【摘要】 利用Pot2 rep PCR技术分析了 2 0 0 0及 2 0 0 1年采自江苏省五大稻区稻瘟病菌的DNA指纹。单元型和系谱分析结果表明 :稻瘟病菌在DNA水平上具有很高的多态性 ;不同的年份及地区间稻瘟病菌的群体结构存在明显差异 ,但也有部分菌株属于相同系谱甚至同一单元型 ,而JSL17是各稻区均有分布的优势系谱 ;来自不同地区、相同寄主品种的菌株有相似的遗传背景 ,说明寄主品种的遗传背景在病菌进化的变异中起着重要的作用。更多还原

【Abstract】 DNA fingerprint haplotypes and lineages of rice blast pathogen(Magnaporthe grisea)from Jiangsu in 2000 and 2001 were studied by Pot2-rep-PCR method.The results showed highly polymorphism of DNA fingerprints in tested isolates of M.grisea.The isolates were divided into 17 genetic lineages of M.grisea,in which JSL17 is dominant.Population structure of M.grisea lineages varied between years and among different rice-planted regions of Jiangsu.It is inferred that genetic background of rice varieties and their evolution is the main cause leading to variation and diversity in M.grisea.更多还原