Social chromosome variants differentially affect queen determination and the survival of workers in the fire ant Solenopsis invicta.

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Etat: Serval
Version: de l'auteur
ID Serval
serval:BIB_017733038012
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Social chromosome variants differentially affect queen determination and the survival of workers in the fire ant Solenopsis invicta.
Périodique
Molecular Ecology
Auteur(s)
Buechel S.D., Wurm Y., Keller L.
ISSN
1365-294X (Electronic)
ISSN-L
0962-1083
Statut éditorial
Publié
Date de publication
2014
Peer-reviewed
Oui
Volume
23
Numéro
20
Pages
5117-5127
Langue
anglais
Résumé
Intraspecific variation in social organization is common, yet the underlying causes are rarely known. An exception is the fire ant Solenopsis invicta in which the existence of two distinct forms of social colony organization is under the control of the two variants of a pair of social chromosomes, SB and Sb. Colonies containing exclusively SB/SB workers accept only one single queen and she must be SB/SB. By contrast, when colonies contain more than 10% of SB/Sb workers, they accept several queens but only SB/Sb queens. The variants of the social chromosome are associated with several additional important phenotypic differences, including the size, fecundity and dispersal strategies of queens, aggressiveness of workers, and sperm count in males. However, little is known about whether social chromosome variants affect fitness in other life stages. Here, we perform experiments to determine whether differential selection occurs during development and in adult workers. We find evidence that the Sb variant of the social chromosome increases the likelihood of female brood to develop into queens and that adult SB/Sb workers, the workers that cull SB/SB queens, are overrepresented in comparison to SB/SB workers. This demonstrates that supergenes such as the social chromosome can have complex effects on phenotypes at various stages of development.
Mots-clé
fire ants, Gp-9, ontogenetic selection, social chromosome, social evolution, Solenopsis invicta
Pubmed
Web of science
Open Access
Oui
Création de la notice
15/09/2014 18:30
Dernière modification de la notice
08/05/2019 13:41
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