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REU: Phylogenetic Relationships and Evolution in the Heuchera Group (Saxifragaceae) Using DNA Restriction Fragment Analysis

REU：利用 DNA 限制性片段分析研究 Heuchera 族（虎耳草科）的系统发育关系和进化

基本信息

批准号：
8717471
负责人：
Douglas Soltis
金额：
$ 13.34万
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：
1988
资助国家：
美国
起止时间：
1988-01-15 至 1991-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8717471&HistoricalAwards=false
关键词：
REU Phylogenetic Relationships Evolution Heuchera

项目摘要

Previous studies of plants in the flowering plant family Saxifragaceae have used evidence from morphology, chemistry, chromosomes, and hybridization experiments. These earlier investigations have helped to clarify taxonomic relationships among genera in what has traditionally been considered a troublesome group. But given the evidence of parallel and convergent evolution in morphological and phytochemical characters in other plant groups, the phylogenetic affinities of these saxifrages remain problematic. Dr. Douglas Soltis of Washington State University will apply the powerful new methods of mutational analysis of chloroplast DNA, and to a lesser extent, nuclear ribosomal DNA, to examine evolutionary change within this group. The goals of Dr. Soltis's molecular systematic analysis are to: l. construct a phylogenetic framework for the nine genera of Saxifragaceae under study, including the large genera Heuchera, Lithophragma, and Mitella; 2. examine the placement of single-species or monotypic genera among such larger, speciose genera; and 3. compare the results from this analysis of DNA with data from other lines of taxonomic evidence such as flavonoid chemistry, chromosomes, and floral morphology. In this way, it will be possible to assess patterns of evolutionary change in morphology, chromosomes, and phytochemistry.

开花植物科植物的先前研究虎耳草科利用形态学，化学，染色体和杂交实验。这些早期调查有助于澄清分类学关系在传统上被认为是麻烦的群体。但考虑到平行的证据，形态学和植物化学的趋同进化其他植物群的特征，这些虎耳草仍然存在问题。道格拉斯·索提斯博士华盛顿州立大学将应用强大的新方法的突变分析叶绿体DNA，和一个较小的核核糖体DNA，以检查进化变化在这个群体中。 Soltis博士的分子系统分析的目标是至：l.构建九个属的系统发育框架研究中的虎耳草科，包括大属Heuchera， Lithophragma和Mitella; 2.检查…的位置在这些较大的，种类繁多的属;和3.将DNA分析结果与来自其他分类学证据的数据，如类黄酮化学、染色体和花的形态。这样就将有可能评估进化变化的模式，形态学染色体和植物化学