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本文利用灰色关联分析、逐步判别分析、单一性状分类、主成份分析４种方法探讨了亚洲栽培稻分类时程氏和冈氏所用分类性状的地位和作用。结果表明，将亚洲栽培稻分为籼、粳两亚种时，抽穗时稃色是最重要也是田间较易鉴别的性状，它的关联度、符合系数、共同度、负荷量的累计值均居第一位，其次为叶毛和苯酚反应；若将其分为籼、偏籼、中间、偏粳、粳五类，抽穗时稃色在分类上的重要性仍处于第一位，其次为苯酚反应，再次是稃尖茸毛。两种分类法均认为耐冷性和ＫＣＩＯ３抗性的作用较小。
In this paper, we use gray correlation analysis, stepwise discriminant analysis, single trait classification and principal component analysis to study the status and function of the taxonomic characters of Cheng’s and Gang’s in Asian rice cultivars. The results showed that when Asian cultivated rice was divided into indica and japonica subspecies, it was the most important and the more easily identifiable trait at heading, and its correlation degree, coincidence coefficient, common degree and the cumulative value of load averaged First, followed by leaf hair and phenol reaction; if it is divided into indica, indica, indica, middle, partial japonica, japonica five categories, heading at the time of the classification of the importance is still in the first place, followed by phenol Reaction, again is sharp hair. Both taxonomists agree that cold tolerance and KCIO3 resistance are less effective.