Collaborative Research: Phylogenetic Analysis Dalechampia (Euphorbiaceae) using DNA and Morphological Data

合作研究：利用 DNA 和形态数据对 Dalechampia（大戟科）进行系统发育分析

• 批准号: 9318490
• 负责人: Bruce Baldwin
• 金额: $ 10.44万
• 依托单位: Duke University
• 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: 1994-03-01 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9318490&HistoricalAwards=false
• 关键词: Collaborative; Research; Phylogenetic; Analysis; Dalechampia

9318490 Baldwin Understanding the taxonomic relationships, evolution, and biogeographic history of organisms depends upon accurate phylogenetic information, that is, knowledge of the genealogy of the group. Dr. Bruce Baldwin of Duke University in collaboration with Dr. Scott Armbruster of the University of Alaska is reconstructing the phylogeny of Old and New World species of the pantropical plant genus Dalechampia (Euphorbiaceae family) in order to gain insights into the evolution of the group's pollination system and its biogeographic history. Specific objectives include: 1. to collect liquid-preserved and herbarium specimens for morphological analysis and for DNA sequencing of chloroplast and nuclear ribosomal genes; 2. to determine the pollination ecology of a sample of Old World taxa, thus complementing knowledge of New World species; 3. to reconstruct the phylogenetic pattern of species divergences using nuclear and chloroplast DNA data and morphology; and 4. to use the phylogeny to trace the biogeographic history of the group and to generate testable hypotheses about change in pollination ecology and floral form. The application of phylogenetic information to evolutionary biology and ecology has generated considerable excitement in recent times. Important features of studying evolution with an estimated phylogeny include the ability to infer long-term evolutionary history of characteristics not preserved in the fossil record, such as ecological relationships between plants and animals, and to distinguish adaptive evolution from the effects of phylogenetic constraint and past stochastic events. The Armbruster and Baldwin project will advance that agenda.

9318490 Baldwin 了解生物体的分类关系、进化和生物地理历史取决于准确的系统发育信息，即群体谱系的知识。 杜克大学的 Bruce Baldwin 博士与阿拉斯加大学的 Scott Armbruster 博士合作，正在重建泛热带植物属 Dalechampia（大戟科）的新旧世界物种的系统发育，以便深入了解该群体的进化授粉系统及其生物地理历史。 具体目标包括： 1. 收集液体保存标本和植物标本，用于形态学分析以及叶绿体和核核糖体基因的 DNA 测序； 2. 确定旧世界类群样本的授粉生态，从而补充新世界物种的知识； 3. 利用核和叶绿体 DNA 数据和形态重建物种分化的系统发育模式； 4. 利用系统发育来追踪该群体的生物地理历史，并生成有关授粉生态和花形态变化的可检验假设。 近年来，系统发育信息在进化生物学和生态学中的应用引起了相当大的关注。 通过估计的系统发育研究进化的重要特征包括能够推断化石记录中未保存的特征的长期进化历史，例如植物和动物之间的生态关系，并将适应性进化与系统发育限制和过去的影响区分开来。随机事件。 Armbruster 和 Baldwin 项目将推进这一议程。