Phylogenomics reveals a new 'megagroup' including most photosynthetic eukaryotes
Phylogenomics reveals a new 'megagroup' including most photosynthetic eukaryotes
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DOI：
10.1098/rsbl.2008.0224
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发表时间：
2008-08-23
期刊：
影响因子：
3.3
通讯作者：
Pawlowski, Jan
中科院分区：
文献类型：
--
作者：
Burki, Fabien;Shalchian-Tabrizi, Kamran;Pawlowski, Jan
真核生物分子系统发育学的进展表明，其系统树由少数几个超群组成。系统基因组学近期确定了其中一些大型类群之间的关系，但最深的分支节点仍未解决。在此，我们利用迄今为止最广泛的多基因数据集（65个物种，135个基因）研究主要真核生物超群之间的早期进化。我们的分析有力地支持了植物、囊泡虫类、有孔虫类、定鞭藻类和隐藻的聚类，从而将几乎所有光合类群联系起来，并引发了质体可能具有独特起源的问题。在最深层次上，真核生物的系统树现在有力地支持了两个包含大部分真核生物多样性的单系大群。
Advances in molecular phylogeny of eukaryotes have suggested a tree composed of a small number of supergroups. Phylogenomics recently established the relationships between some of these large assemblages, yet the deepest nodes are still unresolved. Here, we investigate early evolution among the major eukaryotic supergroups using the broadest multigene dataset to date (65 species, 135 genes). Our analyses provide strong support for the clustering of plants, chromalveolates, rhizarians, haptophytes and cryptomonads, thus linking nearly all photosynthetic lineages and raising the question of a possible unique origin of plastids. At its deepest level, the tree of eukaryotes now receives strong support for two monophyletic megagroups comprising most of the eukaryotic diversity.