Genetic Structure and Eco-Geographical Differentiation of Cultivated Keng Rice(Oryza sativa L.subsp.japonica) in China Revealed by Microsatellites  

作　　者：ZHANG Dong-ling WANG Mei-xing QIYong-wen SUN Jun-li WANG Feng-mei LI Jin-jie ZHANG Hong-liang ELI Zi-chao 

机构地区：[1]Key Laboratory of Crop Heterosis and Utilization, Ministry of Education/Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100193, P.R. China [2]Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, P.R.China [3]Guangzhou Sugarcane Industry Research Institute, Guangzhou 510316, P.R. China [4]Ministry of Agriculture, Beijing 100026, P.R. China

出　　处：《Journal of Integrative Agriculture》2012年第11期1755-1766,共12页农业科学学报（英文版）

基　　金：supported by the National Basic Research Program of China (2010CB125904,2004CB117201);the National Natural Science Foundation of China(30871506)

摘　　要：China is one of the largest centers of genetic diversity of Oryza sativa L. and is the original centers of Oryza sativa L. subspecies japonica. Using a genetically representative core collection of 1 442 rice landraces of japonica in China, the genetic structure, differentiation, and geographic diversity were analyzed. The model-based structure analysis on varieties within three ecotypes revealed 16 eco-geographical types, which are partially accorded with some of the ecological zones in China. The differentiation of eco-geographical types contributed to the local ecological adaption and physical isolation, and maybe could be used to develop the heterotic groups of japonica. To facilitate the identification of different ecotypes and eco-geographical types, we provided the SSR character alleles of each ecotype or geographical eco-group and a rapid discriminated method based on these character alleles. Lastly, investigation on genetic diversity, genetic differentiation indicated that southwest region of China, including south of Yunnan Province, northwest of Guangxi Zhuang Autonomous Region, and southwest of Guizhou Province, possessed the highest genetic diversity and all the necessary conditions as a center of genetic diversity and should be the center of genetic diversity of rice landraces of japonica in China.China is one of the largest centers of genetic diversity of Oryza sativa L. and is the original centers of Oryza sativa L. subspecies japonica. Using a genetically representative core collection of 1 442 rice landraces of japonica in China, the genetic structure, differentiation, and geographic diversity were analyzed. The model-based structure analysis on varieties within three ecotypes revealed 16 eco-geographical types, which are partially accorded with some of the ecological zones in China. The differentiation of eco-geographical types contributed to the local ecological adaption and physical isolation, and maybe could be used to develop the heterotic groups of japonica. To facilitate the identification of different ecotypes and eco-geographical types, we provided the SSR character alleles of each ecotype or geographical eco-group and a rapid discriminated method based on these character alleles. Lastly, investigation on genetic diversity, genetic differentiation indicated that southwest region of China, including south of Yunnan Province, northwest of Guangxi Zhuang Autonomous Region, and southwest of Guizhou Province, possessed the highest genetic diversity and all the necessary conditions as a center of genetic diversity and should be the center of genetic diversity of rice landraces of japonica in China.

关 键 词：japonica rice population structure eco-geographical differentiation China microsateltites 

分 类 号：S828.2[农业科学—畜牧学] Q959.468[农业科学—畜牧兽医]