元阳3个长期连续栽培水稻地方品种内部遗传异质性分析  

Intra-varietal Genetic Heterogeneity of 3 Rice Landraces in Yuanyang

作　　者：高东[1] 杨木青[1] 李锐[1] 潘磊[1] 何霞红[1] 

机构地区：[1]云南农业大学/农业生物多样性应用技术国家工程中心/教育部农作物多样性与病害控制重点实验室/植物病理重点实验室,昆明650201

出　　处：《植物遗传资源学报》2012年第3期484-487,共4页Journal of Plant Genetic Resources

基　　金：国家"973"计划(2006CB100200;2011CB100400)

摘　　要：水稻地方品种是稻种资源的重要组成部分,遗传多样性十分丰富,具有推广改良品种所缺少或没有的优质种质,是水稻育种和稻种起源、进化研究不可缺少的过渡材料。目前,对水稻地方品种间遗传多样性研究较多,而对其内部异质性研究甚微。本研究用24对微卫星(SSR)引物对云南元阳梯田3个栽种历史悠久的水稻地方品种的内部遗传异质性进行了分析。共检测出117个等位基因,香农指数为红脚老粳居群(0.5911)>白脚老粳A居群(0.4875)>月亮谷居群(0.3070)。结果显示:3个地方品种的内部遗传异质性丰富,且遗传异质性主要得益于个体间,而非居群间。Rice landrace is the main part of resources in rice（Oryza sativa L.）.It has abundant genetic diversity and excellent characters that the current widely-planted variety has not.It is the indispensable resources to breed and study the origin and evolution of rice species.Inter-varietal genetic diversity were attended;however,intra-varietal genetic heterogeneity were not.Twenty-four SSR markers were used to evaluate the intra-varietal heterogeneity of 3 rice landraces that has been continuously planted generation to generation in Yuanyang terraces of Yunnan Province,China.A total of 117 SSR alleles were revealed,and the Shannon′s information index of 3 populations were Hongjiaolaojing（0.5911）Baijiaolaojing（0.4875）Yuelianggu（0.3070）.The results of this study showed that they have abundant intra-varietal heterogeneity in 3 rice landraces.The contribution rate of genetic heterogeneity among plants individual is higher than among populations.

关 键 词：水稻 微卫星标记 遗传异质性 梯田 地方品种 

分 类 号：S511[农业科学—作物学]