Method: The gray correlation analysis and example analysis were used.
方法：灰色关联分析法、实例分析法。
The gray correlation analysis is more reasonable compared with single trait variance analysis and is more accurate for evaluation of the performance of tobacco varieties entered the variety test.
灰色关联度方法较单一性状的方差分析更为合理，可准确评价烤烟区试品种的优劣。
Using gray correlation analysis method, the effect of climatic factors on rice quality was researched.
采用灰色关联分析的方法，研究了气候因子对稻米品质的影响。
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