A Phylogenetic Analysis of the Monocots Based on Molecular and Morphological Character Sets

基于分子和形态特征集的单子叶植物系统发育分析

• 批准号: 9727000
• 负责人: Jerrold Davis
• 金额: --
• 依托单位: Cornell Univ - State: AWDS MADE PRIOR MAY 2010
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-05-01 至 2002-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9727000&HistoricalAwards=false
• 关键词: Phylogenetic; Analysis; Monocots; Based; Molecular

9727000 Davis A PHYLOGENETIC ANALYSIS OF THE MONOCOTS BASED ON MOLECULAR AND MORPHOLOGICAL CHARACTER SETS The monocotyledons are one of the major groups of flowering plants (angiosperms). This is a diverse group of about 60,000 species that includes the grasses (wheat, maise, rice, and their many wild relatives), palms, and orchids. Although the monocot group is widely recognized as a natural (monophyletic) lineage within the flowering plants, many aspects of the history of divergence of the principal lineages within this group remain obscure. Support for several major lineagess is well established (e.g., the order Poales, which includes grasses and their relatives, and the order Zingiberales, which includes the gingers, the bananas, and their relatives), but there are major differences in the other higher-level groupings recognized by various comprehensive accounts of the monocots. Phylogenetic analyses based on variation in morphology and a variety of molecular characteristics, have yielded conflicting results which Dr. Davis' study will investigate using "total evidence" in which multiple character sets will be collected for exemplar species; these will be combined within a single data set and analyzed as a unit. Data sets to be analyzed include 1) morphology with features of anatomy, pollen structure, and seed development included, 2) DNA sequence variation from genes of the chloroplasts (rbcL) and mitochondria (atpA), and 3) additional character sets being generated by other cooperating investigators.

9727000 Davis 基于分子和形态特征集的单子叶植物的系统发育分析 单子叶植物是开花植物（被子植物）的主要类群之一。这是一个由约 60,000 个物种组成的多样化群体，其中包括禾本科植物（小麦、玉米、水稻及其许多野生近缘植物）、棕榈树和兰花。尽管单子叶植物群被广泛认为是开花植物中的天然（单系）谱系，但该类群内主要谱系分化历史的许多方面仍然不清楚。对几个主要谱系的支持已得到充分证实（例如 Poales 目，包括草及其近缘植物，以及 Zingiberales 目，包括生姜、香蕉及其近缘植物），但在其他高等谱系中存在重大差异。单子叶植物的各种综合帐户所认可的水平分组。基于形态变化和各种分子特征的系统发育分析产生了相互矛盾的结果，戴维斯博士的研究将使用“全面证据”进行调查，其中将收集示例物种的多个特征集。这些将被合并到一个数据集中并作为一个单元进行分析。要分析的数据集包括 1) 具有解剖学、花粉结构和种子发育特征的形态学，2) 叶绿体 (rbcL) 和线粒体 (atpA) 基因的 DNA 序列变异，以及 3) 由其他合作调查人员。