Section: Evolutionary Biology
Topic: Evolution, Genetics/genomics, Population biology

The impact of social complexity on the efficacy of natural selection in termites

Corresponding author(s): Roux, Camille (camille.roux@univ-lille.fr); Romiguier, Jonathan (jonathan.romiguier@umontpellier.fr)

10.24072/pcjournal.476 - Peer Community Journal, Volume 4 (2024), article no. e101.

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In eusocial species, reproduction is monopolized by a few reproductive individuals.From the perspective of population genetics, this implies that the effective population size (Ne) of these organisms is likely to be smaller compared to solitary species, as has been proposed in the literature for eusocial hymenoptera. In this study, we investigate the genomic consequences of eusociality in termites (Isoptera) on two different timescales. First, by analyzing transcriptome data from 66 Blattodea species, we focus on the ratio of non-synonymous to synonymous mutations dN/dS as a marker of natural selection efficiency and effective population size. Our results demonstrate an elevated dN/dS ratio in termites compared to other members of Blattodea, further generalizing the idea that convergent evolution toward eusociality strongly reduces the effective population size and the genome-wide efficiency of natural selection. Then, by comparing 68 termite transcriptomes, we show that this decrease in natural selection efficiency is even more pronounced in termites displaying high levels of social complexity. This study contributes to understanding the complex interplay between social structures and natural selection patterns, highlighting the genetic footprint of eusociality in shaping the evolution of termites.

Published online:
DOI: 10.24072/pcjournal.476
Type: Research article

Roux, Camille 1; Ha, Alice 2; Weyna, Arthur 2; Lode, Morgan 1; Romiguier, Jonathan 2

1 Univ. Lille, CNRS, UMR 8198 - Evo-Eco-Paleo, F-59000, Lille, France
2 Institut des Sciences de l’Evolution (UMR 5554) University of Montpellier, CNRS, F-34000 Montpellier, France
License: CC-BY 4.0
Copyrights: The authors retain unrestricted copyrights and publishing rights
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Roux, Camille; Ha, Alice; Weyna, Arthur; Lode, Morgan; Romiguier, Jonathan. The impact of social complexity on the efficacy of natural selection in termites. Peer Community Journal, Volume 4 (2024), article  no. e101. doi : 10.24072/pcjournal.476. https://peercommunityjournal.org/articles/10.24072/pcjournal.476/

PCI peer reviews and recommendation, and links to data, scripts, code and supplementary information: 10.24072/pci.evolbiol.100794

Conflict of interest of the recommender and peer reviewers:
The recommender in charge of the evaluation of the article and the reviewers declared that they have no conflict of interest (as defined in the code of conduct of PCI) with the authors or with the content of the article.

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