稻瘟病菌群体遗传宗谱组成与水稻品种布局的相关性分析  

Relationship of genetic lineages of Magnapothe grisea and rice variety deployment

作　　者：杨学辉[1] 袁洁[1] 何海永[1] 王云月[2] 

机构地区：[1]贵州省农业科学院植物保护研究所,贵州贵阳550006 [2]云南农业大学农业生物多样性应用技术国家工程研究中心,云南昆明650201

出　　处：《南京农业大学学报》2009年第2期56-60,共5页Journal of Nanjing Agricultural University

基　　金：贵州省科学技术基金项目(黔科合计(2004)3070号);贵州省年度攻关项目(2003NGY019);贵州省农科院院专项项目(院(2006))021);贵州省科技厅带帽项目(黔科合带帽字(2007)5003)

摘　　要：采用Rep-PCR分子指纹对来自贵州的200个稻瘟病菌菌株进行了群体遗传结构分析。结果表明,在0.83遗传相似水平下,供试菌株被划分为87个单元型,17个宗谱;同时,病菌群体遗传宗谱的组成与各地区水稻品种的布局有极大的相关性。以杂交稻为主栽品种的几个地区,如遵义、黔东南、黔西南等,稻瘟病菌群体的遗传宗谱相对单一,且多为优势宗谱GZL17;以地方品种或粳稻为主栽品种的地区,如六盘水和毕节,稻瘟病菌群体的遗传宗谱较为分散,各个宗谱所占的比例相对均匀,没有优势或次优势宗谱,显示出丰富的遗传多样性。因此,大面积种植杂交水稻可促使稻瘟病菌群体的遗传背景趋于一致,增加稻瘟病的成灾风险。Two hundred isolates of rice blast fungus collected from Guizhou Province of China were analyzed for genetic structure by using Rep-PCR fingerprinting technique. The result showed that there were 87 different haplotypes and 17 genetic lineages at 0. 83 similar linkage distance level. Meanwhile, it was remarkable that the genetic lineages of Magnapothe grisea population were correlated with the distribution of rice varieties in different areas of the province. In some areas like Zunyi, Qiandongnan, Qianxinan, where hybrid rice were the most popular varieties grown by farmers, the genetic lineages of M. grisea was relatively simple and most of them were predominant lineages. In those where traditional varieties and japonica rice were popular just like Liupanshui and Bijie, the genetic lineages of M. grisea were more diverse and the proportion of different lineages showed less difference. No predominant or hyper-predominant lineages were present. These results showed that the M. grisea population in Guizhou Province was abundant in genetic diversity. Therefore, hybrid rice grown in a large scale would make the genetic background of M. grisea population become homogenous and may increase risk of rice blast disaster.

关 键 词：稻瘟病菌 遗传宗谱 水稻品种布局 相关性 

分 类 号：S511[农业科学—作物学]