摘要
１９９４年在国内８省区３５个县的８３个小麦品种上采集到小麦秆锈病标样２０１份，繁殖存活了１３６份，在分离到的３３２个菌株中鉴定出２１Ｃ３、３４、３４Ｃ１和３４Ｃ２四个生理小种；２１Ｃ３ＣＫＲ、２１Ｃ３ＣＫＨ、２１Ｃ３ＣＴＲ、２１Ｃ３ＣＴＨ、２１Ｃ３ＣＰＲ、２１Ｃ３ＣＰＨ、２１Ｃ３ＣＦＲ，３４ＭＦＧ、３４ＭＫＧ，３４Ｃ１ＭＫＲ、３４Ｃ１ＭＫＨ，３４Ｃ２ＭＫＲ、３４Ｃ２ＭＫＫ、３４Ｃ２ＭＦＫ、３４Ｃ２ＭＫＨ等１５个致病类型。生理小种２１Ｃ３出现频率为７７．０％，３４Ｃ２为１６．１％位居第二，３４为６．０％，３４Ｃ１为０．９％；各致病类型的出现频率依次为２１Ｃ３ＣＫＲ３１．６％、２１Ｃ３ＣＴＲ３１．０％、２１Ｃ３ＣＫＨ和２１Ｃ３ＣＰＲ均为４．８％、２１Ｃ３ＣＴＨ３．０％、２１Ｃ３ＣＦＲ１．２％、２１Ｃ３ＣＰＨ０．６％，３４ＭＫＧ３．９％、３４ＭＦＧ２．１％、３４Ｃ１ＭＫＲ０．６％、３４Ｃ１ＭＫＨ０．３％、３４Ｃ２ＭＫＲ６．７％、ＭＫＫ５．８％、３４Ｃ２ＭＫＨ３．０％、３４Ｃ２ＭＦＫ０．６％，２１Ｃ３ＣＫＲ和ＣＴＲ出现频率明显高于其它致病类型。２１Ｃ３ＣＴＲ自１９９３年发现以来，出现频率上升很快，在云南、四川、湖北?
isolates were isolated from 136 survival samples out of 201 raw samples collected from 83 wheat cultivars in 35 counties of 8 provinces or autonomous regions in 1994. After indentified, the 332 isolates belonged to races 21C3, 34, 34Cl and 34C2 or pathotypes 21C3CKR, 21C3CKH, 21C3CTR, 21C3CTH, 21C3CPR, 21C3CFR; 34MFG, 34MKG;34C1MKR, 34C1MKH; 34C2MKR, 34C2MKK,34C2MFK, 34C2MKH, respectively. The highest occur rence frequency race was 21C3(77.0%), next was 34C2(16.1%), following them were races 34(6%), 34C1(0.9%). The highest occurrence frequency pathotype was 21C3CKR (31.6%), following it were 21C3CTR (3.0%), 21C3CKH(4.8%), 21C3CPR(4.8%), 21CTH (3.0%), 21C3CFR (1.2%), 21C3CPH (0.6%), 34MKG (3.9%), 34MFG (2.1%), 34C1MKR (0.6%), 34C1MKH (0.3%), 34C2MKR (6.7%), 34C2MKK(5.8%), 34C2MKH(3.0%), 34C2MFK (0.6%),Pathotype 21C3CTR increased rapidly and had occurred in Yunnan, Sichuna, Hubei, Henan, Hebei and Gansu Provinces since found in 1993. 34C2 was relatively stronger virulent race and its occurrence frequency was little higher in 1993, although it occurred only locally.
出处
《沈阳农业大学学报》
CAS
CSCD
1996年第4期263-268,共6页
Journal of Shenyang Agricultural University
基金
国家"八五"科技攻关项目
关键词
小麦
秆锈菌
致病类型
毒力频率
wheat stem rust
pathotype
virulence frequency
