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Kin recognition: Neurogenomic response to mate choice and sib mating avoidance in a parasitic wasp
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Kin recognition: Neurogenomic response to mate choice and sib mating avoidance in a parasitic wasp
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Journal Article
Kin recognition: Neurogenomic response to mate choice and sib mating avoidance in a parasitic wasp
2020
Overview
Sib mating increases homozygosity, which therefore increases the risk of inbreeding depression. Selective pressures have favoured the evolution of kin recognition and avoidance of sib mating in numerous species, including the parasitoid wasp Venturia canescens. We studied the female neurogenomic response associated with sib mating avoidance after females were exposed to courtship displays by i) unrelated males or ii) related males or iii) no courtship (controls). First, by comparing the transcriptional responses of females exposed to courtship displays to those exposed to controls, we saw a rapid and extensive transcriptional shift consistent with social environment. Second, by comparing the transcriptional responses of females exposed to courtship by related to those exposed to unrelated males, we characterized distinct and repeatable transcriptomic patterns that correlated with the relatedness of the courting male. Network analysis revealed 3 modules of specific 'sib-responsive' genes that were distinct from other 'courtship-responsive' modules. Therefore, specific neurogenomic states with characteristic brain transcriptomes associated with different behavioural responses affect sib mating avoidance behaviour.
