrid numbers of SCA effect significant difference at 0.05 or 0.01 level among different traits,and the same results was in the same traits in different S2 of populations,there was also no obvious relationship between GCA and SCA.The strains including 55,57,89,93,105,107 exhibited a better GCA potentiality.