New insights on the evolutionary relationships between the major lineages of Amoebozoa.

New insights on the evolutionary relationships between the major lineages of Amoebozoa.
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关于变形虫主要谱系之间进化关系的新见解。

DOI:
10.1038/s41598-022-15372-7
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发表时间:
2022-07-01
期刊:
影响因子:
4.6
通讯作者:
Smirnov, Alexey
Smirnov, Alexey
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Tekle, Yonas, I;Wang, Fang;Wood, Fiona C.;Anderson, O. Roger;Smirnov, Alexey

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The supergroup Amoebozoa unites a wide diversity of amoeboid organisms and encompasses enigmatic lineages that have been recalcitrant to modern phylogenetics. Deep divergences, taxonomic placement of some key taxa and character evolution in the group largely remain poorly elucidated or controversial. We surveyed available Amoebozoa genomes and transcriptomes to mine conserved putative single copy genes, which were used to enrich gene sampling and generate the largest supermatrix in the group to date; encompassing 824 genes, including gene sequences not previously analyzed. We recovered a well-resolved and supported tree of Amoebozoa, revealing novel deep level relationships and resolving placement of enigmatic lineages congruent with morphological data. In our analysis the deepest branching group is Tubulinea. A recent proposed major clade Tevosa, uniting Evosea and Tubulinea, is not supported. Based on the new phylogenetic tree, paleoecological and paleontological data as well as data on the biology of presently living amoebozoans, we hypothesize that the evolution of Amoebozoa probably was driven by adaptive responses to a changing environment, where successful survival and predation resulted from a capacity to disrupt and graze on microbial mats-a dominant ecosystem of the mid-Proterozoic period of the Earth history.
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