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.

大型家族的真正蟾蜍是研究物种多样化的模式和过程的丰富资源，但是如果不了解家庭成员之间的系统发育关系，就无法实现潜力。 Bufonidae没有可用的系统发育假设。 尽管大型家庭禁止估算到物种水平的系统发育，但不需要这种细节来回答许多问题。 取而代之的是，需要理解家庭主要子分和最近分化物种的小进化枝之间的系统发育关系。 这项研究代表了阐明Bufonidae内部发育关系以及将此信息应用于对物种多样化的理解的一种分层方法。 来自代表性物种的DNA序列数据在家庭内部有两个差异的水平：在遥远的物种和一个物种组中，将用于估计这些水平的系统发育关系。 有了远距离相关类群的系统发育假设，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。 通过在一个物种组中的系统发育关系的假设，将研究形成的模式和过程。