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用双列杂交试验资料分析了甘蓝型油菜自交系两种配合力在Ｆ１ 代的表现，结果表明，杂种优势取决于双亲的配合力总效应；两种配合力对杂种优势的贡献都很大，尤以特殊配合力（ｓｃａ） 与Ｆ１ 表现的相关性更为密切，ｓｃａ 是形成杂种优势的主要原因。两种配合力效应间呈中等程度的正相关，配合力变化时ｓｃａ 的变化远大于一般配合力（ｇｃａ） 的变化。提高双亲配合力总效应的基础是提高ｇｃａ。优良的自交系配合力类型有４ 种，其中尤以高的ｇｃａ 和大的ｓｃａ 方差最佳。高产组合的亲本选择原则是：双亲的ｇｃａ 为中等以上（＾ｇｉ（ｊ） ≥中） ，至少有一亲本为高＾ｇｉ；双亲的ｓｃａ 方差为中等以上（＾Ｖｓ≥中） ，至少有一亲本为大。
The results showed that the heterosis was dependent on the total effect of parents’ combining ability. The contribution of the two combining ability to the heterosis was very large , Especially with the special combining ability (sca) and F1 performance more closely, sca is the main reason for the formation of heterosis. There was a moderate degree of positive correlation between the two combining ability effects. The change of sca in combining ability changed much more than that of the general combining ability (gca). The basis for improving the overall effect of parental co-ordination is to increase gca. There are four types of combining ability of excellent inbred lines, especially the highest gca and large sca variance. The parents of high-yielding combinations were selected as follows: the parents of the gca for medium (^ gi (j) ≥), at least one of the parents for the high ^ gi; parents sca variance above the medium (^ Vs ≥), at least one parent Big.