大丽轮枝菌在棉花品种上的致病力分化研究

通过１９个大丽轮枝菌菌株对１６个品种的抗、感反应，可以将大丽轮枝苗 发为落叶型和非常叶型两个基本类群。在落叶型类群中，根据８个落叶型菌株在Ｒ０２、Ｒ０４、Ｒ０５、Ｒ０６、Ｒ０８、Ｒ０９、Ｒ１１、Ｒ１４等８个陆地棉品种上的综合抗、感表现首次将分为强致病力（ＸＳ４为代表）、中等偏强致病力（Ｔ９为代表）和中等致病力（ＶＤ８为代表）３类。通过对Ｒ０５、Ｒ０６、Ｒ０８、Ｒ０９、Ｒ１１、Ｒ１４等品种的抗病鉴定

Pathogenicity Differentiation of Verticillium dahliae on Cotton Varieties

In the defoliating group, 8 defoliating isolates were for the first time divided into three categories: strong pathogenic (XS4 as the representative), medium with inclination to strong pathogenic (T9 as the representative) and medium pathogenic (VD8 as the representative) according to the comprehensive pathogenic expression of 8 defoliating isolates on the upland varieties R02, R04, R05, R06, R08, R09, R11 and R14.The defoliating isolate VD8 originated from Nantong of Jiangsu province was efficiently identified from the defoliating isolate T9 originated from USA in the light of resistance identification on varieties such as R05, R06, R08, R09, R11 and R14. In non defoliating group, by utilizing upland varieties such as R15, R14, R13 and R10 for identification , it might be identified that the pathogenic genes in 7 isolates XJ4, XJ1, AY, VD404, VD326, LY, BP2 were different from each other and might be named as races No.1 to No.7 respectively. R01 was resistant or tolerant to all the isolates used in the experiments especially the defoliating isolates.R12 might has a specific function in identification of strong pathogenic isolates.