2010-2011年度我国小麦条锈菌生理专化研究

为给小麦条锈病预测及防控策略制定与实施提供科学依据,2010-2011年对采自全国14个省(市、自治区)的条锈菌标样进行了生理小种鉴定和分析。结果表明,在1 014份标样中,共监测到133个致病类型,其中CYR33出现频率达19.7%,与2009-2010年的23.7%相比略有下降,连续二年超过CYR32,居于首位;CYR32出现频率为18.1%(2009-2010年为21.6%),位居第二,主要分布在陕、甘、川地区。供试标样中还有44份被鉴定为贵农22致病类群,出现频率为4.3%,主要分布在四川、甘肃和云南三省,陕西、青海、山西、新疆、贵州和西藏等地亦有分布,应引起育种和推广部门的高度重视。

Physiologic Specialization of Puccinia striiformis f.sp. tritici in China during 2010-2011

In order to provide the scientific basis for wheat stripe rust prediction and prevention and control strategy formulation and implementation.1 014 stripe rust-infected wheat leaves were sampled from 14 provinces(autonomous regions) during wheat growing season in 2010-2011,and phenotyped on 20 Chinese stripe rust differentials.133 physiologic races or pathotypes were obtained.CYR33(formerly Su11-14) was leading the first place for the second time with occurrence frequency of 19.7%,decreased a little compared with 23.7% in 2009-2010.CYR32,used to be the most dominant race since 2001,was the second dominant race with occurrence frequency of 18.1%(21.6% in 2009-2010).They were mainly distributed in Shaanxi,Gansu,and Sichuan provinces.Fourty four samples were identified as virulence to Guinong 22(G22) which was first reported in 2010 in Sichuan was the new pathotype with occurrence frequency 4.3%,mainly distributed in Sichuan,Gansu,and Yunnan provinces.G22 was also found in Shaanxi,Qinghai,Shanxi,Xinjiang,Guizhou and Tibet.which should payed more attention to breeders and local government.The emeergence of new pathotype strain(G22) should be paid more attention by wheat breeding sectors and cultivar extension sectors.