Phylogenomic data reveal reticulation and incongruence among mitochondrial candidate species in Dusky Salamanders (Desmognathus).,Molecular Phylogenetics and Evolution

当前位置： X-MOL 学术 › Mol. Phylogenet. Evol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Phylogenomic data reveal reticulation and incongruence among mitochondrial candidate species in Dusky Salamanders (Desmognathus).
Molecular Phylogenetics and Evolution ( IF 3.6 ) Pub Date : 2020-02-03 , DOI: 10.1016/j.ympev.2020.106751
R Alexander Pyron ₁ , Kyle A O'Connell ₂ , Emily Moriarty Lemmon ₃ , Alan R Lemmon ₄ , David A Beamer ₅

Affiliation

Gene flow between evolutionarily distinct lineages is increasingly recognized as a common occurrence. Such processes distort our ability to diagnose and delimit species, as well as confound attempts to estimate phylogenetic relationships. A conspicuous example is Dusky Salamanders (Desmognathus), a common model-system for ecology, evolution, and behavior. Only 22 species are described, 7 in the last 40 years. However, mitochondrial datasets indicate the presence of up to 45 "candidate species" and multiple paraphyletic taxa presenting a complex history of reticulation. Some authors have even suggested that the search for species boundaries in the group may be in vain. Here, we analyze nuclear and mitochondrial data containing 161 individuals from at least 49 distinct evolutionary lineages that we treat as candidate species. Concatenated and species-tree methods do not estimate fully resolved relationships among these taxa. Comparing topologies and applying methods for estimating phylogenetic networks, we find strong support for numerous instances of hybridization throughout the history of the group. We suggest that these processes may be more common than previously thought across the phylogeography-phylogenetics continuum, and that while the search for species boundaries in Desmognathus may not be in vain, it will be complicated by factors such as crypsis, parallelism, and gene-flow.

中文翻译：

系统生物学数据揭示了暗Sal（Desmognathus）中线粒体候选物种之间的网状结构和不一致。

进化上不同的谱系之间的基因流越来越被认为是常见现象。这样的过程扭曲了我们诊断和划定物种的能力，以及估计系统发育关系的混淆尝试。一个明显的例子是Dusky Salamanders（Desmognathus），它是生态，进化和行为的通用模型系统。仅描述了22种，在过去40年中有7种。但是，线粒体数据集表明存在多达45种“候选物种”和多种共生类群，从而呈现出复杂的网状历史。一些作者甚至建议寻找该物种物种边界可能是徒劳的。在这里，我们分析了核和线粒体数据，这些数据包含来自至少49个不同进化谱系的161个个体，我们将其视为候选物种。级联和物种树方法无法估计这些分类单元之间的完全解析关系。比较拓扑和估算系统进化网络的方法，我们发现在整个小组历史上对众多杂交实例的大力支持。我们建议，这些过程可能比以前在系统学-系统发生学连续性领域中所认为的更为普遍，并且尽管在地龙属中寻找物种边界的工作可能不会徒劳，但由于诸如低温，平行性和基因调控等因素，这将变得很复杂。流。

更新日期：2020-02-03

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11