Task-dependent influence of genetic architecture and mating frequency on division of labour in social insect societies.

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Etat: Serval
Version: Final published version
ID Serval
serval:BIB_2CBC9395E5D2
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Task-dependent influence of genetic architecture and mating frequency on division of labour in social insect societies.
Périodique
Behavioral Ecology and Sociobiology
Auteur(s)
Tarapore D., Floreano D., Keller L.
ISSN
0340-5443
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
64
Numéro
4
Pages
675-684
Langue
anglais
Résumé
Division of labour is one of the most prominent features of social insects. The efficient allocation of individuals to different tasks requires dynamic adjustment in response to environmental perturbations. Theoretical models suggest that the colony-level flexibility in responding to external changes and internal perturbation may depend on the within-colony genetic diversity, which is affected by the number of breeding individuals. However, these models have not considered the genetic architecture underlying the propensity of workers to perform the various tasks. Here, we investigated how both within-colony genetic variability (stemming from variation in the number of matings by queens) and the number of genes influencing the stimulus (threshold) for a given task at which workers begin to perform that task jointly influence task allocation efficiency. We used a numerical agent-based model to investigate the situation where workers had to perform either a regulatory task or a foraging task. One hundred generations of artificial selection in populations consisting of 500 colonies revealed that an increased number of matings always improved colony performance, whatever the number of loci encoding the thresholds of the regulatory and foraging tasks. However, the beneficial effect of additional matings was particularly important when the genetic architecture of queens comprised one or a few genes for the foraging task's threshold. By contrast, a higher number of genes encoding the foraging task reduced colony performance with the detrimental effect being stronger when queens had mated with several males. Finally, the number of genes encoding the threshold for the regulatory task only had a minor effect on colony performance. Overall, our numerical experiments support the importance of mating frequency on efficiency of division of labour and also reveal complex interactions between the number of matings and genetic architecture.
Mots-clé
Task allocation, Response thresholds, Number of matings, Number of loci, Genetic diversity
Web of science
Création de la notice
13/11/2009 1:10
Dernière modification de la notice
03/03/2018 15:27
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