Hybrid Cottonwood-Herbivore Interactions: Integration of Biogeographic and Synthetic Population Studies

杂种杨木与草食动物的相互作用：生物地理学和综合种群研究的整合

• 批准号: 9726648
• 负责人: Thomas Whitham
• 金额: $ 35万
• 依托单位: Northern Arizona University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-03-15 至 2001-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9726648&HistoricalAwards=false
• 关键词: Hybrid; Cottonwood; Herbivore; Interactions; Integration

9726648 Whitham Biologists have long considered hybridization to be a major impetus to plant evolution. Mechanisms of how such events influence the ecological performance of a species are largely unexplored. This research will consider how variation created by hybridization affects diverse members of an ecological community. The research will focus on cottonwoods (Populus spp.), which are important trees in riparian habitats of the western US and known to hybridize frequently. One of the goals of this project is to discover whether or not the genetic differences in individuals of hybrid populations in the wild determine the distribution of invertebrate herbivores. Another is to determine if hybrid zone size affects the concentration of herbivores. In addition, common-garden studies will be conducted to determine the underlying mechanisms that affect hybrid resistance and susceptibility to herbivores. These latter experiments will allow the investigators to determine the heritability of traits involved in herbivore resistance. The outcome of this research is likely to provide new insights into how genetic variation resulting from hybridization contributes to community level processes. s

9726648 惠瑟姆 生物学家长期以来一直认为杂交是植物进化的主要动力。 这些事件如何影响一个物种的生态表现的机制在很大程度上是未知的。这项研究将考虑杂交产生的变异如何影响生态群落的不同成员。 这项研究将集中在三角叶杨（杨属），这是美国西部河岸栖息地的重要树种，已知经常杂交。该项目的目标之一是发现野生杂交种群个体的遗传差异是否决定了无脊椎食草动物的分布。另一个是确定杂交区的大小是否影响食草动物的集中。 此外，共同花园的研究将进行，以确定潜在的机制，影响杂交抗性和易感性草食动物。 这些后面的实验将使研究人员能够确定与食草动物抗性有关的性状的遗传力。这项研究的结果可能会提供新的见解如何杂交导致的遗传变异有助于社区水平的过程。 S