Baseline and stress-induced corticosterone levels are heritable and genetically correlated in a barn owl population.

Détails

ID Serval
serval:BIB_2DD42E77D69B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Baseline and stress-induced corticosterone levels are heritable and genetically correlated in a barn owl population.
Périodique
Heredity
Auteur⸱e⸱s
Béziers P., San-Jose L.M., Almasi B., Jenni L., Roulin A.
ISSN
1365-2540 (Electronic)
ISSN-L
0018-067X
Statut éditorial
Publié
Date de publication
09/2019
Peer-reviewed
Oui
Volume
123
Numéro
3
Pages
337-348
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
The hypothalamic-pituitary-adrenal (HPA) axis is responsible for the regulation of corticosterone, a hormone that is essential in the mediation of energy allocation and physiological stress. As a continuous source of challenge and stress for organisms, the environment has promoted the evolution of physiological adaptations and led to a great variation in corticosterone profiles within or among individuals, populations and species. In order to evolve via natural selection, corticosterone levels do not only depend on the strength of selection exerted on them, but also on the extent to which the regulation of corticosterone is heritable. Nevertheless, the heritability of corticosterone profiles in wild populations is still poorly understood. In this study, we estimated the heritability of baseline and stress-induced corticosterone levels in barn owl (Tyto alba) nestlings from 8 years of data, using a multivariate animal model based on a behavioural pedigree. We found that baseline and stress-induced corticosterone levels are strongly genetically correlated (r = 0.68-0.80) and that the heritability of stress-induced corticosterone levels (h <sup>2</sup> = 0.24-0.33) was moderate and similar to the heritability of baseline corticosterone levels (h <sup>2</sup> = 0.19-0.30). These findings suggest that the regulation of stress-induced corticosterone and baseline levels evolves at a similar pace when selection acts with the same intensity on both traits and that contrary to previous studies, the evolution of baseline and stress-induced level is interdependent in barn owls, as they may be strongly genetically correlated.
Mots-clé
Adaptation, Physiological/genetics, Animals, Behavior, Animal/physiology, Biological Evolution, Corticosterone/blood, Corticosterone/genetics, Female, Inheritance Patterns, Male, Models, Genetic, Phenotype, Quantitative Trait, Heritable, Selection, Genetic, Stress, Physiological/genetics, Strigiformes/blood, Strigiformes/genetics, Switzerland
Pubmed
Web of science
Financement(s)
Fonds national suisse / 3100A0-104134
Fonds national suisse / 31003A-127057
Fonds national suisse / 31003A-120517
Création de la notice
23/08/2019 13:15
Dernière modification de la notice
26/06/2020 5:21
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