江西农业大学学报2012，Vol.34Issue(5)：886-892,7.
一组水稻种质资源的遗传相似性及群体结构分析
Genetic Similarity and Population Structure in a Rice Drought Stress Adaptation Panel
摘要
Abstract
The success of plant breeding is based on the availability of genetic variation. Understanding the population structure and range of diversity in available germplasm is fundamental for genetic improvement in all crop species. In this study, the authors analyzed the genetic diversity and the population structure of a drought stress adaptation panel (184 rice genotypes) through 156 SSR markers nearly evenly distributed across the rice genome at every 3 Mb bin. The results indicated that large range of genetic diversity existed among rice germplasms, while some accessions exhibited comparatively higher genetic similarity, such as IR designated varieties from IRRI and BP and PR designated varieties from PhilRice. The results of population structure of the 184 rice genotypes analyzed when K = 3 and K=7 through the mixed model of STRUCTURE indicated: population generally existed in the same type or rice subspecies; indica and japonica had relatively distinguishable population structure; derivatives of the same parents had significantly higher genetic similarity and were generally clustered into the same subpopulation and to various extents, genetic admixture existed within all the sub populations. The study on the genetic similarity and population structure of this rice drought stress adaptation panel provides valuable genetic information for further association mapping for drought tolerance and selecting parental lines for crop improvement.关键词
水稻/种质资源/遗传相似性/群体结构Key words
drought stress adaptation/ rice germplasm/ genetic similarity/ population structure分类
农业科技引用本文复制引用
肖宇龙,雷建国,余传元,Quirino D.Dela Cruz,Jonalyn M.Cstillo,Dindo A.Tabanao..一组水稻种质资源的遗传相似性及群体结构分析[J].江西农业大学学报,2012,34(5):886-892,7.基金项目
中菲合作杂交水稻育种项目(HBP-004-002) （HBP-004-002）
