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用17个“Pallas”近等基因品系和3个已知抗性基因的品系作为鉴别寄主,对中国东南沿海4个地区(浙江海盐、杭州,江苏盐城和福建莆田)的220个大麦白粉菌(Blumeria graminisf.sp.hordei)单孢菌落的致病性进行鉴定。结果显示,这些菌株可划分为13个致病型,0023042(42.3%)和0023052(20.0%)为优势致病型;所有的致病型含有4-7个毒性基因,均含有毒性基因Va22,Vra和VRu2;该群体对10个分别含有Mla1,Mla3,Mla6,Mla7,Mla9,Mla12,Mla13,Mla23,Mlat和Mlg抗性基因的品系表现为低毒性,它们是抗大麦白粉病育种中可利用的抗病基因。
A total of 220 barley powdery mildew from barley in four coastal areas of China (Haiyan in Zhejiang Province, Hangzhou, Yancheng in Jiangsu Province and Putian in Fujian Province) were used as the identification host, using 17 “Palalas” isogenic lines and 3 lines of known resistance genes. Blumeria graminisf.sp.hordei) monospore colonies were identified. The results showed that these strains were divided into 13 pathotypes, 0023042 (42.3%) and 0023052 (20.0%) were predominant pathotypes. All pathotypes contained 4-7 virulence genes, all of which contained the virulence genes Va22, Vra and VRu2; the population showed low toxicity to ten lines containing the Mla1, Mla3, Mla6, Mla7, Mla9, Mla12, Mla13, Mla23, Mlat and Mlg resistance genes, respectively, which are available in breeding against barley powdery mildew Disease resistance genes.