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Kin recognition: neurogenomic response to sib mating avoidance in a parasitic wasp

ABSTRACT: Kin recognition: neurogenomic response to sib mating avoidance in a parasitic wasp

PROVIDER: PRJNA510817 | ENA |

REPOSITORIES: ENA

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Kin recognition: neurogenomic response to sib mating avoidance in a parasitic wasp

Project description:Sib mating increase homozygosity and can lead to inbreeding depression. Selective pressures have favored the evolution of kin recognition and sib avoidance in mate choice. Such avoidance behavior has been recorded in the parasitoid wasp Venturia canescens where the sex determining system (single-locus complementary sex determination, sl-csd) introduces an extra short-term cost to inbreeding; females preferentially mate with unrelated males. The genetics underlying mate choice of females and kin recognition remains largely unexplored. Here we analyzed the head transcriptomic changes after exposure to distinct stimulus: courtship by unrelated male or courtship by brother, while transcriptome of females alone was used as control. Our results demonstrate that male courtship provokes a major transcriptome reprogramming in females heads. The transcriptomic response is highly dependent on the compatibility of the courting male. We subdivided the socially responsive genes using an integrative gene network analysis, we highlighted genes regulated by courtship, whatever the relatedness of the courting male. We also showed that the regulation of some peculiar group of genes is very specific of compatible male courtship, while others are regulated only by incompatible male courtship. We suggest that those different transcriptomic responses lead to mating decision or sib mating avoidance behavior observed in this species.

2018-12-20 | GSE124129 | GEO

Kin recognition: Neurogenomic response to mate choice and sib mating avoidance in a parasitic wasp.

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Project description:Upon pathogenic infection, drosophila larval host mounts an immune response. Parasitic wasps inject venom that contain virulence factors during oviposition, which can elicit host immune response, and in some cases, suppress host immune responses altogether. Several microarray experiments have been performed on different classes of parasitic wasps. We wanted to compare how Ganaspis xanthopoda-infected hosts respond compared to other classes of parasitic wasps. Third instar y w larvae from a 2-day egglay were infected with G. xanthopoda for three and six hours, respectively, by introducing waps in petri-dish containing larvae. Controls were handled side-by-side without introducing wasps. Host larvae were immediately dissected, infection confirmed by presence of wasp egg, and frozen in liquid nitrogen and ground in Trizol. RNA was isolated and checked by agarose gel-electrophoresis. Samples were then sent to the Microarray Core Facility at Weill Cornell Medical College.

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