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首页> 外文期刊>Journal of Economic Entomology >Virulence Analysis of Hessian Fly Populations From Texas, Oklahoma,and Kansas
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Virulence Analysis of Hessian Fly Populations From Texas, Oklahoma,and Kansas

机译：来自德克萨斯州，俄克拉荷马州和堪萨斯州的黑森州苍蝇种群的毒力分析

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摘要

In recent years, the number of wheat, Triticum aestivum L., fields heavily infested by Hessian fly, Mayetiola destructor (Say), has increased in the Great Plains of the United States. Historically, resistance genes in wheat have been the most efficient means of controlling this insect pest. To determine which resistance genes are still effective in this area, virulence of six Hessian fly populations from Texas, Oklahoma, and Kansas was determined, using the resistance genes H3, H4, H5, H6, H7H8, H9, H10, H11, H12, H13, H16, H17, H18, H21, H22, H23, H24, H25, H26, H31, and Hdic. Five of the tested genes, H13, H21, H25, H26, and Hdic, conferred high levels of resistance (>80% of plants scored resistant) to all tested populations. Resistance levels for other genes varied depending on which Hessian fly population they were tested against. Biotype composition analysis of insects collected directly from wheat fields in Grayson County, TX, revealed that the proportion of individuals within this population virulent to the major resistance genes was highly variable (89% for H6, 58% for H9, 28% for H5, 22% for H26, 15% for H3, 9% for H18, 4% for H21, and 0% for H13) . Results also revealed that the percentages of biotypes virulent to specific resistance genes in a given population are highly correlated (r~2 = 0.97) with the percentages of susceptible plants in a virulence test. This suggests that virulence assays, which require less time and effort, can be used to approximate biotype composition.
机译：近年来，在美国大平原上，被黑麦蝇（Mayetiola destructor（Say））黑森果蝇大量侵染的小麦数量有所增加。从历史上看，小麦中的抗性基因一直是控制这种害虫的最有效手段。为了确定哪些抗性基因在该地区仍然有效，使用了抗性基因H3，H4，H5，H6，H7H8，H9，H10，H11，H12，确定了得克萨斯州，俄克拉荷马州和堪萨斯州的六个黑森州苍蝇的毒力H13，H16，H17，H18，H21，H22，H23，H24，H25，H26，H31和Hdic。被测基因中的五个基因H13，H21，H25，H26和Hdic对所有被测群体赋予了高水平的抗性（> 80％的植物被评为抗性）。其他基因的抗药性水平因测试时所针对的黑森州苍蝇种群而异。从得克萨斯州格雷森县直接从麦田收集的昆虫的生物型组成分析表明，该种群中对主要抗性基因有毒的个体比例变化很大（H6为89％，H9为58％，H5为28％， H26为22％，H3为15％，H18为9％，H21为4％，H13为0％。结果还显示，在给定种群中，对特定抗性基因有毒力的生物型百分比与毒力测试中的易感植物百分比高度相关（r〜2 = 0.97）。这表明需要较少时间和精力的毒力测定可用于近似生物型组成。

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