Evolutionary history suggests rapid differentiation in the yellow-throated warbler Dendroica dominica
Evolutionary history suggests rapid differentiation in the yellow-throated warbler Dendroica dominica
复制标题
进化历史表明黄喉莺的快速分化
DOI：
--
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Bailey D. McKay
中科院分区：
文献类型：
--
作者：
Bailey D. McKay
分子工具正在重塑有关北美鸟类多样化时间框架的许多传统范式。系统发育地理学研究对于指导新兴范式已变得至关重要。然而，目前此类研究的数量往往并不均匀地分布在整个景观中，这限制了推论的普遍性。美国东南部是人们对近期鸟类多样化的节奏和模式知之甚少的地区。特别是一个系统发育地理学断裂，汤比格比河不连续性，将阿拉巴马州的东部和西部系统群分开，尽管已知它影响了一些鱼类和爬行动物的系统发育地理模式，但它在促进近期鸟类多样化中的作用尚不清楚。黄喉莺的东部和西部形态亚种沿着汤比格比河不连续性造成的系统发育地理学断裂而划分，这表明这种鸟也受到了这种变化的影响。为了确定黄喉莺的系统发育地理模式是否与这种生物地理屏障一致，我分析了来自该物种分布范围的 109 只黄喉莺的线粒体控制区序列，以及这些样本的子集中性别连锁核基因的序列。发现了相当大的变异，但大多数变异是在种群或亚种内部而不是在种群或亚种之间发现的。浅层系统发育树、星状单倍型网络和单峰错配分布都表明最近的扩张。合并模型表明，现代种群源自单一共同祖先种群，亚种之间在形态、生态和迁徙途径方面的差异是近期快速进化的结果，可能是由选择驱动的。
Molecular tools are reshaping many traditional paradigms concerning the timeframe of avian diversification in North America. Phylogeographic studies have become essential for guiding the emerging paradigms. However, the current pool of such studies tends not to be evenly dispersed across the landscape, which limits the generality of inferences. The southeastern United States is one region where the tempo and mode of recent avian diversification is poorly understood. One phylogeographic break in particular, the Tombigbee River discontinuity, divides eastern and western phylogroups in Alabama, and, though it is known to have influenced the phylogeographic patterns of some fish and reptiles, its role in promoting recent avian diversification is not well understood. Eastern and western morphological subspecies of the yellow-throated warbler Dendroica dominica divide along the phylogeographic break created by the Tombigbee River discontinuity suggesting that this bird was also affected by this vicariance. To determine whether the phylogeographic patterns of the yellow-throated warbler are consistent with this biogeographic barrier, I analyzed mitochondrial control region sequences of 109 yellow-throated warblers from across the species’ range and, from a subset of these samples, sequences from a sex-linked nuclear gene. Considerable variation was uncovered, but most of this variation was found within rather than among populations or subspecies. A shallow phylogenetic tree, star-like haplotype network, and unimodal mismatch distribution all suggested a recent expansion. Coalescent modeling indicated that modern populations are derived from a single common ancestral population and that differences among subspecies in morphology, ecology, and migratory pathways are the result of recent and rapid evolution, possibly driven by selection.
影响因子：
3.3
作者：
Alan R. Templeton;K. Crandall;C. Sing
通讯作者：
Alan R. Templeton;K. Crandall;C. Sing
影响因子：
3.3
作者：
Yunxin Fu
通讯作者：
Yunxin Fu
影响因子：
3.3
作者：
L. Excoffier;P. Smouse;J. Quattro
通讯作者：
L. Excoffier;P. Smouse;J. Quattro