Genetic diversity of rice cultivars (Oryza sativa L.) in China and the temporal trends in recent fifty years

查看全文 作　　者：QI [1]Yonawen;ZHANG [1]Dongling;ZHANG [1]Hongliang;WANG [1]Meixing;SUN [1]Junli;WEI [2]Xinghua;QIU [3]Zongen;TANG [2]Shengxiang;CAO [3]Yongsheng;WANG [1]Xiangkun;LI [1]Zichao 机构地区：[1]Key Laboratory of Crop Genomics and Genetic Improvement of Min- istry of Agriculture, and Beijing Key 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 Agricultural Science,Beijing 100081, China 出　　处：《Chinese Science Bulletin》索引2006年第51卷第6期,共8页 摘　　要：To understand geographical distribution of the genetic diversity of rice cultivars {Oryza sativa L.) and its trends in recent fifty years in China, 453 ’ accessions were analyzed by 36 microsatellites loci and 42 phenotypic traits. Results revealed that the genetic diversity by SSRs is highly consistent with that by phenotypic traits and the genetic diversity of indica cultivars was higher than that of japonica cultivars; the genetic diversity of cultivars declined from 1950s to 1980s and then increased greatly; among the six rice ecological zones (REZs), genetic diversity of REZTl was the highest and those of REZV and REZVT were the lowest at both DNA and phenotypic level. Jiangsu and Jiangxi provinces in the middle and lower reaches of Yangtze River and Sichuan province in southwest of China were the areas with the highest genetic diversity. Breeders in REZV which is an important japonica rice area but with very low genetic diversity should explore more gene resources to widen the genetic backgrounds of cultivars. 关 键 词：中国 水稻种植 遗传多样性 微卫星标记 表型