Collaborative Research: Host-Associated Genetic Differentiation in the Goldenrod Elliptical-Gall Moth Gnorimoschema Gallaesolidaginis - Parallel Host Race Formation?

合作研究：黄花椭圆瘿蛾 Gnorimoschema Gallaesolidaginis 中宿主相关的遗传分化 - 平行宿主种族形成？

• 批准号: 0107938
• 负责人: John Nason
• 金额: $ 24万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0107938&HistoricalAwards=false
• 关键词: Collaborative; Research; Host; Associated; Genetic

0107938NasonThe astounding diversity of herbivorous insects (1-5 million species) is poorly understood, but one possible mechanism for their diversification is sympatric speciation via host race formation - that is, adaptation to and speciation on different host plants in the absence of geographic barriers to gene exchange. While a few cases of host race formation in sympatry are known, it remains un-known whether this process is rare and special or frequent and predictable. A promising avenue toward answering this question is provided by the diverse group of insects attacking the goldenrods Solidago altissima and S. gigantea. Focussing on one of these insects, the goldenrod elliptical-gall moth, Gnorimoschema gallaesolidaginis, we will use genetic data to document the geographic extent and structure of genetic differentiation, reconstruct the history of host shifting, and identify evolutionary forces driving differentiation. At the same time, we will use lab and field experiments to identify ecological mechanisms maintaining host plant affiliation and reproductive isolation (e.g. mate choice, adult and larval host choice, and/or host-associated tradeoffs in larval performance). Our studies of differentiation in G. gallaesolidaginis will complement ongoing studies of differentiation in other Solidago herbivores. Together, these studies will tell us much about how (and how often) host race formation might have contributed to the spectacular diversification of herbivorous insects.

0107938 Nason草食性昆虫惊人的多样性（1-5百万种）知之甚少，但它们多样化的一个可能机制是通过宿主种族形成的同域物种形成-即在没有地理障碍的情况下适应不同的宿主植物并在其上形成物种。 虽然在同域生活中有几个宿主种族形成的案例是已知的，但仍然不知道这个过程是罕见和特殊的还是频繁和可预测的。攻击黄花一枝黄花和黄花一枝黄花的多种昆虫群为回答这一问题提供了一个有希望的途径。巨人。集中在这些昆虫之一，一枝黄花椭圆瘿蛾，Gnorimoschema gallaesolidaginis，我们将使用遗传数据来记录遗传分化的地理范围和结构，重建宿主转移的历史，并确定驱动分化的进化力量。 与此同时，我们将使用实验室和田间实验，以确定生态机制，保持宿主植物的联系和生殖隔离（如配偶的选择，成人和幼虫的主机选择，和/或主机相关的权衡在幼虫的性能）。 我们对G. gallaesolidaginis将补充正在进行的其他食草一枝黄花的分化研究。总之，这些研究将告诉我们很多关于宿主种族的形成如何（以及多久）可能有助于植食性昆虫的壮观多样化。