Experimental conversion of colony social organization in fire ants (Solenopsis invicta): worker genotype manipulation in absence of queen effects

Détails

ID Serval
serval:BIB_8792E9866403
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Experimental conversion of colony social organization in fire ants (Solenopsis invicta): worker genotype manipulation in absence of queen effects
Périodique
Journal of Insect Behavior
Auteur(s)
Gotzek D., Ross K. G.
ISSN
0892-7553
Statut éditorial
Publié
Date de publication
2008
Peer-reviewed
Oui
Volume
21
Numéro
5
Pages
337-350
Langue
anglais
Résumé
Colony social organization in the fire ant Solenopsis invicta appears to be under strong genetic control. In the invasive USA range, polygyny (multiple queens per colony) is marked by the presence of the Gp-9(b) allele in most of a colony's workers, whereas monogyny (single queen per colony) is associated with the exclusive occurrence of the Gp-9(B) allele. Ross and Keller, Behav Ecol Sociobiol 51:287-295 (2002) experimentally manipulated social organization by cross-fostering queens into colonies of the alternate form, thereby changing adult worker Gp-9 genotype frequencies over time. Although these authors showed that social behavior switched predictably when the frequency of b-bearing adult workers crossed a threshold of 5-10%, the possibility that queen effects caused the conversions could not be excluded entirely. We addressed this problem by fostering polygyne brood into queenright monogyne colonies. All such treatment colonies switched social organization to become polygyne, coincident with their proportions of b-bearing workers exceeding 12%. Our results support the conclusion that polygyny in S. invicta is induced by a minimum frequency of colony workers carrying the b allele, and further confirm that its expression is independent of queen genotype or history, worker genotypes at genes not linked to Gp-9, and colony genetic diversity.
Mots-clé
fire ants, Gp-9, monogyny, polygyny, social organization, Solenopsis invicta
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Création de la notice
23/04/2009 16:45
Dernière modification de la notice
03/03/2018 19:02
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