部分水稻品种对稻瘟病菌群体的抗病性分析  

Analysis of Resistance to Magnaporthe grisea Populations in Some Rice Varieties

作　　者：袁洁[1] 杨学辉[1] 何海永[1] 

机构地区：[1]贵州省农业科学院植物保护研究所,贵阳550006

出　　处：《种子》2006年第8期14-16,21,共4页Seed

基　　金：贵州省科技攻关项目(黔科合2003NGY019)

摘　　要：利用生物间遗传学关于毒力频率和联合抗病性分析的方法,分析了16个品种对稻瘟病菌群体的抗瘟性。结果表明,参试病菌群体对各个品种的毒力以及不同稻区的病菌群体对同一品种的毒力均存在明显差异,筛选出毒力频率较低的4个品种:汕优多系1号、Ⅱ优多系1号、金优431和金优多系1号。用联合致病性系数和联合抗病性系数分析了品种搭配在生产上的应用前景。The resistance of sixteen rice varieties to Magnaporthe grisea populations was analyzed by using the inter-organismal genetics method about the virulence frequency and the analysis of the resistance association. The results showed that the virulence of pathogen populations varied from varieties and various regions. Four varieties with lower virulence frequency were picked out, which are Shanyouduoxi 1, Ⅱ youduoxi 1, Jinyou 431 and Jinyouduoxi 1 respectively. The utilization value of rice varieties, planted in pairs in fields, was analyzed with pathogenicity association coefficient and resistance association coefficient.

关 键 词：水稻 稻瘟病菌 毒力频率 联合致病性系数 联合抗病性系数 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治] S511[农业科学—植物保护]