Genetic connectivity among swarming sites in the wide ranging and recently declining little brown bat (Myotis lucifugus)

Characterizing movement dynamics and spatial aspects of gene flow within a species permits inference on population structuring. As patterns of structuring are products of historical and current demographics and gene flow, assessment of structure through time can yield an understanding of evolutionary dynamics acting on populations that are necessary to inform management. Recent dramatic population declines in hibernating bats in eastern North America from white-nose syndrome have prompted the need for information on movement dynamics for multiple bat species. We characterized population genetic structure of the little brown bat, Myotis lucifugus, at swarming sites in southeastern Canada using 9 nuclear microsatellites and a 292-bp region of the mitochondrial genome. Analyses of FST, ΦST, and Bayesian clustering (STRUCTURE) found weak levels of genetic structure among swarming sites for the nuclear and mitochondrial genome (Global FST = 0.001, P < 0.05, Global ΦST = 0.045, P < 0.01...

解析物种内基因流的运动动态与空间特征，可为种群结构推断提供依据。种群结构模式是历史与当代种群动态及基因流共同作用的产物，通过时间维度的种群结构评估，可解析作用于种群的进化动态，相关认知可为物种管理提供必要依据。近期北美东部冬眠蝙蝠因白鼻综合征（white-nose syndrome）出现种群数量急剧下降，因此亟需获取多种蝙蝠的运动动态相关数据。本研究以加拿大东南部交配集群位点的小棕蝠（Myotis lucifugus）为研究对象，利用9个核微卫星标记（nuclear microsatellites）和一段292bp的线粒体基因组区域作为分子标记，解析其种群遗传结构。通过FST（F-statistic）、ΦST以及贝叶斯聚类分析（STRUCTURE）的结果显示，各交配集群位点间的核基因组与线粒体基因组均仅存在微弱的遗传结构分化：全局FST=0.001，P<0.05，全局ΦST=0.045，P<0.01……