Spatiotemporal Diversification of the True Frogs (Genus Rana): A Historical Framework for a Widely Studied Group of Model Organisms
Spatiotemporal Diversification of the True Frogs (Genus Rana): A Historical Framework for a Widely Studied Group of Model Organisms
复制标题
真正的青蛙（林蛙属）的时空多样化：广泛研究的模式生物群的历史框架
DOI：
10.1093/sysbio/syw055
复制
发表时间：
2016-09-01
影响因子：
6.5
通讯作者：
Che, Jing
中科院分区：
文献类型：
--
作者：
Yuan, Zhi-Yong;Zhou, Wei-Wei;Che, Jing
真正的蛙类被广泛地用作发育、遗传学、生理学、生态学、行为和进化研究的模式生物。对100多种林蛙的比较研究有赖于对该种群的进化史和多样化模式的了解。我们从林蛙属大多数物种的六个核基因座和三个线粒体基因座的序列中估计了一个分辨率良好、时间校准的系统发育图，并利用该系统发育图阐明了该群体的多样性和全球生物地理。我们的分析一贯支持“走出亚洲”的模式，即通过柏林大陆桥将两个独立的拉纳种群从东亚扩散到北美。新大陆林蛙物种丰富的谱系似乎在它殖民新大陆后经历了快速的辐射，特别是随着它扩展到墨西哥、中美洲和南美洲的山地和热带地区。相比之下，东半球林蛙表现出不同的多样化轨迹；东半球的多样化开始时非常缓慢，后来在29-18 Ma左右经历了物种形成率的显著增加。净多样化与环境变化，特别是从渐新世到中新世早期沿亚洲边缘的强烈构造运动有关。我们的系统发育进一步表明，以前的分类受到形态同质性和半形性颜色模式的误导，以及主要依赖线粒体基因。我们基于对多个核和线粒体基因座的分析，提供了一个系统发育分类学。
True frogs of the genus Rana are widely used as model organisms in studies of development, genetics, physiology, ecology, behavior, and evolution. Comparative studies among the more than 100 species of Rana rely on an understanding of the evolutionary history and patterns of diversification of the group. We estimate a well-resolved, time-calibrated phylogeny from sequences of six nuclear and three mitochondrial loci sampled from most species of Rana, and use that phylogeny to clarify the group's diversification and global biogeography. Our analyses consistently support an "Out of Asia" pattern with two independent dispersals of Rana from East Asia to North America via Beringian land bridges. The more species-rich lineage of New World Rana appears to have experienced a rapid radiation following its colonization of the New World, especially with its expansion into montane and tropical areas of Mexico, Central America, and South America. In contrast, Old World Rana exhibit different trajectories of diversification; diversification in the Old World began very slowly and later underwent a distinct increase in speciation rate around 29-18 Ma. Net diversification is associated with environmental changes and especially intensive tectonic movements along the Asian margin from the Oligocene to early Miocene. Our phylogeny further suggests that previous classifications were misled by morphological homoplasy and plesiomorphic color patterns, as well as a reliance primarily on mitochondrial genes. We provide a phylogenetic taxonomy based on analyses of multiple nuclear and mitochondrial gene loci.