中国核桃8个天然居群遗传多样性分析  

SSR Analysis of Genetic Diversity of Eight Natural Walnut Populations in China

作　　者：王滑[1] 郝俊民[1] 王宝庆[1,2] 裴东[1] 

机构地区：[1]中国林业科学研究院林业研究所国家林业局森林培育重点实验室 [2]内蒙古农业大学林学院呼和浩特010019

出　　处：《林业科学》2007年第7期120-124,共5页Scientia Silvae Sinicae

基　　金：国家自然科学基金资助项目(30671436;30370234);林业科技支撑计划(2006BAD01A17)。

摘　　要：Eight Juglans populations (4 populations of J. sigillata and 4 of J. regia), which are distributed in Yunnan, Sichuan, Henan, and Shanxi Province, were selected to investigate their genetic structure and diversity using 8 microsatellite loci. A moderate level of genetic diversity was observed at population level by the total 71 of alleles. The mean expected heterozygosity (H_e) of all populations was 0.618. The proportion of genetic differentiation among populations accounted for 19.6% of the whole diversity, and the gene flow between populations (N_m) was 1.02. The result of UPGMA clustering indicated that the populations were congregated according to their geographic distances instead of tree species.Eight Juglans populations （4 populations of J. sigillata and 4 of J. regia）, which are distributed in Yunnan, Sichuan, Henan, and Shanxi Province, were selected to investigate their genetic structure and diversity using 8 microsatellite loci. A moderate level of genetic diversity was observed at population level by the total 71 of alleles. The mean expected heterozygosity （He） of all populations was 0.618. The proportion of genetic differentiation among populations accounted for 19.6% of the whole diversity, and the gene flow between populations （Nm） was 1.02. The result of UPGMA clustering indicated that the populations were congregated according to their geographic distances instead of tree species.

关 键 词：铁核桃 核桃 SSR 遗传多样性 遗传分化 

分 类 号：S718.46[农业科学—林学]