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Dissertation Research: Investigating Phylogeny, Reticulate Evolution, and Gene Tree Discordance in New World Dryopteris (Dryopteridaceae)

论文研究：研究新世界鳞毛蕨（鳞毛蕨科）的系统发育、网状进化和基因树不一致

基本信息

批准号：
1110335
负责人：
Thomas Givnish
金额：
$ 1.49万
依托单位：
University of Wisconsin-Madison
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2011
资助国家：
美国
起止时间：
2011-06-01 至 2012-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1110335&HistoricalAwards=false
关键词：
Dissertation Research Investigating Phylogeny Reticulate

项目摘要

Ferns are the second largest group of vascular plants on earth, and are the sister group of the diverse and economically important seed plants. This project will be one of the first to produce a family tree for a widespread fern genus, and will employ that tree to investigate a number of critical questions about how evolution has proceeded in this important but understudied group of plants. The current study will use DNA sequence data to test several hypotheses regarding species relationships, biogeography, and the roles of hybridization and genome doubling (polyploidy) in shaping the history of the North American species of woodferns (Dryopteris). Dryopteris is a species-rich, morphologically diverse, biogeographically widespread, and beautiful genus, and the North American members have long been thought to reflect a complex history of reticulate (non-branching) speciation.This project will facilitate international collaboration and will result in the training of a female PhD student as well as undergraduate students that she will mentor. All data and results will be disseminated widely, to the scientific community via online databases, in publications and talks, to the public via outreach presentations, via a fern weblog, and to middle and high school students through the Botanical Society of America's PlantingScience program.

蕨类植物是地球上第二大维管植物类群，也是多种经济上重要的种子植物的姐妹类群。该项目将是第一个为广泛分布的蕨类植物属制作家谱的项目之一，并将利用该家谱来调查一些关于这一重要但研究不足的植物群如何进化的关键问题。目前的研究将使用DNA序列数据来测试有关物种关系，地理学以及杂交和基因组加倍（多倍性）在塑造北美木蕨物种（鳞毛蕨属）历史中的作用的几个假设。鳞毛蕨是一个物种丰富，形态多样，地理分布广泛，美丽的属，北美成员长期以来一直被认为反映了网状（非分支）物种形成的复杂历史。该项目将促进国际合作，并将导致一名女博士生的培训，以及她将指导的本科生。所有的数据和结果将被广泛传播，通过在线数据库，出版物和讲座向科学界传播，通过外展演示向公众传播，通过蕨类植物博客，并通过美国植物学会的PlantingScience计划向中学生传播。