Ant phylogenomics reveals a natural selection hotspot preceding the origin of complex eusociality.

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Serval ID
serval:BIB_A558C4072C0C
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Ant phylogenomics reveals a natural selection hotspot preceding the origin of complex eusociality.
Journal
Current biology
Author(s)
Romiguier J., Borowiec M.L., Weyna A., Helleu Q., Loire E., La Mendola C., Rabeling C., Fisher B.L., Ward P.S., Keller L.
ISSN
1879-0445 (Electronic)
ISSN-L
0960-9822
Publication state
Published
Issued date
11/07/2022
Peer-reviewed
Oui
Volume
32
Number
13
Pages
2942-2947.e4
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
The evolution of eusociality has allowed ants to become one of the most conspicuous and ecologically dominant groups of organisms in the world. A large majority of the current ∼14,000 ant species belong to the formicoids, <sup>1</sup> a clade of nine subfamilies that exhibit the most extreme forms of reproductive division of labor, large colony size, <sup>2</sup> worker polymorphism, <sup>3</sup> and extended queen longevity. <sup>4</sup> The eight remaining non-formicoid subfamilies are less well studied, with few genomes having been sequenced so far and unclear phylogenetic relationships. <sup>5</sup> By sequencing 65 genomes, we provide a robust phylogeny of the 17 ant subfamilies, retrieving high support to the controversial leptanillomorph clade (Leptanillinae and Martialinae) as the sister group to all other extant ants. Moreover, our genomic analyses revealed that the emergence of the formicoids was accompanied by an elevated number of positive selection events. Importantly, the top three gene functions under selection are linked to key features of complex eusociality, with histone acetylation being implicated in caste differentiation, gene silencing by RNA in worker sterility, and autophagy in longevity. These results show that the key pathways associated with eusociality have been under strong selection during the Cretaceous, suggesting that the molecular foundations of complex eusociality may have evolved rapidly in less than 20 Ma.
Keywords
Animals, Ants/genetics, Phylogeny, Reproduction/genetics, Selection, Genetic, Social Behavior, ant, complex eusociality, formicoid, leptanillomorphs, natural selection, phylogenomics
Pubmed
Create date
17/06/2022 13:06
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04/11/2022 6:37
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