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Life-history traits display strong associations to genome size in annelids


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Beaudreau, Nicholas, Massamba-N'Siala, Gloria, Belzile, Claude, Calosi, Piero ORCID logoORCID: et Dufresne, France (2021). Life-history traits display strong associations to genome size in annelids. Hydrobiologia, 848 (4). pp. 799-810.

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Genome size, known also as the C-value, has been proposed as an important determinant of life-history variation in numerous animal taxa. We assessed the relationships between genome size and fitness-related life-history traits in six species of interstitial marine annelids of the genus Ophryotrocha. Life-history traits and genome size data obtained from 18 additional annelid species were included in our analyses to have a broader phylogenetic scope. Unexpectedly, genome sizes assessed here by flow cytometry in four Ophryotrocha species were three times larger than previously reported values obtained using Feulgen densitometry. This has implications for the hypothesis that harsh interstitial habitats select for small genomes in meiofaunal annelids. Within the genus Ophryotrocha, significant and positive relationships were found between genome size and nucleus size, and between genome size, age at first egg mass deposition, body size and lifespan. These relationships held up in the broader phylogenetic comparison. Our study provides evidence for the important role played by genome size in the evolution of life-history traits in annelids. -- Keywords : C-value ; Flow cytometry ; Ophryotrocha ; Body size ; Developmental rate ; Lifespan.

Type de document : Article
Validation par les pairs : Oui
Information complémentaire : This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: // Cette version de l'article a été acceptée pour publication, après révision par les pairs (lorsqu'applicable) et est soumise aux conditions d'utilisation AM de Springer Nature, mais ne constitue pas la version officielle et ne reflète pas les améliorations apportées après l'acceptation, ni les corrections. La version officielle de l'article est disponible en ligne à l'adresse suivante :
Version du document déposé : Post-print (version corrigée et acceptée)
Départements et unités départementales : Département de biologie, chimie et géographie
Déposé par : DIUQAR UQAR
Date de dépôt : 11 juill. 2023 19:39
Dernière modification : 02 oct. 2023 15:00

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