Phylogenomic Systematics of Ostariophysan Fishes: Ultraconserved Elements Support the Surprising Non-Monophyly of Characiformes
Phylogenomic Systematics of Ostariophysan Fishes: Ultraconserved Elements Support the Surprising Non-Monophyly of Characiformes
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DOI：
10.1093/sysbio/syx038
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发表时间：
2017-11-01
影响因子：
6.5
通讯作者：
Alfaro, Michael E.
中科院分区：
文献类型：
--
作者：
Chakrabarty, Prosanta;Faircloth, Brant C.;Alfaro, Michael E.
骨海龙目（Ostariophysi）是硬骨鱼的一个总目，包括70科1100属10,300余种。这个总目传统上分为五个主要的类群（目）：Gonorynchiformes（遮流鱼和沙鱼），Cypriniformes（鲤鱼和小鱼），Characiformes（河豚和它们的盟友），Siluriformes（鲶鱼）和Gymnotiformes（电鱼）。这些谱系之间的关系的无敌意决议仍然难以捉摸，与以前的分子和形态学分析未能产生共识的同源性。在这项研究中，我们使用了超过350个超保守元件（UCEs）位点，包括500万个碱基对收集在35个代表性的ostarioprophans物种，编译一个最丰富的数据的鱼类的遗传。我们使用这些数据来推断更高层次（interordinal）的关系ostarioprophans鱼类，专注于单系的Characiformes的鱼类系统学中最有争议的群体之一。与大多数以前的分子研究一样，我们恢复了非单系Characiformes与两个单系亚目，Citharinoidei和Escheroidei，更密切相关的其他ostarioporphan分支比彼此。我们还探讨了不同UCE数据集的结果之间的不一致性，正字法的问题，以及结合我们的分子数据使用形态特征。
Ostariophysi is a superorder of bony fishes including more than 10,300 species in 1100 genera and 70 families. This superorder is traditionally divided into five major groups (orders): Gonorynchiformes (milkfishes and sandfishes), Cypriniformes (carps and minnows), Characiformes (tetras and their allies), Siluriformes (catfishes), and Gymnotiformes (electric knifefishes). Unambiguous resolution of the relationships among these lineages remains elusive, with previous molecular and morphological analyses failing to produce a consensus phylogeny. In this study, we use over 350 ultraconserved element (UCEs) loci comprising 5million base pairs collected across 35 representative ostariophysan species to compile one of the most data-rich phylogenies of fishes to date. We use these data to infer higher level (interordinal) relationships among ostariophysan fishes, focusing on the monophyly of the Characiformes-one of the most contentiously debated groups in fish systematics. As with most previous molecular studies, we recover a non-monophyletic Characiformes with the two monophyletic suborders, Citharinoidei and Characoidei, more closely related to other ostariophysan clades than to each other. We also explore incongruence between results from different UCE data sets, issues of orthology, and the use of morphological characters in combination with our molecular data.