Persistence of a Wolbachia infection frequency cline in Drosophila melanogaster and the possible role of reproductive dormancy
Peter Kriesner, William R Conner, Andrew R Weeks, Michael Turelli, Ary A Hoffmann
EVOLUTION | WILEY | Published : 2016
Field populations of arthropods are often polymorphic for Wolbachia but the factors maintaining intermediate Wolbachia frequencies are generally not understood. In Drosophila melanogaster, Wolbachia frequencies are highly variable across the globe. We document the persistence of a Wolbachia infection frequency cline in D. melanogaster populations from eastern Australia across at least 20 years, with frequencies generally high in the tropics but lower in cool temperate regions. The results are interpreted using a model of frequency dynamics incorporating cytoplasmic incompatibility (CI), imperfect maternal transmission and Wolbachia effects on fitness. Clinal variation is less pronounced in e..View full abstract
Awarded by National Institutes of Health
Awarded by NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES
This research was made possible with funding from a National Institutes of Health grant R01 GM104325 (to MT and AAH) and an ARC Laureate Fellowship (to AAH) and National Health and Medical Research Council (NHMRC) grant (to AAH). We thank M. Schiffer, V. Kellerman, D. Obbard, A. Fournier-Level, J. Brownlie, and the laboratory of C. Langley for help with field collections of D. melanogaster, and P. Ginsberg for analyzing the Panama City sample. The authors have no conflict of interest to declare.