Angiosperm Phylogeny: Evidence From rbcL, 18S rDNA, and atpB

被子植物系统发育：来自 rbcL、18S rDNA 和 atpB 的证据

• 批准号: 9707868
• 负责人: Pamela Soltis
• 金额: $ 8.26万
• 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: 1997
• 资助国家: 美国
• 起止时间: 1997-08-01 至 2000-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9707868&HistoricalAwards=false
• 关键词: Angiosperm; Phylogeny; Evidence; rbcL; 18S

9707868 SOLTIS The angiosperms (flowering plants) represent the largest and most economically-important assemblage of land plants in the world, there being over 300,000 different species. Diverse angiosperm forms appear in the fossil record a little over 100 million years ago, and many additional species appear to have arisen rapidly following the origin of the assemblage. However, despite extensive effort, our understanding of relationships among angiosperm groups remains far from complete, especially among groups that arose early during angiosperm diversification. The research proposed by Drs. Soltis and Soltis will help clarify phylogenetic relationships among major groupings of angiosperms, and perhaps more importantly, help identify relationships among the most ancient members of the assemblage. The latter will prove especially critical in providing the basis for new interpretations of the patterns and rates of diversification. The work will entail acquisition of DNA sequences from three distinct genes (rbcL, 18S rDNA, and atpB) that will be used to infer relationships among roughly 400 angiosperm species that were selected as representatives of all major groups of angiosperm species. The work ultimately will lead to a new classification of flowering plants that will reflect more accurately both historical and genealogical relationships. The project also will lead to new analytical methods for inferring family trees that involve extremely large data sets for large groups of species.

9707868 Soltis被子植物(开花植物)代表着世界上最大、最具经济意义的陆地植物组合，有30多万种不同的物种。不同的被子植物形式在1亿多年前的化石记录中出现，随着组合的起源，似乎迅速出现了许多额外的物种。然而，尽管进行了广泛的努力，我们对被子植物类群之间的关系的了解仍然远未完成，特别是在被子植物多样化的早期出现的类群之间。索尔蒂斯博士和索尔蒂斯博士提出的这项研究将有助于澄清被子植物主要类群之间的系统发育关系，或许更重要的是，有助于识别该类群中最古老的成员之间的关系。事实将证明，后者在为多样化的模式和比率提供新的解释的基础方面尤其重要。这项工作需要从三个不同的基因(rbcL、18S rDNA和atpB)中获取DNA序列，用于推断大约400个被子植物物种之间的关系，这些物种被选为被子植物物种所有主要类群的代表。这项工作最终将导致一个新的开花植物分类，将更准确地反映历史和系谱关系。该项目还将导致推断家谱的新分析方法，这些方法涉及针对大物种群体的极大数据集。