2004年甘肃省小麦条锈菌生理小种变异监测

对2004年采自甘肃省天水、陇南、定西、兰州、临夏及四川省绵阳、屏山、温江等地的276份小麦条锈菌标样进行监测,结果表明:共监测出29个生理小种及致病类型。小种消长变化总趋势与2003年基本相同,继续以Hybrid46及水源11致病类群为主,水源14类型仍为第1位流行小种,出现频率为29.3%。条中32号为第2位流行小种,出现频率已由2003年的12.4%上升到2004年的25.0%。水7、水4、居第3、4位,频率分别为8.3%、7.6%。所不同是条中31号仍为次要小种,但频率有所上升。其它小种出现频率基本不变。Yr9、Yr3b 4b、Yrsu为我省的主要致病基因。抗锈育种应以条中32号、水14、水4为主,兼顾Hybrid46和水源11致病类群中其它致病类型。

Monitoring of Physiologic Race of Wheat Stripe Rust in Gansu in 2004

276 samples were collected from Gansu Province in 2004,29 physiologic races and pathogenicity types have monitored.The variation of physiologic races showed general resemblance with in 2003: Hybrid 46 and Shuiyuan 11 were still the main pathotypes,while Shuiyuan 14 pathotypes were the first predominant race with the frequencies of 29.3%;CY 32 were second predominant race,the frequencies were rised from 12.4% in 2003 to 25% in 2004;Shuiyuan 7,Shuiyuan 4 were third and forth predominant races,the frequencies respectively were 8.3% and 7.6%.CY 31 still was subordinate race,but the frequencies had a rise.The frequencies of other races did not vary.Yr9,Yr3b 4b and Yrsu were the major pathogenicity genes in Gansu province,so it is recommended that CY 32,Shuiyuan 14 and Shuiyuan 4 should be the main races for resistance breeding.