关键词: 普通野生稻, 微卫星, 遗传多样性, 地理特征

Abstract:

【Objective】 To estimate the genetic diversity of the populations of wild rice (O. rufipogon Griff) in the whole region of Guangxi Zhuang Autonomous Region and reveal their geographically distribution characteristics. 【Method】 Thirty-six SSR loci distributed on the twelve chromosomes of rice were used to study the genetic diversity of 690 wild rice individuals of 27 natural populations from 14 regions in Guangxi. 【Result】 The mean number of allele (A) was 9.86 and the effective number of allele(Ae) was 5.05. The total genetic diversity (Ht) was 0.74 and the coefficient of genetic differentiation (Gst) was 0.49, which means that the populations of O. rufipogon in Guangxi has abundant genetic diversity and the genetic variability among and between the populations has the same contribution to the total diversity. The analysis of clusters showed that all the samples could be clustered into 3 groups at the coefficient of 0.5, and each group has its own geographic characteristics. 【Conclusion】 O. rufipogon populations in the whole region of Guangxi was not only rich in genetic diversity, but also has close relationship with their geographical conditions like mountains, water systems and geology.

Key words: Orazy rufipogon, microsatellite, genetic diversity, geographical characters