福建省致病疫霉菌SRAP遗传多样性分析  

Analysis on Genetic Diversity of Phytophthora infestans Based on SRAP in Fujian Province

作　　者：兰成忠[1] 李本金[1] 陈庆河[1] 翁启勇[1] 

机构地区：[1]福建省农业科学院植物保护研究所,福州350013

出　　处：《中国农学通报》2011年第9期395-399,共5页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金项目(30600401;30971892);福建省自然科学基金(2009J01098);福建省属公益类科研院所基本科研专项(2010R1026-5)

摘　　要：为了解福建省致病疫霉菌的群体遗传结构,为该病原菌的遗传进化提供理论依据,笔者应用SRAP分子标记技术对福建省致病疫霉菌的群体遗传多样性,及不同地区菌株间的关系进行比较分析。利用10个菌株从110对引物组合中筛选出多态性引物10对,对分离自福建省10个不同市(县)的62个致病疫霉菌菌株DNA进行PCR扩增,共产生92条谱带,其中多态性标记90条,多态检测率为97.8%。利用NTSYpc Version2.1软件对供试菌株间的遗传距离进行聚类分析并构建系统树状图。以遗传距离0.57为阈值,可将供试62个菌株划分为4个遗传聚类组,SRAP分组与菌株的地理来源、寄主均无明显相关性。聚类分析结果表明,福建省不同地区的致病疫霉菌整体亲缘关系相近,但各菌株间存在遗传差异。In order to learn the genetic structure of Phytophthora infestans in Fujian province and provide a theoretical basis for genetic evolution of this pathogen.Sequence related amplified polymorphism（SRAP） analysis was used to detect the genetic variation in populations of Phytophthora infestans in Fujian province.Among 110 combinations of primer pairs screened,10 primer pairs that amplified consistent polymorphic bands with DNA of 10 isolates were generated.They were further applied to amplify the genomic DNA of 62 isolates collected from different areas and hosts in Fujian province.In total,92 SRAP markers were obtained.Among the bands,90 were polymorphic,which accounted for 97.8%.Based on the genetic distance,a dendrogram was constructed with the software NTSYSpc Version2.1.At genetic distance of 0.57,62 isolates were divided into 4 SRAP groups.There was no correlation between SRAP group and the geographic origin or their hosts.The analysis showed that some strains from one area closely related to that from another area.Nonetheless,rich genetic variation existed among the tested strains in Fujian province.

关 键 词：致病疫霉菌 晚疫病 SRAP 遗传多样性 

分 类 号：S435.32[农业科学—农业昆虫与害虫防治]