浙江太湖稻区稻瘟病菌生理小种变化及毒性分析  

CHANGES OF PATHOGENIC RACES AND VIRULENCE OF PYRICULARIA GRISEA IN TAIHU LAKES RICE REGION OF ZHEJIANG PROVINCE

作　　者：柴荣耀[1] 金敏忠[1] 

机构地区：[1]浙江省农业科学院植物保护研究所

出　　处：《西南农业大学学报（自然科学版）》1998年第5期497-502,共6页Journal of Southwest Agricultural University

基　　金："九五"国家重大科技攻关计划资助

摘　　要：】１９９１～１９９６年，从浙江太湖稻区８个县（市）的稻瘟病标样中分离到４８８个有效单孢菌株，经７个中国稻瘟病菌鉴别品种鉴定，共鉴定出７群１８个小种。其中，ＺＤ，ＺＡ，ＺＥ群为优势种群，出现频率分别为３９．３４％，２７．２５％和２４．８０％，优势小种为ＺＤ３，ＺＥ３，ＺＡ４９，ＺＤ１。主栽品种上的小种组成较为复杂，但主要小种与整个稻区的优势小种基本一致，小种与品种之间存在着特定的亲和性关系。病菌对该稻区已被更换或正在被更换的品种的毒力频率较高，对新育成和推广的秀水１７、秀水９３－６３等品种的毒力较弱。病菌小种类型和结构随着栽培品种的更换而发生较大的变化，反映了病原菌与寄主品种的协同进化关系。During 1991～1996, 488 monoconidial isolates of Pyricularia grisea were collected from 8 counties (or cities) in Taihu rice region of Zhejiang Province. The isolates were assessed on 7 Chinese differential varieties, and 18 races of 7 groups were identified. Among them, group ZD, ZA and ZE were predominant groups. The predominant races were ZD 3, ZE 3, ZA 49 and ZD 1. The population of races isolated from major varieties were complex. The main races isolated from major varieties were coincident with the predominant races in the whole rice region. There was specificity in the race variety interaction. Race evolution and virulence of P.grisea were studied. The evolution was present between host(rice) and epidemic strains ( P.grisea ).

关 键 词：稻瘟病菌 小种 毒性 生理变化 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]