Laboratório de Genética & Biodiversidade, Instituto de Ciências Biológicas, Universidade Federal de Goiás (UFG), Campus Samambaia, 74001-970 Goiânia, Goiás, Brazil.
Laboratório de Herpetologia e Comportamento Animal, Departamento de Ecologia, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Campus Samambaia, 74001-970 Goiânia, Goiás, Brazil.
Mol Phylogenet Evol. 2019 Mar;132:67-80. doi: 10.1016/j.ympev.2018.11.003. Epub 2018 Nov 30.
Here we reconstructed the demographical history and the dispersal dynamics of Physalemus cuvieri through the Neogene-Quaternary periods by coupling DNA regions with different mutation rates, ecological niche modelling, reconstruction of spatio-temporal lineage dispersal and coalescent simulations. Still, to test alternative diversification scenarios we used approximate Bayesian computation. Molecular phylogenetic analysis recovered four deep and strongly supported clades, which we interpret as population lineages. The ancestral location reconstruction placed the root in southcentral Amazonia, and the dispersal events indicate that spatial displacement was widespread early in the diversification of this species. The demographical scenario of "Multiple Refugia" with recent lineage admixture was the most likely hypothesis to predict the observed genetic parameters of P. cuvieri. Our results revealed that Neogene orogenic events might have played a prominent role in the early diversification of P. cuvieri. The species shows deep divergences with strong regional population structure, despite its widespread distribution. Final uplift of the central Brazilian Plateau and formation of the river basins in Central South America played an important role in the origin, diversification and the maintenance of P. cuvieri lineages.
在这里，我们通过结合具有不同突变率的 DNA 区域、生态位建模、时空谱系扩散重建和合并模拟，重构了 Physalemus cuvieri 在新近纪-第四纪时期的人口历史和扩散动态。尽管如此，为了测试替代的多样化情景，我们还是使用了近似贝叶斯计算。分子系统发育分析恢复了四个深度和强烈支持的分支，我们将其解释为种群谱系。祖先位置重建将根置于亚马逊中南部，而扩散事件表明，在该物种的早期多样化过程中，空间位移是广泛存在的。“多个避难所”的人口统计学情景与最近的谱系混合是最有可能的假设，可以预测 P. cuvieri 的观察到的遗传参数。我们的结果表明，新近纪造山事件可能在 P. cuvieri 的早期多样化中发挥了重要作用。尽管分布广泛，但该物种表现出深度分歧和强烈的区域种群结构。巴西中部高原的最终隆起和中美洲流域的形成在 P. cuvieri 谱系的起源、多样化和维持中发挥了重要作用。
