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22 December 2016 Influence of Parthenogenesis-Inducing Wolbachia Infection and Sexual Mode on Trichogramma kaykai (Hymenoptera: Trichogrammatidae) Fitness
James E. Russell, Michael Saum, Victoria Burgess, Keval Bollavaram, Tyler Donnell
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Abstract

Wolbachia pipientis represents one of the most pervasive bacterial infections in the world, with estimates of over one million arthropods species infected. Parthenogenesis-inducing (PI) Wolbachia in various haplodiploid species effectively feminizes male offspring through a process called gamete duplication and converts the reproductive mode of infected females from arrhenotoky (fertilized eggs undergo female development, unfertilized eggs undergo male development) to thelytoky (fertilized and unfertilized eggs undergo female development). The fitness consequences associated with PI Wolbachia infection are of particular interest to ecologists and evolutionary biologists given the extreme effect that infection has on the reproductive mode of infected individuals. We use a model PI Wolbachia infected species, Trichogramma kaykai Pinto (Hymenoptera: Trichogrammatidae), to investigate the effects of infection status and mating status on T. kaykai fitness. Three genotypically distinct isofemale cultures were used to test whether fitness (number of offspring reaching pupal stage, number of female offspring, and pupal survival) differed among infected unmated, infected mated, and antibiotically curedmated females. Significant survival costs were observed for mated Wolbachia-infected females, and fecundity costs were observed for mated and unmatedWolbachia-infected females, with significant variation for these costs across host genotypes.

© The Authors 2016. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com
James E. Russell, Michael Saum, Victoria Burgess, Keval Bollavaram, and Tyler Donnell "Influence of Parthenogenesis-Inducing Wolbachia Infection and Sexual Mode on Trichogramma kaykai (Hymenoptera: Trichogrammatidae) Fitness," Annals of the Entomological Society of America 110(3), 263-268, (22 December 2016). https://doi.org/10.1093/aesa/saw093
Received: 30 July 2016; Accepted: 13 November 2016; Published: 22 December 2016
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KEYWORDS
fitness
Trichogramma kaykai
Wolbachia
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