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Multiple paternity or multiple queens: two routes to greater intracolonial genetic diversity in the eusocial Hymenoptera
Article first published online: 14 APR 2008
DOI: 10.1111/j.1420-9101.2008.01532.x
© 2008 The Authors. Journal Compilation © 2008 European Society For Evolutionary Biology
Additional Information
How to Cite
HUGHES, W. O. H., RATNIEKS, F. L. W. and OLDROYD, B. P. (2008), Multiple paternity or multiple queens: two routes to greater intracolonial genetic diversity in the eusocial Hymenoptera. Journal of Evolutionary Biology, 21: 1090–1095. doi: 10.1111/j.1420-9101.2008.01532.x
Publication History
- Issue published online: 14 APR 2008
- Article first published online: 14 APR 2008
- Received 8 January 2008; revised 2 March 2008; accepted 4 March 2008
Keywords:
- comparative analysis;
- polyandry;
- polygyny;
- relatedness;
- social insect
Abstract
Understanding the evolution of multiple mating by females (polyandry) is an important question in behavioural ecology. Most leading explanations for polyandry by social insect queens are based upon a postulated fitness benefit from increased intracolonial genetic diversity, which also arises when colonies are headed by multiple queens (polygyny). An indirect test of the genetic diversity hypotheses is therefore provided by the relationship between polyandry and polygyny across species, which should be negative if the genetic diversity hypotheses are correct. Here, we conduct a powerful comparative investigation of the relationship between polyandry and polygyny for 241 species of eusocial Hymenoptera (ants, bees and wasps). We find a clear and significant negative relationship between polyandry and polygyny after controlling for phylogeny. These results strongly suggest that fitness benefits resulting from increased intracolonial genetic diversity have played an important role in the evolution of polyandry, and possibly polygyny, in social insects.