亚洲栽培稻起源、演化中两个重要稻种类型的研究

分布子云南及南亚的光稃稻和镰刀谷在研究亚洲栽培稻(O.sativa L.)的起源、演化及稻作育种上有重要意义。它们在分类上的地位往往被误分,进而影响这些类型的开发利用。研究表明,光稃稻是普通野生稻被引上亚洲的热带与亚热带山区在旱地上首先被人类驯化成的原始粳型陆稻,当其进一步被引向高海拔和高纬度时则演化成普通粳稻。镰刀谷迄今多被划为籼稻,我们的初步研究表明,镶刀谷大部分属粳稻,其中也包括一部分籼稻。它的起源及其分类上的地位尚待研究。

Studies on Two Important Rice Types Concerning the Origin and Differentiation of Asian Cultivated Rice

The nuda and sickle-like rice,growing in Yunnan province and South Asia have special significance in the study of the origin and differentiation of the Asian cultivated rice as well as in rice breeding.They are usually misclassified,hence leading to less utilization.Our research shows,the nuda rice may be the primitive upland keng type and domesticated under dry land condition from common wild rice when it was introduced to tropical and subtropical mountain regions.And then futher evolved into common keng type when it was introduced to high altitude and latitude.So far sickle type rices are usually classified as hsien type.Our studies,however,indicated that most of them belong to keng type with a small part to hsien type.The origin and the exact position in classification of the sickle rices remain to be futher studied.