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期 刊 ：植物保护学报 2006年

关键词：小麦白粉病菌；生理小种鉴定；毒性基因分析；

Keywords:Blumeria graminis, race identification, virulent gene analysis,

摘 要 ：对1999~2002年小麦白粉病菌的生理小种类型、毒性基因频率进行了研究。结果表明,白粉病菌小种种群结构复杂,1999~2002年共鉴定出33个生理小种,优势小种均为15号生理小种,出现频率分别为40.48%、22.22%、29.03%、30.30%,其次为11号和5号小种。毒性基因V3c、V3f、V5、V8的毒力频率较高,在50％以上,而V2、V4a、V4b、V12、V16、V19的毒力频率较低,低于20％。供试的小麦白粉病菌菌株含3~7个毒性基因的较多,其中含4个毒性基因组合的比例最高,为25.84%。

Abstract:The race types and virulent gene analysis of Blumeria graminis were studied. 33 races were known and the most common race was race 15 and its occurrence frequencies were 40.48%, 22.22%,29.03% and 30.30% during the period of 1999 to 2002, respectively. Following race 15 were races 11 and 5. It was proved that the virulent frequencies of V3c,V3f,V5,V8 was higher, more than 50%, that of V2,V4a,V4b,V12,V16 and V19 was lower,less than 20%,by analysis of virulence gene.Most isolates contained 3-7 virulent genes,and combination frequency of 4 virulent genes are 25.84%.

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