DISSERTATION RESEARCH: Identifying and Measuring Components of Reproductive Isolation Between Terminal Forms of the Ensatina eschscholtzii Ring Species Complex

论文研究：识别和测量 Ensatina eschscholtzii 环种复合体终端形式之间生殖隔离的组成部分

• 批准号: 0909821
• 负责人: Craig Moritz
• 金额: $ 1.49万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-01 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0909821&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Identifying; Measuring; Components

The salamander Ensatina eschscholtzii is the most famous example of a 'ring species', a rare situation in which a ring of interbreeding populations surrounds an area of unsuitable habitat and the end populations of the ring exist in the same area without interbreeding. This proposal seeks to identify and measure the barriers to reproduction that prevent gene flow between the terminal forms of Ensatina. Mating trials will be used to test for differences in courtship behavior that may reduce mating between the terminal forms. Parentage will be determined for the offspring of these crosses to investigate patterns of sperm use when females have mated multiple times. Finally, a mark-recapture study will test whether differential habitat preference reduces the opportunity for encountering (and mating with) individuals of the alternative form. This study will provide a detailed case study in nature where barriers that prevent gene flow between incipient species are identified and measured. The project will directly support a graduate student and will include participation by undergraduates from diverse backgrounds. Results will be communicated to the public via the award-winning 'Understanding Evolution' website (http://evolution.berkeley.edu/), a site developed and maintained by UC Berkeley to provide resources for evolution education to teachers and students.

蝾螈Ensatina eschscholtzii是“环形物种”最著名的例子，这是一种罕见的情况，即一个杂交种群的环形围绕着一个不适合栖息地的区域，而环形的最终种群存在于同一个区域而没有杂交。该提案旨在确定和测量阻止Ensatina终端形式之间基因流动的生殖障碍。交配试验将用于测试可能减少终末形式之间交配的求偶行为差异。将确定这些杂交后代的亲子关系，以研究雌性多次交配时的精子使用模式。最后，标记-再捕获研究将测试不同的栖息地偏好是否减少了遇到（和交配）替代形式的个人的机会。这项研究将提供一个详细的案例研究，在自然界中，阻止基因流之间的初始物种的障碍被确定和测量。该项目将直接支持一名研究生，并将包括来自不同背景的本科生的参与。结果将通过获奖的“理解进化”网站（http：//evolution.berkeley.edu/）向公众传达，该网站由加州大学伯克利分校开发和维护，为教师和学生提供进化教育资源。