Dissertation Research: A Hierachical Analysis of PhylogenticRelationships in Bufonidae

论文研究：蟾蜍科系统发育关系的层次分析

• 批准号: 9212572
• 负责人: David Wake
• 金额: $ 1.09万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-12-15 至 1995-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9212572&HistoricalAwards=false
• 关键词: Dissertation; Research; Hierachical; Analysis; PhylogenticRelationships

True toads of the large family Bufonidae are a rich resource for studying pattern and process in species diversification, but the potential cannot be realized without an understanding of the phylogenetic relationships among the family's members. There is no robust phylogenetic hypothesis available for Bufonidae. While the large size of the family prohibits the estimation of a phylogeny resolved to the species level, this level of detail is not required to answer many questions. Instead what is needed is an understanding of the phylogenetic relationships among the major subclades of the family and within small clades of recently diverged species. This study represents a hierarchical approach to the elucidation of phylogenetic relationships within Bufonidae and the application of this information to an understanding of species diversification. DNA sequence data from representative species at two levels of divergence within the family: among distantly related species and within one species group, will be used to estimate phylogenetic relationships at these levels. With a phylogenetic hypothesis for the distantly related taxa, two questions will be addressed: 1) biogeographic relationships among continents and 2) morphological innovation. With a hypothesis of phylogenetic relationships within one species group, patterns and processes of speciation will be studied.

蟾蜍大科的真正蟾蜍是研究物种多样化模式和过程的丰富资源，但如果不了解该科成员之间的系统发育关系，就无法实现其潜力。 蟾蜍科没有可靠的系统发育假说。 虽然科的庞大规模阻碍了对物种水平的系统发育的估计，但不需要这种详细程度来回答许多问题。 相反，我们需要的是了解该科的主要分支之间以及最近分化的物种的小分支内的系统发育关系。 这项研究代表了一种阐明蟾蜍科内系统发育关系的分层方法，并将这些信息应用于理解物种多样化。 来自科内两个分歧水平的代表性物种的 DNA 序列数据：远缘物种之间和一个物种组内，将用于估计这些水平上的系统发育关系。 通过对远缘类群的系统发育假说，将解决两个问题：1）大陆之间的生物地理关系和2）形态创新。 通过对一个物种组内的系统发育关系的假设，将研究物种形成的模式和过程。