【摘要】 通过 1 9个大丽轮枝菌菌株对 1 6个品种的抗、感反应 ,可以将大丽轮枝菌划分为落叶型和非落叶型两个基本类群。在落叶型类群中 ,根据 8个落叶型菌株在 R0 2、R0 4、R0 5、R0 6、R0 8、R0 9、R1 1、R1 4等 8个陆地棉品种上的综合抗、感表现首次将其分为强致病力 ( 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 R0 5、R0 6、R0 8、R0 9、R1 1、R1 4等品种的抗病鉴定 ,可以有效地把原产于江苏南通的落叶型菌株 VD8和原产于美国的落叶型菌株 T9相互区分开来。在非落叶型类群中 ,利用 R1 5、R1 4、R1 3、R1 0等 4个陆地棉品种 ,可以鉴别出 XJ4、XJ1、AY、VD40 4、VD32 6、LY、BP2等 7个菌株的致病基因不同 ,并将其分别定名为 1～ 7号小种。陆地棉 R0 1能抗所有试验用菌株。陆地棉 R1 2能有效地鉴别出强致病力菌系 ,该品种在鉴别强致病力菌系菌株方面有特异作用更多还原

【Abstract】 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.更多还原