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首页> 外文期刊>Heredity: An International Journal of Genetics >Host-plant-associated genetic differentiation in Northern French populations of the European corn borer.
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Host-plant-associated genetic differentiation in Northern French populations of the European corn borer.

机译：欧洲玉米bore的法国北部人口中与寄主植物相关的遗传分化。

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摘要

The phytophagous insects that damage crops are often polyphagous, feeding on several types of crop and on weeds. The refuges constituted by noncrop host plants may be useful in managing the evolution in pest species of resistance to the Bacillus thuringiensis toxins produced by transgenic crops. However, the benefits of these refuges may be limited because host-plant diversity may drive genetic divergence and possibly even host-plant-mediated sympatric speciation. The European corn borer, Ostrinia nubilalis Hubner (Lepidoptera: Crambidae), is the main pest of maize in Europe and North America, where it was introduced early in the 20th century. It has a wide host range but feeds principally on mugwort (Artemisia vulgaris L.) and maize (Zea mays L.). O. nubilalis is found on mugwort only in the northern part of France, whereas it is found on maize throughout France. The extent of genetic variation at allozyme markers was investigated in populations collected from the two host plants over the entire geographical distribution of the European corn borer on mugwort in France. Allelic differentiation between pairs of populations and hierarchical analyses of pools of samples from each host plant indicate that the group of populations feeding on maize differed from the group of populations feeding on mugwort. Our results suggest (1) host-plant-related divergent selection at the genomic region surrounding the Mpi locus and (2) limited gene flow between the populations feeding on mugwort and those infesting maize fields. These data indicate that adults emerging from mugwort would not be useful for managing the evolution of resistance to the B. thuringiensis toxins in European corn borer populations.Heredity (2003) 90, 141-149. doi:10.1038/sj.hdy.6800186
机译：破坏作物的植食性昆虫通常是多食性的，以几种作物和杂草为食。由非农作物寄主植物组成的避难所可能对控制转基因农作物对苏云金芽孢杆菌毒素产生抗性的害虫物种的进化有用。但是，这些庇护所的好处可能会受到限制，因为寄主植物的多样性可能会导致遗传差异，甚至可能导致寄主植物介导的同胞物种形成。欧洲玉米bore，Ostrinia nubilalis Hubner（鳞翅目：Crambidae）是欧洲和北美玉米的主要害虫，于20世纪初引入欧洲。它的寄主范围很广，但主要以艾蒿（Artemisia vulgaris L.）和玉米（Zea mays L.）为食。仅在法国北部艾蒿中发现了脐橙，而在整个法国的玉米中均发现了该菌。在欧洲艾host在法国艾蒿上的整个地理分布中，从这两种寄主植物收集的种群中调查了同工酶标记处的遗传变异程度。种群对之间的等位基因分化和每种寄主植物样品池的层次分析表明，以玉米为食的种群不同于以艾蒿为食的种群。我们的结果表明：（1）在Mpi基因座周围的基因组区域中与寄主植物相关的发散选择，以及（2）以艾蒿为食的种群和侵害玉米田的种群之间的基因流有限。这些数据表明，从艾蒿中脱颖而出的成虫对于控制欧洲玉米bore种群对苏云金芽孢杆菌毒素的抗性进化没有帮助。Heredity（2003）90，141-149。 doi：10.1038 / sj.hdy.6800186

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