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采用程侃声（１９９３）亚洲稻籼粳鉴别方法对２０００多份普通野生稻（Ｏ．ｒｕｆｉｐｏｇｏｎ）进行籼粳分化探讨。结果表明，普通野生稻的不同生态型在叶毛等６项性状上已有不同程度的籼粳分化。对同一性状，在野生稻不同生态型中的籼粳分化程度不同。叶毛等性状，在同一植株上不同时期也存在籼粳表型差异。因此认为普通栽培稻（Ｏ．ｓａｔｉｖａ）籼粳亚种同时起源于野生稻的可能性值得研究。
Using Cheng Kan-Sheng (1993) Identification of Indica-Japonica Differentiation of More than 2000 O. rufipogon Strains in Asia by Indica Rice-japonica Differentiation Method. The results showed that the indica-japonica differentiation of different ecotypes of Oryza rufipogon had different degrees in six traits of leaf hair. For the same trait, different degrees of indica and japonica differentiation were observed in different ecotypes of wild rice. Leaf hair and other traits, in the same plant at different times there are indica japonica phenotypic differences. Therefore, it is considered that the possibility of O. sativa indica-japonica subspecies originating from wild rice at the same time is worth studying.