NSF/Alfred P. Sloan Foundation Postdoctoral Research Fellowship in Molecular Evolution for FY 1997

摘要 DBI 9750051 Richard E.布劳顿 这一行动为1997年的NSF/Alfred P. Sloan分子进化博士后研究奖学金提供资金。 这些奖学金支持研究涉及的理论，比较，计算，和/或实验分析的生物模式和过程在分子水平的框架内器官的进化变化和适应。 这些研究还包括使用分子数据来解决更广泛的进化问题。 每项研究金资助一项研究和培训计划，该计划将在一个赞助实验室进行。 该研究金的研究和培训计划题为“将多基因座系谱应用于分子进化和物种分歧”。“这项研究的总体目标是了解自然种群中遗传变异的起源和维持。 基因谱系正在产生的三个密切相关的物种的蟋蟀（属蟋蟀）的五个核位点。 一系列问题正在得到解决。 来自不同基因座的基因树在结构和/或长度上有何不同？ 关于自然选择、重组、种群细分和种群规模波动的相对影响，不同的基因遗传学说明了什么？ 两个同时杂交的物种是否在持续接触或地理隔离的情况下在假定其目前的分布之前发生了分歧？

Abstract DBI 9750051 Richard E. Broughton This action funds an NSF/Alfred P. Sloan Postdoctoral Research Fellowship in Molecular Evolution for 1997. These fellowships support studies involving the theoretical, comparative, computational, and/or experimental analyses of biological patterns and processes at the molecular level within the framework of organismic evolutionary change and adaptation. These studies also include the use of molecular data to address broader evolutionary questions. Each fellowship supports a research and training plan to be carried out in a sponsoring laboratory. The research and training plan for this fellowship is entitled "Applying multiple locus genealogies to molecular evolution and species divergence." The overall goal of the research is to understand the origin and maintenance of genetic variation in natural populations. Gene genealogies are being generated from five nuclear loci for three closely related species of field crickets (genus Gryllus). A series of questions are being addressed. How do gene trees from different loci differ in structure and/or length? What do different gene phylogenies indicate about the relative effects of natural selection, recombination, population subdivision, and population size fluctuation? Did two concurrently hybridizing species diverge while in continuous contact, or in geographic isolation prior to assuming their present distributions?