权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Genetics and Evolution of Reproductive Character Displacement in Phlox drumondii

福禄考生殖性状移位的遗传学与进化

基本信息

批准号：
0841521
负责人：
Mark Rausher
金额：
$ 100万
依托单位：
Duke University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2009
资助国家：
美国
起止时间：
2009-02-01 至 2016-01-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0841521&HistoricalAwards=false
关键词：
Genetics Evolution Reproductive Character Displacement

项目摘要

This project will examine the evolutionary processes responsible for flower-color divergence between populations of Phlox drummondii in areas with and without the closely related P. cuspidata. This divergence represents one of the best purported cases in plants of reproductive character displacement, in which two similar species with overlapping ranges evolve to minimize the amount of hybridization due to selection against gamete wastage. Combining both measures of individual fitness and analysis of patterns of molecular variation in the genes responsible for the flower-color change, the planned experiments will test whether this divergence satisfies a set of criteria for character displacement that have been developed over the past two decades, and thus determine whether this divergence truly constitutes character displacement. They will also test alternative explanations for the observed divergence, including local adaptation to an environmental factor unrelated to interaction with P. cuspidata. An integral component of the research program outlined here is the teaching and training of students at a variety of educational levels. Funds are explicitly requested to support the training of one postdoctoral fellow and one graduate student. As in the past, undergraduates will be actively engaged in this research, both as Independent Study students during the academic year, and as summer research assistants. At the high school and undergraduate levels, women and minorities under-represented in science will be targeted for training in research.

该项目将研究进化过程负责福禄考drummondii种群之间的花色分化的地区和没有密切相关的P. cuspidata。这种分歧代表了最好的传说中的情况下，在植物的生殖特性的位移，其中两个相似的物种与重叠的范围演变，以尽量减少杂交的数量，由于对配子浪费的选择。结合个体适应性的测量和负责花色变化的基因中分子变异模式的分析，计划中的实验将测试这种分歧是否满足过去二十年来开发的一套字符位移标准，从而确定这种分歧是否真正构成字符位移。他们还将测试对观察到的分歧的其他解释，包括对与P. cuspidata相互作用无关的环境因素的局部适应。这里概述的研究计划的一个组成部分是在各种教育水平的学生的教学和培训。明确要求提供资金，以支持培训一名博士后研究员和一名研究生。和过去一样，本科生将积极参与这项研究，无论是作为学年期间的独立研究学生，还是作为暑期研究助理。在高中和大学一级，将针对在科学领域代表性不足的妇女和少数民族进行研究培训。