东北粳稻群体结构和连锁不平衡分析  

Analysis of Population Structure and Linkage Disequilibrium for Japonica Rice in Northeast

作　　者：刘化龙[1] 郑洪亮[1] 赵宏伟[1] 王敬国[1] 孙健[1] 刘涛[1] 张艳梅[1] 邹德堂[1] 

机构地区：[1]东北农业大学水稻研究所,哈尔滨150030

出　　处：《分子植物育种》2013年第5期494-501,共8页Molecular Plant Breeding

基　　金：国家科技支撑项目(2011BAD16B11);黑龙江省十二五科技攻关项目(GA10B102-5)共同资助

摘　　要：为了利用关联分析发掘与重要农艺性状相关的数量性状基因位点,本研究采用全基因组扫描的方法,利用分布在基因组上的60对SSR引物,对140份东北三省水稻种质资源进行群体结构和连锁不平衡分析。结果表明:本研究中东北粳稻可分为2个类群,线性和非线性组合中,都有一定的连锁不平衡存在。群体中,19.2%的标记位点可以观察到显著的LD(P<0.05),其中第一类群和第二类群基于D'统计概率(P<0.05)支持的LD成对位点比例分别为2.1%和16.6%。第2类群连锁不平衡衰减(D'<0.5)所延伸的遗传距离变幅为0.32-120.4 cM,回归方程为:y=-0.0276ln(x)+0.3994。To discover quantitative trait loci related to important agronomic traits via association analysis, population structure and linkage disequilibrium （LD） of 140 rice germplasm resources from northeast provinces were analyzed with 60 SSR markers located on chromosomes in this study. The results indicated that the population of japonica rice in northeast could be classified into 2 groups, and LD in the linear and non-linear combination occurred commonly. 19.2% of the SSR loci pairs significantly showed LD at P〈0.05, where the sites based on D＇ linkage disequilibrium of group 1 and group 2 were 2.1% and 19.1%, respectively. LD of second group was found to decay across a range from 0.32 to 120.4 cM, and the regression equation was y=-0.02761n（x）＋0.3994.

关 键 词：粳稻 种质资源 群体结构 连锁不平衡 

分 类 号：S511.22[农业科学—作物学]