No evidence for an intragenomic arms race under paternal genome elimination in Planococcus mealybugs.

Détails

ID Serval
serval:BIB_8559A37CA291
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
No evidence for an intragenomic arms race under paternal genome elimination in Planococcus mealybugs.
Périodique
Journal of evolutionary biology
Auteur(s)
de la Filia A.G., Fenn-Moltu G., Ross L.
ISSN
1420-9101 (Electronic)
ISSN-L
1010-061X
Statut éditorial
Publié
Date de publication
18/02/2019
Peer-reviewed
Oui
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: aheadofprint
Résumé
Genomic conflicts arising during reproduction might play an important role in shaping the striking diversity of reproductive strategies across life. Among these is paternal genome elimination (PGE), a form of haplodiploidy which has independently evolved several times in arthropods. PGE males are diploid but transmit maternally inherited chromosomes only, whereas paternal homologues are excluded from sperm. Mothers thereby effectively monopolize the parentage of sons, at the cost of the father's reproductive success. This creates striking conflict between the sexes that could result in a co-evolutionary arms race between paternal and maternal genomes over gene transmission, yet empirical evidence that such an arms race indeed takes place under PGE is scarce. This study addresses this by testing whether PGE is complete when paternal genotypes are exposed to divergent maternal backgrounds in intraspecific and hybrid crosses of the citrus mealybug, Planococcus citri, and the closely related Planococcus ficus. We determined whether males can transmit genetic information through their sons by tracking inheritance of two traits in a three-generation pedigree: microsatellite markers and sex-specific pheromone preferences. Our results suggest leakages of single paternal chromosomes through males occurring at a low frequency, but we find no evidence for transmission of paternal pheromone preferences from fathers to sons. The absence of differences between hybrid and intraspecific crosses in leakage rate of paternal alleles suggests that a co-evolutionary arms race cannot be demonstrated on this evolutionary timescale, but we conclude that there is scope for intragenomic conflict between parental genomes in mealybugs. Finally, we discuss how these paternal escapes can occur and what these findings may reveal about the evolutionary dynamics of this bizarre genetic system.
Mots-clé
intragenomic conflict, mealybugs, meiotic drive, paternal genome elimination
Pubmed
Création de la notice
08/03/2019 9:20
Dernière modification de la notice
21/08/2019 6:34
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