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首页> 外文期刊>South African Journal of Plant and Soil >Valuable Russian wheat aphid-resistant bread wheat accessions identified using four South African Diuraphis noxia biotypes
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Valuable Russian wheat aphid-resistant bread wheat accessions identified using four South African Diuraphis noxia biotypes

机译：使用四个南非Diuraphis Noxia Biotypes识别的贵重俄罗斯小麦蚜虫抗性面包小麦加入

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摘要

Resistance-breaking biotypes of Diuraphis noxia have been reported in both the USA and South Africa where commercial cultivars with genetic resistance to this pest have been deployed. The need to identify novel Russian wheat aphid (RWA) resistance fordeployment against new biotypes of RWA has driven the recent re-evaluation and characterisation of resistance in landraces of bread wheat from germplasm collections worldwide. Twenty-three genotypes already in use in a South African pre-breeding programme were evaluated with the extended spectrum of South African RWA biotypes, while four genotypes not yet tested with South African RWA were screened with RWASA1, RWASA2, RWASA3 and RWASA4 for the first time. Five accessions, namely PI 94355, PI 243781, PI 361836, PI 626580 and the check CItr 2401, were resistant to all four South African RWA biotypes. The previously unused accessions PI 094355 and PI 243781 will be incorporated into the programme. The sixth accession resistant to RWASA4, namely PI 366518, is susceptible to RWASA2 and RWASA3 and may possibly be unique, meriting emphasis in pre-breeding activities. The use of multiple, distinct resistance genes, including those with a moderate resistance reaction, is seen as the most responsible strategyfor the stewardship of genetic resistance to RWA in bread wheat.
机译：美国和南非的Diuraphis Noxia的抵抗生物型在美国和南非报道，其中已经部署了对这种害虫的遗传性抵抗力的商业品种。需要确定对RWA的新生物型新颖的俄罗斯小麦蚜虫（RWA）抗性fordeployment带动性的近期重新评估和鉴定的面包小麦的地方品种的种质收集世界各地。二十三种基因型已经在南非使用的预繁殖计划与南非RWA生物型的扩展频谱进行评估，而四种基因型尚未与南非RWA测试与RWASA1，RWASA2，RWASA3和RWASA4筛选第一时间。五次加入，即PI 94355，PI 243781，PI 361836，PI 626580和检查CITR 2401，是所有四个南非RWA生物型抗药性。以前未使用的载体PI 094355和PI 243781将被纳入该程序。第六加入RWASA4，即PI 366518抗性，易受RWASA2和RWASA3并且可能是唯一的，在预饲养活动meriting强调。使用多个不同的抗性基因，包括那些具有中等电阻的反应，被看作是最负责任strategyfor到RWA遗传抗性在面包小麦的指导。

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