Dissertation Research: Geographic Radiations and Speciation in Alpine Clades of Synthyris (Plantaginaceae): A Phylogeographic Approach

论文研究：高山车前草分支的地理辐射和物种形成：系统发育地理学方法

• 批准号: 0608026
• 负责人: Larry Hufford
• 金额: --
• 依托单位: Washington State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-06-01 至 2008-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0608026&HistoricalAwards=false
• 关键词: Dissertation; Research; Geographic; Radiations; Speciation

This is a study to assess variation in DNA sequences of chloroplast genes to determine if morphologically indistinguishable populations of plants are genetically different enough to be recognized as new species and what has contributed to this difference. As a model, two groups of closely related alpine species in the genus Synthyris (Plantaginaceae) will be genetically evaluated. Synthyris chloroplast genes are variable within and among species and populations. By comparing the amount of variation in genes among the species with genetic change within a species, it should be possible to identify genetic change that occurred during and following speciation. The distribution of genetically distinct lineages should suggest processes of evolution related to geographic and climate change.Results of this study will contribute to an understanding of the evolutionary processes that have resulted in the plant diversity of the Rocky Mountains. Patterns of genetic diversity revealed can be used to manage species diversity on public lands. Results will be published in scientific journals and distributed to resource managers in areas where this study is conducted. This research will contribute to understanding the biodiversity and biogeography of the American West based on different patterns of genetic diversity in plants on the landscape.

这是一项评估叶绿体基因DNA序列变异的研究，以确定在形态上难以区分的植物种群的遗传差异是否足以被识别为新物种，以及是什么导致了这种差异。作为模式，将对车前草属(车前科)两组关系密切的高山物种进行遗传评估。合体藻叶绿体基因在物种和种群内和种群之间是不同的。通过比较物种间基因的变异量和物种内的遗传变化，应该可以确定物种形成过程中和之后发生的遗传变化。遗传上不同的谱系的分布应该表明与地理和气候变化有关的进化过程。这项研究的结果将有助于理解导致落基山脉植物多样性的进化过程。揭示的遗传多样性模式可用于管理公共土地上的物种多样性。研究结果将发表在科学期刊上，并分发给进行这项研究的地区的资源经理。这项研究将有助于了解美国西部的生物多样性和生物地理，基于景观上植物遗传多样性的不同模式。