中国栽培稻的籼粳分化机理再论

Polarization mechanism of Indica and Japonica rice in China cultivated rice

综述前人在不同时期对栽培稻起源演化的代表性观点,并结合近年来对稻种籼粳分化机理的研究结果,重点研究了籼粳分化的机理并提出了自然选择与人工选择对籼粳分化的影响作用,其作用有三:一是确定籼粳分化的方向;二是积累和扩大籼粳分化的范围和程度;三是人工选择加上生态环境的自然选择的作用要明显大于单纯的自然选择。其结果可为进一步研究栽培稻的起源与演化和育种提供参考。

The paper has summarized the typical viewpoints of the origin and evolvement of cultivated rice in different periods. To study the polarization mechanism of Indica and Japonica rice and to have brought forward the natural select/on and the aritificial selection effect on Indica and Japonica rice polarization. Whose effect has three： to ascertain the direction of Indica and Japonica rice polarization fist. Tow is the range and degree of accumulating and expanding polarization of Indica and Japonica rice. Three is that artificial selection and the ecological environment natural selection effect needs obvious greater than simple natural selection. The results may provide a reference to study further the origin and evolvement of cultivated rice and breeding.