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

被引：0
作者：
QI YongwenZHANG Dongling ZHANG Hongliang WANG MeixingSUN JunliWEI Xinghua QIU ZongenTANG ShengxiangCAO Yongsheng WANG Xiangkun LI Zichao Key Laboratory of Crop Genomics and Genetic Improvement of Ministry of Agricultureand Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University Beijing ChinaChina National Rice Research Institute Hangzhou ChinaInstitute of Crop Science Chinese Academy of Agricultural Science Beijing China [1 ,1 ,1 ,1 ,1 ,2 ,3 ,2 ,3 ,1 ,1 ,1 ,100094 ,2 ,310006 ,3 ,100081 ]
机构：
来源：
Chinese Science Bulletin | 2006年 / 06期
关键词：
rice {Oryza sativa L.); cultivars; genetic diversity; mi-crosatellite; phenotypic traits;
D O I：
暂无
中图分类号：
S511 [稻];
学科分类号：
0901 ;
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.
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页码：681 / 688
页数：8
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