摘要
为监测小麦病菌毒性变异,指导抗病品种选育和大面积布局,2005-2010年在四川阿坝、甘孜、凉山等小麦条锈病菌越夏区以及盆地内冬春流行区采集条锈病标样,单孢子堆分离菌株后接种全国小麦条锈病菌生理小种鉴别寄主和四川辅助鉴别寄主川麦42,6年共分离、接种617个小麦条锈病菌株,测得已知生理小种或致病类型33个。结果表明,自越夏区分离的137个菌株中测出17个已知小种或致病类型;自流行区分离的460个菌株中测得30个已知小种小种或致病类型,其中贵农22类群是一种新的致病类群。病菌在越夏区和盆地内冬春流行区的生理小种毒性组成表明,越夏区病菌毒性慢于流行区,盆地内病菌受到来自陇南和四川西部越夏区菌源以及当地品种布局的共同影响。
The monitoring of the virulence changes in the pathogen population is essential to the success of the breeding and deployment of the resistant varieties,which were the most proficient and safety methods to lower the disease losses.617 isolates were collected from over-summer areas in Aba,Ganzi and Liangshan as well as the epidemic areas inside Sichuan basin and inoculated onto the differential varieties of China physiologic races of the pathogen from 2005 to 2010,and totally 33 known physiologic races or virulence types were obtained.The result showed that 17 races or virulence types were identified out of 317 isolates from over-summer areas whereas 30 races or virulence types were identified out of 460 isolates inside the basin.A new virulence group infecting ‘ Guinong 22＇ was first reported from Sichuan Basin.The composition of physiologic races and virulence types indicated that the virulence changes in the over-summer areas in Sichuan was slower than that inside Sichuan basin,where the virulence structure was impacted by the uredia spread from over-summer areas in Sichuan and neighboring Gansu province,as well as the local varieties of wheat.
出处
《西南农业学报》
CSCD
北大核心
2013年第5期1858-1863,共6页
Southwest China Journal of Agricultural Sciences
基金
公益性行业(农业)科研专项(200903035)
四川省育种攻关项目(YZGG-2006-25-3)
关键词
小麦条锈菌
生理小种
致病类型
毒性谱
致病类群
四川
Puccinia striiformis f.sp.tritici
Physiologic race
Virulence pattern
Virulence group
