Strepsiptera, phylogenomics and the long branch attraction problem.
Strepsiptera, phylogenomics and the long branch attraction problem.
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DOI：
10.1371/journal.pone.0107709
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Huelsenbeck JP
中科院分区：
文献类型：
--
作者：
Boussau B;Walton Z;Delgado JA;Collantes F;Beani L;Stewart IJ;Cameron SA;Whitfield JB;Johnston JS;Holland PW;Bachtrog D;Kathirithamby J;Huelsenbeck JP
随着测序技术的进步，昆虫系统发育学最近重新成为人们关注的焦点，因为测序技术的进步使快速产生感兴趣物种的大量基因组或转录数据成为可能。然而，大量的标记并不足以保证准确的系统发育重建，序列进化模式的选择以及足够的分类采样对于系统发育研究和单基因系统发育同样重要。最近，链翅目昆虫的基因组序列被公布，并被用来将链翅目列为鞘翅目的姊妹群。然而，这一结论所依据的数据集并不包括脉翅目或之前提出的与链翅目有关的鞘翅目谱系的代表。此外，它没有使用对长树枝吸引伪像具有健壮性的模型。在这里，我们对7个关键物种的转录本进行了测序，以完成一个由36个物种组成的数据集，用于研究昆虫的高级系统发育，重点是脉翅目(鞘翅目，链翅目，脉翅目)，特别是被认为是链翅目潜在近亲的鞘翅目分类群。利用对长枝吸引现象的稳健模型，我们发现了高度分辨的系统发育，证实了链翅目是鞘翅目的姊妹群，而不是鞘翅目的内部分支，并为脉翅目的系统发育提供了新的线索。
Insect phylogeny has recently been the focus of renewed interest as advances in sequencing techniques make it possible to rapidly generate large amounts of genomic or transcriptomic data for a species of interest. However, large numbers of markers are not sufficient to guarantee accurate phylogenetic reconstruction, and the choice of the model of sequence evolution as well as adequate taxonomic sampling are as important for phylogenomic studies as they are for single-gene phylogenies. Recently, the sequence of the genome of a strepsipteran has been published and used to place Strepsiptera as sister group to Coleoptera. However, this conclusion relied on a data set that did not include representatives of Neuropterida or of coleopteran lineages formerly proposed to be related to Strepsiptera. Furthermore, it did not use models that are robust against the long branch attraction artifact. Here we have sequenced the transcriptomes of seven key species to complete a data set comprising 36 species to study the higher level phylogeny of insects, with a particular focus on Neuropteroidea (Coleoptera, Strepsiptera, Neuropterida), especially on coleopteran taxa considered as potential close relatives of Strepsiptera. Using models robust against the long branch attraction artifact we find a highly resolved phylogeny that confirms the position of Strepsiptera as a sister group to Coleoptera, rather than as an internal clade of Coleoptera, and sheds new light onto the phylogeny of Neuropteroidea.
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