Population genetic structure and demographic history of the endemic Formosan lesser horseshoe bat (Rhinolophus monoceros)
Population genetic structure and demographic history of the endemic Formosan lesser horseshoe bat (Rhinolophus monoceros)
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DOI：
10.1111/j.1365-294x.2006.02879.x
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发表时间：
2006-05-01
影响因子：
4.9
通讯作者：
Jones, G
中科院分区：
文献类型：
--
作者：
Chen, SF;Rossiter, SJ;Jones, G
种内遗传学可以提供有用的见解如何人口已形成的历史和当代的进程。台湾形成于大约500万年前的构造隆起，自出现以来多次与亚洲大陆相连。中部山脉从北向南延伸，将岛屿一分为二，并可能阻碍基因沿沿着东西轴线流动。台湾菊头蝠（Rhinolophus monoceros）是台湾特有的动物，主要分布在低海拔地区。为了确定该物种的人口结构和人口统计学和殖民历史，我们研究了在26个地点采样的203只蝙蝠的线粒体DNA控制区的变化。我们发现非常高的单倍型和核苷酸多样性，从中心到南部和北部减少。种群分化遵循的模式隔离的距离，虽然大多数区域的遗传变异是由于相对孤立的南方人口和其他地区之间的差异。一个单倍型网络与这些研究结果是一致的，也表明了向南殖民，随后南部和其他地区之间的二次接触。错配分布被用来推断在末次盛冰期之前的种群扩张，相邻连接树显示R。独角兽形成了一个单系群关于它的姐妹类群。两者合计，我们的研究结果表明，这个分类群产生于一个单一的殖民时期，人口增长，随后在更新世晚期。目前的遗传结构反映了有限的基因流，可能再加上逐步殖民在过去。我们认为，通过多个冰川极大的物种的持久性的解释。
Intraspecific phylogenies can provide useful insights into how populations have been shaped by historical and contemporary processes. Taiwan formed around 5 million years ago from tectonic uplift, and has been connected to mainland Asia several times since its emergence. A central mountain range runs north to south, bisecting the island, and potentially impedes gene flow along an east-west axis. The Formosan lesser horseshoe bat (Rhinolophus monoceros) is endemic to Taiwan, where it is found mainly at low altitude. To determine the population structure and the demographic and colonization history of this species, we examined variation in the mitochondrial DNA control region in 203 bats sampled at 26 sites. We found very high haplotype and nucleotide diversity, which decreased from the centre to the south and north. Population differentiation followed a pattern of isolation by distance, though most regional genetic variance was attributable to differences between the relatively isolated southern population and those from other regions. A haplotype network was consistent with these findings and also suggested a southward colonization, followed by subsequent secondary contact between the south and other regions. Mismatch distributions were used to infer a past population expansion predating the last glacial maximum, and a neighbour-joining tree showed that R. monoceros formed a monophyletic grouping with respect to its sister taxa. Taken together, our results suggest that this taxon arose from a single period of colonization, and that demographic growth followed in the late Pleistocene. Current genetic structure reflects limited gene flow, probably coupled with stepwise colonization in the past. We consider explanations for the persistence of the species through multiple glacial maxima.