云南水稻抗白叶枯病品种的遗传多样性初报  

Genetic Diversity of Rice Cultivars Resistant to Bacterial Blight in Yunnan

作　　者：姬广海[1] 钱君[1] 张世光[1] 魏兰芳[1] 陈兴全[1] 

机构地区：[1]云南农业大学云南省植物病理重点实验室,云南昆明650201

出　　处：《中国水稻科学》2003年第2期118-122,共5页Chinese Journal of Rice Science

基　　金：国家自然科学基金资助项目 ( 3 0 160 0 5 2 ) ;国家 863计划资助项目 ( 2 0 0 2 AA2 45 0 41)

摘　　要：利用 RAPD技术 ,从 90个 RAPD引物中筛选出 2 0个引物 ,通过 PCR扩增 ,对 5 3份抗白叶枯病水稻品种进行遗传多样性分析。结果表明 ,供试的水稻品种间遗传分化明显 ,具有丰富的遗传多态性。经聚类分析可知 ,抗病品种与感病品种遗传差异很大 ,很容易区分开 ,在遗传距离为 0 .2时 ,测试的 5 1个抗白叶枯病水稻品种可分为 13个遗传相似组 ,其中 1、2、5组为主要主群 ,分别包括 8个、17个和 9个品种。The genetic diversity was analysed in 53 rice cultivars with resistance to bacterial blight by RAPD. Twenty random primers were selected from 90 ones screened. Results showed that these cultivars exhibited extensive genetic variability and abundant genetic diversity. Cluster analysis based on DNA data revealed that there were significant differences between the resistant and susceptible cultivars. Fifty one of them could be divided into 13 groups, Group 1,2, and 5 were predominant, including 8,17, and 9 cultivars, respectively. Thus the genetic characteristics of rice clusters showed bacterial blight resistance, it may be useful in rice breeding for developing resistant cultivars to control the disease.

关 键 词：水稻 白叶枯病 遗传多样性 抗性 随机扩增多态性DNA 

分 类 号：S435.11[农业科学—农业昆虫与害虫防治]