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湖南稻瘟病病菌群体遗传多样性研究
引用本文:刘二明,张志飞,罗峰,罗宽,杨静,朱有勇.湖南稻瘟病病菌群体遗传多样性研究[J].湖南农业大学学报(自然科学版),2002,28(5):391-394.
作者姓名:刘二明  张志飞  罗峰  罗宽  杨静  朱有勇
作者单位:1. 湖南亚华种业科学院,湖南,长沙,410011
2. 湖南农业大学植物保护学院,湖南,长沙,410128
3. 云南农业大学植物病理重点实验室,云南,昆明,650201
基金项目:亚华种业股份有限公司博士后基金资助项目
摘    要:为全面了解湖南稻瘟病菌群体遗传的多样性,为水稻育种和品种抗性基因的合理布局提供充分的理论依据,用Pot2 Rep-PCR对2001年采自并分离的湖南晚稻和一季稻41个品种的129个单孢菌株进行了DNA指纹分析结果表明,以72%相似水平,可将129个菌株分成4个谱系,24个单元型,优势谱系为L1和L3,它们分别拥有6个和15个单元型,其菌株数分别占总数的41.09%和46.51%。优势单元型为H5,H6和H17,分别占总菌株数的16.28%,16.28%和17.83%,研究揭示稻间病菌存在较大的变异潜能,稻瘟病菌的群体遗传多样性与特定地区水稻品种组成的多样性呈密切的正相关关系。

关 键 词:稻瘟病  群体遗传  稻瘟病菌  遗传多样性  DNA指纹  湖南
文章编号:1007-1032(2002)05-0391-04
修稿时间:2002年5月13日

On Diversity of Population Genetics of Magnaporthe grisea in Hunan
LIU Er-ming ,ZHANG Zhi-fei ,LUO Feng ,LUO Kuan ,YANG Jing ,ZHU You-yong.On Diversity of Population Genetics of Magnaporthe grisea in Hunan[J].Journal of Hunan Agricultural University,2002,28(5):391-394.
Authors:LIU Er-ming  ZHANG Zhi-fei  LUO Feng  LUO Kuan  YANG Jing  ZHU You-yong
Institution:LIU Er-ming 1,ZHANG Zhi-fei 2,LUO Feng 1,LUO Kuan 2,YANG Jing 3,ZHU You-yong 3
Abstract:A total of 129 monoconidial isolates of Magnaporthe grisea was collected and isolated from 41 rice cultivars or lines, which are late and single rice in Hunan. Each isolate was subjected to DNA fingerprinting analysis by Pot2 Rep-PCR. At 72% similarity level, these isolates can be grouped into 4 lineages,and composed of 24 haplotypes,as the result shows. Of these lineages, L1 and L3 were dominate lineages with 6 and 15 haplotypes,whose total 41.09% and 46.51% respectively. The dominate haplotypes were H5, H6 and H17 which covered 16.28%,16.28% and 17.83% of the total isolates separately.The study reveals that there is rather heterogeneous and potential variation in the blast pathogen, and a close positive relationship between genetic diversity of pathogen population structure and the diversity of cultivar constitutes.
Keywords:rice blast pathogen  genetic diversity  DNA fingerprinting  Hunan
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