玉米灰斑病菌致病性分化研究  

Pathogenic Differentiation of Gray Leaf Spot Pathogen in Maize

作　　者：王桂清[1] 陈捷[2] 

机构地区：[1]聊城大学农学院,山东聊城252059 [2]上海交通大学农业与生物学院,上海201101

出　　处：《华北农学报》2006年第3期100-104,共5页Acta Agriculturae Boreali-Sinica

基　　金：国家"十五"攻关项目(2001BA509B05)

摘　　要：从我国玉米品种资源中首次成功筛选出9个具有广泛血缘代表性的自交系,即沈137,78599-1,Mo17,478,C8605-2,E28,598,Va35,K12,作为玉米灰斑病菌的生理分化鉴别寄主;8个主栽品种,即沈试29,沈试31,铁单9,掖单13,丹413,丹玉18,沈农87,东单54,作为辅助鉴别寄主,从而确定了玉米灰斑病菌生理分化鉴别寄主体系。采用田间成株期鉴定,高粱粒灌心法进行接种,根据在鉴别寄主上的发病等级,将采自北方玉米主产区的23个玉米灰斑病菌菌株划分成5个致病类型。研究表明,我国玉米灰斑病菌存在一定程度的致病性分化,通过病级评价可将23个玉米灰斑病菌菌株分成5个致病类型,其中致病类型I为强致病类型,致病类型IV为弱致病类型,Ⅱ,Ⅲ2组致病类型介于两者之间,而致病类型V属于不确定类型。研究结果为我国玉米品种抗性鉴定、灰斑病流行监测和品种合理布局提供了理论依据。A set of maize inbreds or cultivars were firstly screened as GLS（ Cercospora zeae-maydis）pathogen differential hosts with genetic background which current cultivars shared in China, such as inbreds Shen137, 78599-1, Mo17, 748, C8605-2, E28, 598, Va35, K12 were identified as major ones, and cultivars Shenshi29, Shenshi31, Tiedan9, Yedanl3, Dan413, Danyul8, Shennong87, Dongdan54 as affiliated ones. In term of disease rank on differential host, 23 GLS strains could be classified into 5 pathogenecity groups through identification at adult stage. The pathogen-grown sorghum grains were used for inoculation into plant whirl. Among pathogenecity types we detected, the pathogenicity type I appeared to be highest virulence to host plants, and pathogenicity type IV is weak one, pathogenicity types Ⅱ , m were in middle place. The pathogenicity type V so far seemed to be difficult to be evaluated in pathogenecity. The result mentioned above provided a sound basis for breeding and identifying resistant cuhivars, scientifically planting resistant culti, rs in growing areas as well as monitoring of pathogen differentiation.

关 键 词：玉米灰斑病菌 致病性分化 鉴别寄主 

分 类 号：S435.13[农业科学—农业昆虫与害虫防治]