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Originally published as Genetics Published Articles Ahead of Print on January 21, 2007.
Genetics, Vol. 175, 1735-1740, April 2007, Copyright © 2007
doi:10.1534/genetics.106.070045
Kin Recognition in Aleochara bilineata Could Support the Kinship Theory of Genomic Imprinting
Anne Lizé*,1,
Anne Marie Cortesero*,
Anne Atlan
and
Denis Poinsot*
* EA 3193, Equipe d'Ecobiologie des Insectes Parasitoïdes, Université de Rennes 1, Rennes 35042, France and UMR 6553, Ecosystèmes, Biodiversité et Evolution, Université de Rennes 1, Rennes 35042, France
1 Corresponding author: EA 3193 Ecobiologie des Insectes Parasitoïdes, Université de Rennes 1, Campus de Beaulieu, 263 Av. du Général Leclerc, Rennes 35042, France.
E-mail: anne.lize{at}univ-rennes1.fr
Genomic imprinting corresponds to the differential expression of a gene according to its paternal or maternal origin. The kinship theory of genomic imprinting proposes that maternally or paternally inherited genes may be in conflict over their effects on kin differently related along the paternal or maternal line. Most examples supporting the kinship theory of imprinting deal with competition between offspring for maternal resources. However, genomic imprinting may also explain differential behavioral expression toward kin whenever sibs are more related to each other via one parental sex than the other. Unfortunately, nothing is currently known about imprinting associated with a behavioral phenotype in insects. Here we report the first evidence of such a maternally imprinted behavior. We show that the solitary parasitoid larvae of Aleochara bilineata Gyll (Coleoptera; Staphylinidae), which avoid superparasitizing their full sibs, also avoid their cousins when they are related to them through their father, but not when they are related to them through their mother. A genetic kin recognition mechanism is proposed to explain this result and we conclude that genomic imprinting could control the avoidance of kin superparasitism in this species and have a profound influence on decision-making processes.
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