Complex hybrid origin of genetic caste determination in harvester ants

Détails

Cette publication est une ancienne version. Cette notice est remplacée par serval:BIB_7B573242CC53
Ressource 1 Sous embargo indéterminé.
Accès restreint UNIL
Etat: Public
Version: de l'auteur⸱e
Licence: Non spécifiée
ID Serval
serval:BIB_5832BE9BE9E6
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Complex hybrid origin of genetic caste determination in harvester ants
Périodique
Nature
Auteur⸱e⸱s
Helms Cahan S., Keller L.
ISSN
1476-4687
Statut éditorial
Publié
Date de publication
07/2003
Peer-reviewed
Oui
Volume
424
Numéro
6946
Pages
306-9
Langue
anglais
Notes
Journal Article Research Support, Non-U.S. Gov't --- Old month value: Jul 17
Résumé
Caste differentiation and division of labour are the hallmarks of insect societies and at the root of their ecological success. Kin selection predicts that caste determination should result from environmentally induced differences in gene expression, a prediction largely supported by empirical data. However, two exceptional cases of genetically determined caste differentiation have recently been found in harvester ants. Here we show that genetic caste determination evolved in these populations after complex hybridization events. We identified four distinct genetic lineages, each consisting of unique blends of the genomes of the parental species, presumably Pogonomyrmex barbatus and P. rugosus. Crosses between lineages H1 and H2 and between J1 and J2 give rise to workers, whereas queens develop from within-lineage matings. Although historical gene flow is evident, genetic exchange among lineages and between lineages and the parental species no longer occurs. This unusual system of caste determination seems to be evolutionarily stable.
Mots-clé
Animals Ants/classification/*genetics/*physiology Crosses, Genetic Female Gene Frequency Genome Genotype Male Models, Genetic Phylogeny *Social Dominance Species Specificity
Pubmed
Web of science
Création de la notice
24/01/2008 18:39
Dernière modification de la notice
30/10/2023 8:59
Données d'usage