播种期对玉米籽粒大小及其生长特性的配合力的影响

本文利用一个双列杂交组的两个播种期试验,探讨了播种期对籽粒大小及其生长特性的表型值、配合力均方、配合力效应值相对大小以及籽粒大小与其生长特性的配合力效应相关程度的影响等问题。结果表明:在考察的十个性状中,八个性状的表型值在播期间存在着极显著的差异。只有一个性状的一般配合力均方和两个性状的特殊配合力均方在播期间的异质程度达到显著或极显著平准。八个性状的一般配合力效应相对大小和五个性状的特殊配合力效应相对大小在播期间的表现是基本一致的。籽粒大小与其生长特性的一般配合力效应相关和特殊配合力效应相关在播期间的差异均不显著。

EFFECT OF SOWING DATE ON THE COMBING ABILITY OF KERNEL SIZE AND ITS GROWTH CHARACTERSTICS IN CORN

The experiments involving two sowing dates were carried out on 28 F hybrids to explore the effect of sowing date on the phenotypic values, combining ability variances, relative size of combining ability effects of kernel size and its growth characteristics as well as the correlated degrees of comining ability effects between kernel size and its growth characteristics. The highly significant differences between the two dates were observed for phenotypic values of most characters. On the contrary, not any significant differences were observed for combining ability variances and relative size of combining. ability effects of most characters. The correlated degree of combining ability effects between kernel size and its growth characteristics showed no difference between two sowing dates.