Rapid spread of a Wolbachia infection that does not affect host reproduction in Drosophila simulans cage populations

Evolution; International Journal of Organic Evolution
Peter Kriesner, A A Hoffmann

Abstract

Wolbachia endosymbionts that are maternally inherited can spread rapidly in host populations through inducing sterility in uninfected females, but some Wolbachia infections do not influence host reproduction yet still persist. These infections are particularly interesting because they likely represent mutualistic endosymbionts, spreading by increasing host fitness. Here we document such a spread in the wAu infection of Drosophila simulans. By establishing multiple replicate cage populations, we show that wAu consistently increased from an intermediate frequency to near fixation, representing an estimated fitness advantage of around 20% for infected females. The effective population size in the cages was estimated from SNP markers to be around a few thousand individuals, precluding large effects of genetic drift in the populations. The exact reasons for the fitness advantage are unclear but viral protection and nutritional benefits are two possibilities. This article is protected by copyright. All rights reserved.

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Citations

Apr 20, 2019·Evolution; International Journal of Organic Evolution·Megan K MeanyBrandon S Cooper
Oct 30, 2019·Journal of Bacteriology·Irene L G Newton, Danny W Rice
Mar 11, 2020·PLoS Neglected Tropical Diseases·Maria Vittoria ManciniSteven P Sinkins
Apr 8, 2020·The Journal of Experimental Biology·Rohini Singh, Timothy A Linksvayer
Jun 4, 2020·Ecology and Evolution·Flore ZéléSara Magalhães
Aug 17, 2020·Molecular Biology and Evolution·Julien MartinezFrancis M Jiggins
Oct 14, 2020·PLoS Pathogens·Heverton Leandro Carneiro DutraHoracio Frydman
Oct 8, 2020·MBio·Michael T J HagueBrandon S Cooper
May 6, 2021·Biology Letters·Michael T J HagueBrandon S Cooper

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