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园艺学报 ›› 2007, Vol. 34 ›› Issue (4): 935-940.

• 蔬菜 • 上一篇    下一篇

黑木耳栽培菌株的ISSR分析

李辉平; 黄晨阳;陈 强;张金霞*

  

  1. (中国农业科学院农业资源与农业区划研究所, 北京100081)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-08-25 发布日期:2007-08-25

ISSR Analysis of Cultiva ted Auricularia auricula

LI Hui-ping;HUANG Chen-yang;CHEN Qiang;ZHANG Jin-xia*
  

  1. ( Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-08-25 Published:2007-08-25

摘要: 应用锚定ISSR技术对21个栽培黑木耳(Auricularia auricula) 菌株进行了遗传多样性研究。
从20个引物中选出10个ISSR引物, 扩增得到185个扩增位点, 大小分布在200~3 000 bp之间, 其中多态
性位点181个, 多态性位点占97.84% , 表明ISSR标记的多态性非常高。平均每个位点的观察等位基因数
(Na) 为1.9784, 每个位点的有效等位基因数(Ne) 为1.2396; 菌株间平均Nei基因多样性( h ) 为
0.2732, Shannon信息指数( I) 为0.4278。Nei (1972) 遗传距离矩阵分析表明21个黑木耳菌株间遗传距
离在0.36到0.55之间, 基因流(Nm ) 达到2.7528, 表明我国栽培黑木耳的遗传背景十分丰富, 遗传多样
性很高, 同时表明我国各地域间栽培黑木耳菌株存在着很大的菌种交流。

关键词: ISSR, 胶质菌, 遗传多样性, 遗传标记

Abstract: Genetic diversity was assessed in 21 cultivated strains of A. auricula by ISSR ( inter simple
sequence repeats). Ten primerswere screened out from twenty ISSR primers in this study. One hundred and
eighty five loci were produced from the primers, of which 181 loci (97.84% ) were polymorphic in the organism. The size of these loci ranged from 200 bp to 3 000 bp. High genetic diversity of A. auricula in China was
detected: the observed number of alleles (Na) averaged 1.9784 and the effective number of alleles (Ne) was
1.2396, for every locus; Neips genetic diversity ( h) was estimated to be 0.2732, while Shannonps information index ( I) was 0.4278, on average1 The Neips ( 1972) genetic distance among strains ranged from 0.36 to
0.55, but the gene flow (Nm ) was 2.7528. Analysis showed that there were high genetic diversity and large
spawns exchange among p rovinces for A. auricula in China.

Key words: ISSR, Jelly fungus, Genetic diversity, Genetic marker