Two aspects along the continuum of pigeon evolution: A South-Pacific radiation and the relationship of pigeons within Neoaves
Two aspects along the continuum of pigeon evolution: A South-Pacific radiation and the relationship of pigeons within Neoaves
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DOI：
10.1016/j.ympev.2010.04.016
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发表时间：
2010-08-01
影响因子：
4.1
通讯作者：
Penny, David
中科院分区：
文献类型：
--
作者：
Gibb, Gillian C.;Penny, David
系统发育学探索类群之间从浅到深的遗传差异的连续性。沿着这个连续体，DNA序列长度的增加可以用来回答越来越深入的关于生物关系的问题。我们使用先短后长的线粒体 DNA 序列来解决鸽子进化的两个方面。首先，我们研究了南太平洋 Ducula-Ptilinopus 辐射中八个属的系统发育关系，并研究了这种辐射如何适合鸽子。在 Ducula 中，类群密切相关，而 Ptilinopus 则非常多样化且并系。所有鸽子物种中有三分之一位于 Ducula-Ptilinopus 辐射范围内，但所有鸽子在生态上都非常相似。其次，我们研究有关鸽子与其他鸟类关系的更深层次的系统发育问题。为此，我们报告了 Hemiphaga novaeseelandiae（Ducula-Ptilinopus 辐射成员）的完整线粒体基因组。我们使用这个线粒体基因组以及其他沙鸡（Pterocles namaqua）线粒体基因来评估鸽子近亲的各种候选者。在鹦鹉、滨鸟和沙鸡中，我们发现沙鸡-鸽子类群的支持率最高。此外，在这些分析中，鸽子和沙鸡类群比任何其他包含的分类单元更接近猎鹰。鸽子和沙鸡与猎鹰的关系可能比与滨鸟或鹦鹉等先前候选者的关系更密切，这一发现需要进一步调查。 (C) 2010 Elsevier Inc. 保留所有权利。
Phylogenetics explores the continuum of shallower to deeper genetic divergences between taxa. Along this continuum increasing lengths of DNA sequence can be used to answer deeper and deeper questions about biological relationships. We use shorter, and then longer mitochondrial DNA sequences to address two aspects of pigeon evolution. Firstly, we examine the phylogenetic relationships of the eight genera within the South Pacific Ducula-Ptilinopus radiation, and examine how this radiation fits into pigeons generally. Within Ducula, taxa are closely related, whereas Ptilinopus is very diverse, and paraphyletic. One third of all pigeon species are within the Ducula-Ptilinopus radiation, however all are very similar ecologically. Secondly, we study the deeper phylogenetic question regarding the relationship of pigeons to other birds. To this end, we report the complete mitochondrial genome of Hemiphaga novaeseelandiae, a member of the Ducula-Ptilinopus radiation. We use this mitochondrial genome, along with additional sandgrouse (Pterocles namaqua) mitochondrial genes to assess various candidates for the closest relative of pigeons. Of parrots, shorebirds, and sandgrouse, we find highest support for the sandgrouse-pigeon grouping. Furthermore in these analyses the pigeon and sandgrouse group closer to the falcons than any other included taxon. The finding that pigeons and sandgrouse may be more closely related to falcons than to previous candidates such as shorebirds or parrots invites further investigation. (C) 2010 Elsevier Inc. All rights reserved.