Evolutionary Dynamics of a Plant Hybrid Zone

植物杂交区的进化动力学

• 批准号: 9407144
• 负责人: Diane Campbell
• 金额: $ 32.54万
• 依托单位: Rocky Mountain Biological Laboratory
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-01 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9407144&HistoricalAwards=false
• 关键词: Evolutionary; Dynamics; Plant; Hybrid; Zone

9407144 Campbell The main purpose of this research is to test models for the maintenance of plant hybrid zones. Clines along hybrid zones can be explained by several mechanisms that differ in the form of selection. Direct tests of these models will be conducted in a hybrid zone between 2 flowering plants, Ipomopsis aggregata and I. tenuituba. The study has two major goals. The first goal is to characterize the overall form of selection to distinguish among the proposed models. Controlled crosses will be used to produce hybrid seed, followed by reciprocal transplants to determine relative fitness of parental species and offspring hybrids at several sites along the hybrid zone. The second goal is to determine the form and mechanism of selection directly on those floral traits that exhibit clines. Quantitative, molecular and observational methods will be used to address this second goal.

[407144]坎贝尔本研究的主要目的是测试植物杂交区维护的模型。沿着杂交带的变异可以用几种不同选择形式的机制来解释。这些模型的直接试验将在两种开花植物，Ipomopsis aggregata和I. tenuituba之间的杂交区进行。这项研究有两个主要目标。第一个目标是描述选择的总体形式，以区分所提出的模型。控制杂交将用于产生杂交种子，然后进行互移植，以确定亲本物种和后代杂交在杂交区几个地点的相对适合度。第二个目标是直接确定那些表现出曲线的花性状的选择形式和机制。定量、分子和观察方法将用于解决第二个目标。