DISSERTATION RESEARCH: Phylogenetic Implications of Hybridization in the Phlox pilosa Complex (Polemoniaceae): Diploid Hybrid Origin of Taxa

9623386詹森该奖项将提供资金的材料和用品以及旅行资金的详细人口研究在美国东南部。 支持将加强卡罗琳弗格森谁是研究生与博士的论文。罗伯特詹森在得克萨斯大学奥斯汀分校。 该学生的论文项目涉及到在福禄考物种复杂的分类群的分子序列数据的系统发育分析。 这组植物是特别感兴趣的，因为它已被建议，一些类群是杂交起源的二倍体水平，物种形成机制，被认为是罕见的，需要进一步调查。 数据将获得叶绿体限制性位点分析和核ITS测序和不一致，在所产生的同源性应阐明二倍体杂交起源的问题。 此外，分子标记将用于详细的人口水平的研究，在美国东南部的一个案例研究假定福禄考二倍体杂交。 该奖项将为研究生提供支持，研究物种复合体中植物之间的关系，包括被认为是二倍体杂交起源的分类群。 仔细的种群水平分析将记录这种有趣的和被认为是罕见的物种起源机制。支持对研究生进行现代系统和种群生物学方法方面的培训，对于维持一支能够处理日益引起全球关注的生物多样性问题的科学工作队伍十分重要。

9623386 JANSEN This award will provide funds for materials and supplies as well as travel funds for detailed population studies in the southeastern United States. The support will enhance the dissertation of Carolyn Ferguson who is a graduate student with Dr. Robert Jansen at University of Texas, Austin. The student's dissertation project involves phylogenetic analysis of molecular sequence data for taxa in the Phlox pilosa species complex. This group of plants is of particular interest because it has been suggested that some of the taxa are of hybrid origin at the diploid level, a speciation mechanism that is presumed to be rare and bears further investigation. Data will be obtained for chloroplast restriction site analysis and nuclear ITS sequencing and incongruities in the resultant phylogenies should illuminate the question of diploid hybrid origins. In addition, molecular markers will be utilized in detailed population level studies for a case study of putative Phlox diploid hybridization in the southeastern United States. This award will provide support for a graduate student pursuing studies of relationships among plants in a species complex including taxa believed to be of diploid hybrid origin. Careful population level analysis will document this interesting and believed rare mechanism for the origin of species. Support for the training of graduate students in modern systematic and population biology methodologies is important for maintaining the workforce of scientists capable of addressing the questions and issues of biodiversity which are of increasing global concern.