Dissertation Research: Gene Flow and Local Adaptation in a Herbivorous Insect

论文研究：草食昆虫的基因流和局部适应

• 批准号: 8901212
• 负责人: Bruce Tabashnik
• 金额: $ 0.7万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-06-15 至 1991-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8901212&HistoricalAwards=false
• 关键词: Dissertation; Research; Gene; Flow; Local

The ability of a species to adapt to local variations in habitat is decreased by movement of individuals from one habitat to another. However, in a highly mobile insect, the diamond back moth, local variation in resistance to insecticides occurs. This research is designed to determine the source of this variation. Is the variation an indication that gene flow (a result of individual movement and reproduction in the new habitat) is low despite high mobility? Or is gene flow substantial, but its effects overwhelmed by local variation in selection for insecticide resistance? Data will be collected by marking moths and measuring movement, andy by examining genetic variation between populations. These data will be compared with the use of a computer simulation model. The results of this research will be important in understanding how species adapt to variations in their environment, and how strongly divided such populations are into local, somewhat autonomous groups. Knowing how gene flow affects the ability of insects to respond to environmental changes will also help understanding how insects adapt to insecticides, and how the evolution of resistance to insecticides and genetically engineered plants might be managed.

由于个体从一个栖息地迁移到另一个栖息地，物种适应栖息地局部变化的能力会降低。然而，在一种高度机动的昆虫--钻石背飞蛾中，对杀虫剂的抗药性会发生局部变化。这项研究旨在确定这种变异的来源。这种变化是否表明，尽管新栖息地的流动性很高，但基因流动(个体在新栖息地的运动和繁殖的结果)是低的？或者，基因流动是实质性的，但其影响被杀虫剂抗性选择的局部差异所淹没？数据将通过标记飞蛾和测量活动来收集，安迪，通过检查种群之间的遗传变异来收集数据。这些数据将与使用计算机模拟模型进行比较。这项研究的结果将对理解物种如何适应环境的变化，以及这些种群如何强烈地划分为局部的、某种程度上自治的群体具有重要意义。了解基因流动如何影响昆虫对环境变化的反应能力，也将有助于了解昆虫如何适应杀虫剂，以及如何管理对杀虫剂和转基因植物的抗性进化。