MHC diversity and female age underpin reproductive success in an Australian icon; the Tasmanian Devil - Université de Montpellier Accéder directement au contenu
Article Dans Une Revue Scientific Reports Année : 2018

MHC diversity and female age underpin reproductive success in an Australian icon; the Tasmanian Devil

Résumé

Devil Facial Tumour Disease (DFTD), a highly contagious cancer, has decimated Tasmanian devil (Sarcophilus harrisii) numbers in the wild. To ensure its long-term survival, a captive breeding program was implemented but has not been as successful as envisaged at its launch in 2005. We therefore investigated the reproductive success of 65 captive devil pair combinations, of which 35 produced offspring (successful pairs) whereas the remaining 30 pairs, despite being observed mating, produced no offspring (unsuccessful pairs). The devils were screened at six MHC Class I-linked microsatellite loci. Our analyses revealed that younger females had a higher probability of being successful than older females. In the successful pairs we also observed a higher difference in total number of heterozygous loci, i.e. when one devil had a high total number of heterozygous loci, its partner had low numbers. Our results therefore suggest that devil reproductive success is subject to disruptive MHC selection, which to our knowledge has never been recorded in any vertebrate. In order to enhance the success of the captive breeding program the results from the present study show the importance of using young (2-year old) females as well as subjecting the devils to MHC genotyping.
Fichier principal
Vignette du fichier
Thomas_41.pdf (1.07 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-02504096 , version 1 (10-03-2020)

Licence

Paternité

Identifiants

Citer

Tracey Russell, Simeon Lisovski, Mats Olsson, Gregory Brown, Rebecca Spindler, et al.. MHC diversity and female age underpin reproductive success in an Australian icon; the Tasmanian Devil. Scientific Reports, 2018, 8, pp.4175. ⟨10.1038/s41598-018-20934-9⟩. ⟨hal-02504096⟩
35 Consultations
80 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More