Abstract
DNA methylation plays an important role in the epigenetic control of developmental and behavioral plasticity, with connections to the generation of striking phenotypic differences between castes (larger, reproductive queens and smaller, non-reproductive workers) in honeybees and ants. Here, we provide the first comparative investigation of caste- and life stage-associated DNA methylation in several species of bees and vespid wasps displaying different levels of social organization. Our results reveal moderate levels of DNA methylation in most bees and wasps, with no clear relationship to the level of sociality. Strikingly, primitively social Polistes dominula paper wasps show unusually high overall DNA methylation and caste-related differences in site-specific methylation. These results suggest DNA methylation may play a role in the regulation of behavioral and physiological differences in primitively social species with more flexible caste differences.
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Acknowledgments
We would like to thank Shelby Fleischer and Ermita Hernandez for the bumble bees, Tom Glenn for the honeybees, Sarah Kocher, Bernardo Niño, and Elina Lastro Niño for D. maculata, John Wenzel for the helpful discussions, Naila Canevazzi for the DNA extractions, Daniel Kronforst for the AFLP methods, Ali Berens for the statistical analysis, and members of the Toth laboratory for reviewing the manuscript. This research was supported by the United States Department of Agriculture Award 2008-35302-06024 to ALT and National Science Foundation Award IOS-1051808 to ALT.
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Communicated by: Sven Thatje
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Weiner, S.A., Galbraith, D.A., Adams, D.C. et al. A survey of DNA methylation across social insect species, life stages, and castes reveals abundant and caste-associated methylation in a primitively social wasp. Naturwissenschaften 100, 795–799 (2013). https://doi.org/10.1007/s00114-013-1064-z
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DOI: https://doi.org/10.1007/s00114-013-1064-z