利用通径分析研究了玉米籽粒几个物理性状与粒重的关系,通过配合力分析研究了它们的遗传。结果表明,粒重主要取决于粒宽,其次才取决于粒长和粒厚。粒宽、粒长、粒厚主要受加性基因效应的控制。因此,通过亲本选择改良籽粒体积,可以增加玉米的产量。 Path analysis was used to study the relationship between several physical traits and grain weight of maize kernels, and their inheritance was studied by combining ability analysis. The results show that the grain weight depends mainly on the grain width, and secondly on the grain length and grain thickness. Grain width, grain length, grain thickness are mainly controlled by additive gene effect. Therefore, corn yield can be increased by the parents choosing to improve the grain size.