Dissertation Research: Phylogeny and Character Evolution in Yucca L. Based upon Morphological and Molecular Analyses

论文研究：基于形态学和分子分析的丝兰系统发育和性状进化

• 批准号: 9410882
• 负责人: Beryl Simpson
• 金额: $ 0.65万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-15 至 1996-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9410882&HistoricalAwards=false
• 关键词: Dissertation; Research; Phylogeny; Character; Evolution

9410882 Simpson Graduate student Karen Clary, under the supervision of faculty adviser Beryl Simpson at the University of Texas, is studying the taxonomy and phylogeny of the desert genus Yucca, estimated to encompass ca. 35 species in Mexico and the U.S. Morphological, anatomical, and molecular (DNA) analyses are being conducted to provide comparative data for assessing genealogical affinities. The internal transcribed spacer region of the nuclear ribosomal DNA repeat will be sequenced to determine mutational differences in nucleotide composition among species. Results from nuclear DNA analyses will be compared to those based upon chloroplast DNA studies for the same species. Molecular and morphological characters will be combined to achieve a reliable classification of the plants. An understanding of patterns of diversity in molecular and morphological features in Yucca will provide answers about the origin of the genus and its evolution in relation to desert conditions, in general, and in particular should prove interesting when compared with phylogenetic data on yucca moths, the chief pollinators of these plants.

小行星9410882 研究生凯伦·克拉里（Karen Clary）在得克萨斯大学教师顾问贝丽尔·辛普森（Beryl Simpson）的指导下，正在研究沙漠丝兰属的分类学和进化史，估计包括ca。墨西哥和美国的35个物种正在进行形态，解剖和分子（DNA）分析，以提供评估系谱亲缘关系的比较数据。 将对核核糖体DNA重复序列的内转录间隔区进行测序，以确定种属间核苷酸组成的突变差异。 核DNA分析的结果将与基于同一物种叶绿体DNA研究的结果进行比较。 将分子和形态特征相结合，以实现可靠的植物分类。 在丝兰的分子和形态特征的多样性模式的理解将提供答案的属的起源和它的进化在沙漠条件下，在一般情况下，特别是应该证明有趣的丝兰蛾，这些植物的首席传粉者的系统发育数据相比。