小扁豆种质资源形态标记遗传多样性分析  

Phenotypic Diversity of Lentil(Lens culinaris Medik.) Germplasm Resources

作　　者：刘金[1] 关建平[1] 徐东旭 张晓艳[1] 顾竟[1] 宗绪晓[1] 

机构地区：[1]中国农业科学院作物科学研究所／农作物基因资源与基因改良国家重大科学工程,北京100081 [2]张家口市农业科学院作物所,张家口075131

出　　处：《植物遗传资源学报》2008年第2期173-179,共7页Journal of Plant Genetic Resources

基　　金：国家“十一五”科技支撑计划项目(2006BAD13B05,2006BAD02B08);科技部植物种质资源共享平台建设项目(2005DKA21001-06);农业部作物种质资源保护项目[NB07-2130135-(25-30)-13];农业行业专项(nyhyzx07-017);中澳政府间大型双边国际合作项目(ACIAR:CS1/2000/035)

摘　　要：选取国家种质库保存的481份小扁豆种质资源进行形态标记遗传多样性分析,表明14个形态性状的平均变异类型达8.79个,平均遗传多样性指数(I)为1.8149。16个不同地理来源群体间显示出显著的形态标记遗传多样性差异,国外群体的遗传多样性水平略高于国内群体。国内山西小扁豆种质资源的I值(1.573)仅次于I值最高的国外ICARDA群体(1.683)。研究结果显示,西北部省份是我国小扁豆资源遗传多样性最丰富的地区,应加强该区域小扁豆资源的进一步搜集、保护和研究。Structure群体遗传结构分析将481份参试资源划分为6大组群,各组群特征表现各异,变化丰富。A subcollection of 481 lentil germplasm resources, which makes up 57.6% of the total lentil collection in the National Gene Bank, was employed for phenotypic diversity analysis using 14 agronomic traits. High level of diversity was detected, with an average variation of 8.79 and an average Shannon-weaver index （I） of 1. 8149 based on morphological traits. The results indicated significant difference among the 16 groups of lentil Germplasm resources in phenotypic traits from diversed geographic origins. The highest I value （1.683） appeared within ICARDA accessions, followed by Shanxi accessions （I=1.573）. Further survey, conservation and study should be made for the lentil genetic resources in northwestern China, where existed the highest genetic diversity level. Population structure within the subcollection of 481 individuals has been defined, and 6 clusters were identified based on various phenotypic variations by using Structure 2.2 software.

关 键 词：小扁豆 种质资源 形态标记 遗传多样性 群体结构 

分 类 号：S643[农业科学—蔬菜学]