摘要： 从60条随机引物中选择12对组合,对玉米弯孢叶斑病菌基因组DNA进行随机扩增,共扩增出128条遗传标记。根据这些标记使用Statistic统计软件对菌株之间相互关系进行聚类分析,结果表明:菌株间最高相似系数是为87%,最低为47%。22个供试菌株在连锁距离0.4范围内全部聚在一起,树状图上的菌株可分成5~6组。a组包括:98-36、98-25、98-17、98-07、98-01和98-28 6个菌株,是遗传基础最接近的一组。

关键词: 玉米弯孢叶斑病菌, 致病性分化, DNA, 多态性

Abstract: One hundred and twenty -eight piece of belt signs are multiplied through selecting 12 pairs of associationsform 60 piece of random decoy and multiplying Curvularia lunata randomly.According to the signs,pathogen's mutual relationsare analyzed.The result is that the highest similarity degree of the pathogen is 87 % and the lowest is 47 %.Twenty-two experimental pathogen all gather together by all stems on 0.4 to the stem in the linked together.The pathogenforming tree shape can be divided into 5 or 6 groups.Group a consists of 6 pathogen,they are 98 -36,98 -25,98 -17 ,98 -07,98 -01 and 98 -28 ,which is the most approximate one on heredity base.

Key words: Curvularalunata, Pathogenicitydifferentiation, DNA, Muchappearancesofheredity

中图分类号: 

• S435.131