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Article Dans Une Revue Genome Biology Année : 2023

Pervasive tandem duplications and convergent evolution shape coral genomes

Alice Rouan
Carol Buitrago-López
Laura Capasso
  • Fonction : Auteur
Emilie Boissin
Mélanie Pousse
  • Fonction : Auteur
Corinne Cruaud
Karine Labadie
Sylvie Tambutté
  • Fonction : Auteur
Clémentine Moulin
Guillaume Bourdin
  • Fonction : Auteur
Guillaume Iwankow
  • Fonction : Auteur
Sarah Romac
  • Fonction : Auteur
Sylvain Agostini
Bernard Banaigs
Emmanuel Boss
Chris Bowler
Colomban de Vargas
J. Michel Flores
Didier Forcioli
Paola Furla
Stéphane Pesant
Stéphanie Reynaud
Matthew B Sullivan
Shinichi Sunagawa
Olivier P Thomas
Romain Troublé
  • Fonction : Auteur
Rebecca Vega Thurber
Denis Allemand
Serge Planes
Eric Gilson
Didier Zoccola
Christian R Voolstra

Résumé

Background: Over the last decade, several coral genomes have been sequenced allowing a better understanding of these symbiotic organisms threatened by climate change. Scleractinian corals are reef builders and are central to coral reef ecosystems, providing habitat to a great diversity of species. Results: In the frame of the Tara Pacific expedition, we assemble two coral genomes, Porites lobata and Pocillopora cf. effusa, with vastly improved contiguity that allows us to study the functional organization of these genomes. We annotate their gene catalog and report a relatively higher gene number than that found in other public coral genome sequences, 43,000 and 32,000 genes, respectively. This finding is explained by a high number of tandemly duplicated genes, accounting for almost a third of the predicted genes. We show that these duplicated genes originate from multiple and distinct duplication events throughout the coral lineage. They contribute to the amplification of gene families, mostly related to the immune system and disease resistance, which we suggest to be functionally linked to coral host resilience. Conclusions: At large, we show the importance of duplicated genes to inform the biology of reef-building corals and provide novel avenues to understand and screen for differences in stress resilience. † Benjamin Noel and France Denoeud have equal contribution.
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Dates et versions

hal-04117388 , version 1 (05-06-2023)

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Benjamin Noel, France Denoeud, Alice Rouan, Carol Buitrago-López, Laura Capasso, et al.. Pervasive tandem duplications and convergent evolution shape coral genomes. Genome Biology, 2023, 24 (1), pp.123. ⟨10.1186/s13059-023-02960-7⟩. ⟨hal-04117388⟩
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