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首页> 外文期刊>Plant Pathology >Virulence analysis of Puccinia graminis f.sp. tritici populations in Ethiopia with special consideration of Ug99
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Virulence analysis of Puccinia graminis f.sp. tritici populations in Ethiopia with special consideration of Ug99

机译：Puccinia graminis f.sp.的毒力分析。特别考虑Ug99的埃塞俄比亚小麦种群

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摘要

Wheat stem rust samples were collected in 2006 and 2007 in the Arsi, Bale, Shewa and northwest regions of Ethiopia to determine virulence diversity and race distribution in Puccinia graminis f.sp. tritici populations. Stem rust incidence was high in Arsi, Bale and east Shewa. In northwest Ethiopia, and north and west Shewa, stem rust was prevalent at low levels. A total of 152 isolates was analysed and 22 races were identified. Races TTKSR (Ug99), TTHSR and RRTTR were predominant, with frequencies of 26.6,17.7 and 114%, respectively. These races were also detected in all regions. The highly virulent race designated Ug99 was present throughout the country and dominated in all regions except northwest Ethiopia. A variant of Ug99 virulent against the stem rust resistance gene Sr24 was not detected in this study. Four stem rust resistance genes (Sr13, Sr30, Sr36 and SrTmp) were found to confer resistance to most of the races prevalent in Ethiopia. With the exception of Sr30, which is not effective against Ug99, these genes could be used in breeding for resistance to stem rust in Ethiopia.
机译：小麦茎锈病样品于2006年和2007年在埃塞俄比亚的Arsi，Bale，Shewa和西北地区采集，以确定毒力多样性和种族分布。小麦种群。在Arsi，Bale和East Shewa的茎锈病发生率很高。在埃塞俄比亚西北部和谢瓦北部和西部，茎锈病普遍发生在较低水平。总共分析了152个分离株并鉴定了22个种族。种族TTKSR（Ug99），TTHSR和RRTTR占主导地位，频率分别为26.6、17.7和114％。在所有地区也都检测到了这些种族。遍布全国的高毒种称为Ug99，在埃塞俄比亚西北部以外的所有地区都占据主导地位。在这项研究中未检测到抗茎锈病抗性基因Sr24的Ug99变异体。发现四个茎锈病抗性基因（Sr13，Sr30，Sr36和SrTmp）赋予埃塞俄比亚大多数种族以抵抗力。除了对Ug99无效的Sr30外，这些基因可用于在埃塞俄比亚育种以抵抗茎锈病。

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