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首页> 外文期刊>Parasitology >Estimating phylogenetic relationships despite discordant gene trees across loci: the species tree of a diverse species group of feather mites (Acari: Proctophyllodidae).
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Estimating phylogenetic relationships despite discordant gene trees across loci: the species tree of a diverse species group of feather mites (Acari: Proctophyllodidae).

机译：尽管基因座之间的基因树不一致，但仍要估算系统发生关系：羽状螨（Acari：Proctophyllodidae）的不同物种组的物种树。

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SUMMARYWith the increased availability of multilocus sequence data, the lack of concordance of gene trees estimated for independent loci has focused attention on both the biological processes producing the discord and the methodologies used to estimate phylogenetic relationships. What has emerged is a suite of new analytical tools for phylogenetic inference - species tree approaches. In contrast to traditional phylogenetic methods that are stymied by the idiosyncrasies of gene trees, approaches for estimating species trees explicitly take into account the cause of discord among loci and, in the process, provides a direct estimate of phylogenetic history (i.e. the history of species divergence, not divergence of specific loci). We illustrate the utility of species tree estimates with an analysis of a diverse group of feather mites, the pinnatus species group (genus Proctophyllodes). Discord among four sequenced nuclear loci is consistent with theoretical expectations, given the short time separating speciation events (as evident by short internodes relative to terminal branch lengths in the trees). Nevertheless, many of the relationships are well resolved in a Bayesian estimate of the species tree; the analysis also highlights ambiguous aspects of the phylogeny that require additional loci. The broad utility of species tree approaches is discussed, and specifically, their application to groups with high speciation rates - a history of diversification with particular prevalence in host/parasite systems where species interactions can drive rapid diversification.
机译：发明内容随着多基因座序列数据的可用性增加，为独立基因座估计的基因树缺乏一致性已经将注意力集中在产生不和谐的生物学过程和用于估计系统发生关系的方法上。出现了一套用于系统发育推断的新分析工具-种树方法。与基因树特质所阻碍的传统系统发育方法相反，物种树的估算方法明确考虑了基因座之间不一致的原因，并在此过程中提供了系统发育历史（即物种历史）的直接估算值差异，而不是特定基因座的差异）。我们通过对羽状螨种类繁多的羽状螨类（Proctophyllodes属）的分析来说明物种树估计的效用。鉴于分离物种形成事件的时间很短（通过相对于树中末端分支长度较短的节间可见），四个测序的核基因座之间的不一致与理论预期相符。尽管如此，许多关系在物种树的贝叶斯估计中得到了很好的解决。该分析还强调了系统发育的不明确方面，需要额外的基因座。讨论了物种树方法的广泛用途，尤其是将其应用于具有高物种形成率的群体-多样化的历史，尤其是在宿主/寄生虫系统中，物种相互作用可以推动快速的多样化。

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