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试用灰色系统理论关联度法对贵州省农科所油料所近年来选育的11个甘蓝型杂交油菜新组合进行单位面积的油菜籽产量等7个主要农艺性状的灰色关联度分析。分析结果表明：不同的杂交油菜组合同一性状与产量的关联度不同；同一组合内的不同农艺性状与产量的关联度也不同。其关联度顺序为：单株产量（r1=09067）＞株高（r2=0．8398）＞林有效分枝数（r3=0.7892）＞用粒数（r5=0．7237）＞林有效角果数（r4=0．4276）＞千粒重（r6=0．3767）。在甘蓝型杂交油菜的组合选育过程中，应注重选择单株生产力高、株高适度、单株有效分枝多的组合，同时要求所选择的组会角粒数，株有效角果数多。千粒重对同一组合材料是相对稳定的，变化幅度小，在育种过程中对千粒重的选择效果不明显。
The gray correlation analysis of seven major agronomic traits, such as rapeseed yield per unit area, was conducted on a new combination of 11 new rapeseed (Brassica napus L.) cultivars bred in recent years by the Institute of Oil Crops, Guizhou Provincial Institute of Geography. The results showed that the correlations between the same traits and yield of different hybrid rape cultivars were different. The correlations of different agronomic traits and yield within the same combinations were also different. (R1 = 09067)> plant height (r2 = 0.8398)> number of effective branches (r3 = 0.7892)> number of grains (r5 = 0.7237)> effective angle Fruit number (r4 = 0.4276)> 1000-grain weight (r6 = 0.3767). In the process of combinatorial breeding of Brassica napus, we should pay attention to the selection of a combination of high productivity, moderate plant height and effective branches per plant. At the same time, we should select the number of grains and effective pods . The 1000-grain weight is relatively stable to the same combination of materials, with a small variation range. The effect of selecting 1000-grain weight during breeding is not obvious.