Collaborative Research: The Evolution of Genetic Structure in Species-Specific Plant-Insect Relationships: The Relative Importance of Biogeographical and Coevolutionary Processes

合作研究：物种特异性植物-昆虫关系中遗传结构的进化：生物地理和共同进化过程的相对重要性

• 批准号: 0543582
• 负责人: John Nason
• 金额: $ 20万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-07-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0543582&HistoricalAwards=false
• 关键词: Collaborative; Research; Evolution; Genetic; Structure

The evolution of individual species is not independent of interactions with organisms. Indeed, coevolution, reciprocal evolution resulting from interactions between species over time, is increasingly being viewed as one of the major processes organizing the earth's biodiversity. The geographic mosaic theory of coevolution states that such coevolutionary interactions are highly dynamic in space and time. Associated theoretical models also indicate that the degree to which geographical patterns of inter-population gene exchange within a species (gene flow) are similar (symmetrical) between interacting species influences both local and global coevolutionary patterns. The proposed research has two primary objectives. First, it will utilize recent advances in statistical genetics and graphical modeling to develop new analytical procedures for obtaining a geographically explicit summary of gene flow within a species and for testing the symmetry of gene flow between species. Second, it will use these procedures to test predicted differences in the symmetry of gene flow in mutually beneficial (mutualism) and antagonistic (host-parasite) relationships using model plant-pollinator and plant-herbivore systems. This research thus melds theoretical and empirical approaches to gain important insight into fundamental differences in gene flow dynamics in mutualistic versus host-parasite systems, differences that may influence the geographic patterning of coadaptation in plant-insect relationships. Broader impacts of the project include the education and training of undergraduate and graduate students as well as novel outreach activities and internships involving high school science teachers.

个体物种的进化并不独立于与生物体的相互作用。事实上，随着时间的推移，物种之间的相互作用所产生的互惠进化，越来越被视为组织地球生物多样性的主要过程之一。共同进化的地理镶嵌理论指出，这种共同进化的相互作用在空间和时间上是高度动态的。相关的理论模型还表明，在何种程度上的地理格局种群间的基因交换物种（基因流）之间的相互作用的物种之间的相似（对称）影响本地和全球的共同进化模式。拟议的研究有两个主要目标。首先，它将利用统计遗传学和图形建模的最新进展，开发新的分析程序，以获得一个物种内的基因流的地理上明确的摘要，并测试物种之间的基因流的对称性。其次，它将使用这些程序来测试预测的差异，在互惠互利（互利）和拮抗（宿主-寄生虫）的关系，使用模型植物授粉和植物草食动物系统的基因流的对称性。因此，这项研究融合了理论和经验的方法，以获得重要的洞察基因流动力学的根本差异互惠与宿主-寄生虫系统，差异可能会影响地理格局的植物-昆虫的相互适应关系。该项目的更广泛影响包括本科生和研究生的教育和培训，以及涉及高中科学教师的新的外联活动和实习。