| 摘要: |
| 为掌握小麦条锈菌种群动态，2001～2005年对采自陕西省7市20个县（区）主栽小麦品种和后备小麦品种苗期和成株期的条锈菌标样1101份进行了鉴定。结果表明，2001-2005年陕西省共监测到已知条锈菌生理小种和致病类型26个，分别为条中22、23、26、27、28、29、31、32号，Hybrid46-4、5、6、7、8，水源11-1、2、3、4、5、6、7、8、10、11、12、13、14。其中条中31号以前的生理小种已成为次要小种或稀有小种，条中32号出现频率一直居各小种首位，成为绝对的优势小种；Hybrid46类群和水源11类群为绝对的优势小种类群，频率总和维持在90％左右，成为优势种群。从变化趋势看，Hybrid46类群出现频率逐年下降，水源11类群出现频率逐渐上升。 |
| 关键词: 小麦 条锈病 条锈菌 生理小种 陕西省 |
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| 基金项目:国家“十五”科技攻关项目（2001BA509B03）；陕西省科技攻关项目（2003K02-G10-01）；教育部长江学者和创新团队发展计划项目（200558） |
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| Population changes of stripe rust fungus of wheat in Shaanxi province during 2001-2005 |
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| Abstract: |
| In order to investigate pathogenic changes of stripe rust fungus of wheat,1 101 samples collected from 20 counties of 7 cities in Shaanxi province during 2001-2005 were identified on 17 differential hosts,namely Trigo Eureka(Yr6),Fulhard,Lutescens 128,Mentana,Virgilio,Abbon-danza,Early Premium,Funo(YrA),Danish 1(Yr3),Jubilejina 2,Fengchan 3(Yrl),Lovrinl3(Yr9),Kangyin 655,Shuiyuan 11,Zhong 4,Lovrinl0(Yr9)and Hybrid 46(Yr3 b 4b),and consequently 26 races and pathotypes were detected,namely CY22,23,26,27,28,29,31,32,Hybrid46-4,5,6,7,8,Shuiyuan11-1,2,3,4,5,6,7,8,10,11,12,13,14.The races appearing before CY31 became subordinate races or rare races.The virulence rate of CY32 was the highest and became the dominant race in 2001-2005.The Hybrid46 group and Shuiyuan11 group were the dominant groups,the frequency total of the two groups kept stable about 90%.The variation trend of the two groups was:the virulence rate of Hybrid46 declined,while the rate of Shuiyuan11 group increased gradually. |
| Key words: wheat stripe rust Puccinia striiforrnis physiologic race Shaanxi province |
