Limited associations between MHC diversity and reproductive success in a bird species with biparental care.

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Etat: Public
Version: Final published version
Licence: CC BY 4.0
ID Serval
serval:BIB_97998F3A351A
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Limited associations between MHC diversity and reproductive success in a bird species with biparental care.
Périodique
Ecology and evolution
Auteur⸱e⸱s
Ferreira D., San-Jose L.M., Roulin A., Gaigher A., Fumagalli L.
ISSN
2045-7758 (Print)
ISSN-L
2045-7758
Statut éditorial
Publié
Date de publication
02/2024
Peer-reviewed
Oui
Volume
14
Numéro
2
Pages
e10950
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: epublish
Résumé
The selective pressure from pathogens on individuals can have direct consequences on reproduction. Genes from the major histocompatibility complex (MHC) are central to the vertebrate adaptive immune system and pathogen resistance. In species with biparental care, each sex has distinct reproductive roles and levels of investment, and due to a trade-off with immunity, one can expect different selective regimes acting upon the MHC of each parent. Here, we addressed whether couples combine each other's variation at MHC loci to increase their breeding success. Specifically, we used a 23-year dataset from a barn owl population (Tyto alba) to understand how MHC class Iα and IIβ functional divergence and supertypes of each parent were associated with clutch size and fledging success. We did not detect associations between MHC diversity and supertypes with the clutch size or with the fledging success. In addition, to understand the relative contribution from the MHC of the genetic parents and the social parents, we analyzed the fledging success using only a cross-fostered dataset. We found several associations of weak-to-moderate effect sizes between the father's MHC and fledging success: (i) lower MHC-Iα divergence in the genetic father increases fledging success, which might improve paternal care during incubation, and (ii) one and two MHC-IIβ DAB2 supertypes in the social father decrease and increase, respectively, fledging success, which may affect the paternal care after hatching. Furthermore, fledging success increased when both parents did not carry MHC-IIβ DAB1 supertype 2, which could suggest conditional effects of this supertype. Although our study relied on a substantial dataset, we showed that the associations between MHC diversity and reproductive success remain scarce and of complex interpretation in the barn owl. Moreover, our results highlighted the need to incorporate more than one proxy of reproductive success and several MHC classes to capture more complex associations.
Mots-clé
birds, functional divergence, major histocompatibility complex, reproductive success, supertype
Pubmed
Web of science
Open Access
Oui
Création de la notice
09/01/2024 10:54
Dernière modification de la notice
04/04/2024 6:11
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