Genetic structure and diversity of Oryza sativa L. in Guizhou,China

查看全文 作　　者：ZHANG [1]DongLing;ZHANG [1]HongLiang;WEI [2]XingHua;QI [1]YongWen;WANG [1]Meixing;SUN [1]JunLi;DING [3]Li;TANG [2]ShengXiang;QIU Zong'[3]En;CAO [3]YongSheng;WANG [1]XiangKun;LI [1]ZiChao

机构地区：[1]Key Laboratory of Crop Genomics and Genetic Improvement of Ministry of Agriculture, Key Laboratory of Crop Heterosis and Utilizition of Ministry of Education and Beijing Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100094, China;[2]China National Rice Research Institute, Hangzhou 310006, China;[3]Institute of Crop Science, Chinese Academy of Agricuiturel Science, Beijing 100081, China

出　　处：《Chinese Science Bulletin》索引2007年第52卷第3期,共9页

基　　金：the National Basic Research Program of China ('973' Program) (Grant No. 2004CB117201);the Key Technologies R&D Programme of China (Grant No. 2004BA525B02-05) 摘　　要：Preserving many kinds of rice resources and rich variations, Guizhou Province is one of the districts with the highest genetic diversity of cultivated rice (Oryza sativa L.) in China. In the current research, genetic diversity and structure of 537 accessions of cultivated rice from Guizhou were studied using 36 microsatellite markers and 39 phenotypic characters. The results showed that the model-based genetic structure was the same as genetic-distance-based one using SSRs but somewhat different from the documented classification (mainly based on phenotype) of two subspecies. The accessions being classified into indica by phenotype but japonica by genetic structure were much more than that being classified into japonica by phenotype but indica by genetic structure. Like Ding Ying’s taxonomic sys- tem of cultivated rice, the subspecific differentiation was the most distinct differentiation within culti- vated rice. But the differentiation within indica or japonica population was different: japonica presented clearer differentiation between soil-watery ecotypes than indica, and indica presented clearer differen- tiation between seasonal ecotypes than japonica. Cultivated rices in Guizhou revealed high genetic diversity at both DNA and phenotypic levels. Possessing the highest genetic diversity and all the nec- essary conditions as a center of genetic diversity, region Southwestern of Guizhou was suggested as the center of genetic diversity of O. sativa L. from Guizhou. 关键词：贵州水稻遗传结构遗传多态性表型特征

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Genetic structure and diversity of Oryza sativa L. in Guizhou,China

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