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

9310810这项研究项目将解决三个问题，以了解稀有兰花--稀有兰花的进化，并确保这一濒危物种的未来生存：1)稀水螺兰的系统发育或系谱历史是什么？2)稀水螺兰种群内和种群间的遗传结构和变异是什么？以及，3)生活史阶段和环境条件之间的相互作用，以及这些参数是如何影响稀疏螺旋藻的继续生存的？%本研究将为制定稀疏螺旋藻的保护管理计划以及该濒危物种的基本生物学和进化数据提供关键信息。本研究首次应用分子生物学技术对兰科植物多倍体物种(具有两组以上染色体的物种)的起源进行了探讨。这项研究将提供有关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)的信息，以及它作为一个物种的特殊性。电泳数据将有助于鉴定推测的亲本分类群，并提供对该属内存在的遗传变异性的洞察。对稀有兰花进化起源的了解将为这种稀有兰花的继续存在提供一个有意义的框架和对遗传和生态研究的洞察。*9310810排名这个研究项目将解决三个问题，这三个问题是理解稀有兰花进化的核心，是使用F(Times New Roman符号&amp；Arial p Y“h_EA e Z Ranker/Arft摘要论文伊丽莎白·M·贝伦斯伊丽莎白·M·贝伦

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