Wolbachia superinfections and the expression of cytoplasmic incompatibility

Proceedings. Biological Sciences
Steven P SinkinsS L O'Neill

Abstract

Strains of Drosophila simulans from Riverside, California (DSR) and Hawaii (DSH) harbour distinct strains of the cytoplasmic incompatibility microorganism Wolbachia, resulting in the expression of bidirectional incompatibility when crossed. D. simulans lines carrying both of these (superinfected) Wolbachia strains were generated by the transfer of infected DSH cytoplasm into DSR embryos by microinjection. The superinfected flies were unidirectionally incompatible with both DSR and DSH individuals. As a result of this pattern, the superinfected state was observed to replace single infections in laboratory populations. The ability of the superinfection to spread was modulated by the production of singly infected offspring from superinfected mothers: strain segregation was observed under crowded larval rearing conditions. An inverse correlation between the penetrance of the cytoplasmic incompatibility phenotype and the degree of larval crowding was also observed. The findings have implications for the evolution of bidirectionally incompatible strains, and lead to the prediction that superinfections should be relatively common in field populations. Evidence for a natural superinfection in the mosquito Aedes albopictus is discussed....Continue Reading

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Citations

Apr 1, 1996·Trends in Ecology & Evolution·D J Clancy, A A Hoffmann
Jun 10, 2005·Insect Biochemistry and Molecular Biology·Zhiyong XiStephen L Dobson
Apr 10, 1999·Insect Biochemistry and Molecular Biology·S L DobsonS L O'Neill
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Mar 20, 2003·Trends in Parasitology·Stephen L Dobson
Nov 30, 2011·Proceedings of the National Academy of Sciences of the United States of America·Marcus S C BlagroveSteven P Sinkins
Oct 7, 2008·The Journal of Heredity·Thomas WalkerSteven P Sinkins
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Jun 25, 2002·Proceedings. Biological Sciences·Claire BerticatMylène Weill
Nov 13, 2002·Proceedings. Biological Sciences·D DeWayne ShoemakerEdward Allen Herre
Jun 17, 2006·Proceedings. Biological Sciences·Zhiyong XiStephen L Dobson
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Oct 13, 2009·Applied and Environmental Microbiology·Eunho SuhStephen L Dobson
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Jan 1, 1997·Annual Review of Entomology·J H Werren
Jan 10, 2013·PLoS Neglected Tropical Diseases·Laurence MoussonAnna-Bella Failloux
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Apr 24, 2008·Genetics·Sofia ZabalouKostas Bourtzis

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