摘要
小麦条锈菌新毒性小种的产生和发展是造成条锈病大流行及品种抗锈性丧失的主导因素。通过常规监测、致病性测定、毒谱分析等方法对2004—2009年采自甘肃省不同麦区1966份小麦条锈菌标样进行系统研究,共监测到37个小种和致病类型,基本反映了这期间甘肃省小麦条锈菌优势致病类群及生理小种的消长变化情况。除2005年‘条中32号’、‘条中33号’并列第1位外,出现频率为24.1%,2004、2006—2009年‘条中33号’均占居首位,出现频率分别为29.3%、26.2%、33.5%、37.6%、21.5%,‘条中32号’2004、2006—2008年为第2位,这2个小种总出现频率一直波动在37.5%~57.1%之间,第3、4位感小)种、‘2水00源4—1210-70’6,年20为0‘8年水为源‘1条1-中4’、‘33水’(源F.抗11)-、‘7’水、‘源水1源1-141’-,5出’及现‘频条率中在314号.1%’,~21010.76%年之为‘间水。源而1210-079’(年尤‘条Ⅱ中33’(F.抗)已上升为第2位,出现频率达18.9%,‘水源11-4’(F.抗)占据第4位,其他小种类型出现频率均比较低。Hybrid46致病类群和水源11致病类群出现总频率已由2004年的93.1%上升到2008年的99.4%。条锈菌已进入以‘条中33号’、‘条中32号’为代表的Hybrid46和水源11致病类群占优势的新阶段,‘条中32号’、‘条中33号’、VYr9、VYr3b+4b、VYrSu为危害中国小麦生产的主要流行小种及致病基因,这将对全国小麦条锈菌群体组成产生重要影响,为小麦抗锈育种及锈病治理提供科学依据。
New virulent race ' s occurrence and development are dominant factors of stripe rust disease outbreak and breakdown of resistance to stripe rust in wheat cultivars.In this paper,1966 wheat stripe rust samples,which were collected from different regions in Gansu Province from 2004 to 2009,were detailedly studied through routine monitoring,pathogenicity test,antivims spectra analysis and so on.Here 37 races and pathotypes were detected;that basically reflected the changes of dominant pathotypes and physiologic races in Gansu during this period.Except for ' CYR33 ' as well as ' CYR32 ' as parallel first dominant races with frequency of 24.1% in 2005,' CYR33 ' is always the first dominant race during 2004-2009 together with the frequencies of 29.3%,26.2%,33.5%,38.0% and 21.5%,respectively,while ' CYR32 ' was the second dominant race.Total frequencies of these two races were varied from 37.5% to 57.1%.The third and fourth dominant races were respectively ' shuiyuan 11-4 ',' shuiyuan 11-7 ',' shuiyuan 11-5 ' and ' CYR31 ' during 2004-2006,' shuiyuan 11-7 '(IIS),' shuiyuan 11-7 ' in 2007,and ' CYR33 '(anti-F) and ' shuiyuan 11-4 ' in 2008,with the frequencies of 4.1%-11.6%.Whereas in 2009,' CYR33 '(anti-F,frequency 18.9%) and ' shuiyuan 4 '(anti-F) were the second and fourth dominant races,respectively.And other races had lower frequencies.Total frequencies of Hybrid46 and shuiyuan 11 pathotypes rapidly increased from 93.1% in 2004 to 99.4% in 2008.Wheat stripe rust had entered into a new stage of predominant Hybrid46(represented by ' CYR33 ' and ' CYR32 ') and shuiyuan 11 pathotypes.And ' CYR32 ',' CYR33 ',Yr9,Yr3b + 4b and YrSu were the dominant races and pathotypes.This would significantly affects on stock compositions of our national wheat stripe rust,and provided scientific basis for wheat rust-resistant breeding and control.
出处
《中国农学通报》
CSCD
北大核心
2011年第9期85-90,共6页
Chinese Agricultural Science Bulletin
基金
公益性(农业)科研专项(200903035)
国家自然基金地区基金项目(30960212)
关键词
小麦条锈菌
小种
生理专化
致病类群
致病基因
wheat stripe rust
race
physiologic specialization
pathotypes
virulence genes