Dissertation Research: Population Biology, Phylogenetic Systematics, and Conservation Management of Spiranthes diluvialis

论文研究：水菊的种群生物学、系统发育系统学和保护管理

• 批准号: 9310810
• 负责人: Thomas Ranker
• 金额: $ 1.1万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-15 至 1995-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9310810&HistoricalAwards=false
• 关键词: Dissertation; Research; Population; Biology; Phylogenetic

9310810 Ranker This research project will address three questions central to understanding the evolution of the rare orchid, Spiranthes diluvialis, and ensuring the future existence of this threatened species 1) What is the phylogenetic or genealogical history of S. diluvialis? 2) What is the genetic structure and variation within and among populations of S. diluvialis? and, 3) What is the interplay between life history stages and environmental conditions and how do these parameters impact the continued existence of S. diluvialis? %%% This research will provide information critical to formulation of conservation management plans for S. diluvialis as well as data on the basic biology and evolution of this threatened species. This study is the first to explore the origin of a polyploid species (a species with more than two sets of chromosomes) in the Orchidaceae through the application of molecular techniques. The research will provide information regarding the possible allopolyploid origin (via hybridization of two genetically distinct diploid species) of S. diluvialis and its distinctness as a species. Electrophoretic data will allow identification of the putative parental taxa and provide insight into the genetic variability present within the genus. Knowledge of the evolutionary origin of S. diluvialis will provide a meaningful framework for and insight into both genetic and ecological studies critical to the continued existence of this rare orchid. *** 9310810 Ranker This research project will address three questions central to understanding the evolution o f the rare orchid, Y U F ( Times New Roman Symbol & Arial p Y " h _ ea e Z Ranker/Arft Abstract Dissertation Elizabeth M. Behrens Elizabeth M. Behrens

本研究项目将解决三个核心问题，以了解珍稀兰花，spianthes diluvialis的进化，并确保这一濒危物种的未来生存：1)什么是S. diluvialis的系统发育或谱系历史？2)洪积沙棘种群内和种群间的遗传结构和变异是什么？3)生长期阶段与环境条件之间的相互作用是什么，这些参数如何影响洪积沙棘的持续存在？这项研究将为制定洪积沙棘的保护管理计划提供重要信息，并为这一濒危物种的基本生物学和进化提供数据。本研究首次应用分子技术探索兰科多倍体物种（具有两套以上染色体的物种）的起源。该研究将提供有关洪积沙棘可能的异源多倍体起源（通过两个遗传上不同的二倍体物种杂交）及其作为一个物种的独特性的信息。电泳数据将允许鉴定假定的亲本分类群，并提供洞察目前在属的遗传变异性。了解洪泛兰的进化起源将为这种稀有兰花的持续存在提供一个有意义的遗传和生态研究框架和见解。Ranker这个研究项目将解决三个问题，这些问题对于理解稀有兰花的进化至关重要：YUF (Times New Roman Symbol & & Arial p " h _ e Z Ranker/Arft摘要论文Elizabeth M. Behrens Elizabeth M. Behrens