Current address: School of Animal Biology, University of Western Australia, Perth, WA 6009, Australia.
THE EFFECT OF VARIABLE FREQUENCY OF SEXUAL REPRODUCTION ON THE GENETIC STRUCTURE OF NATURAL POPULATIONS OF A CYCLICAL PARTHENOGEN
Article first published online: 6 NOV 2011
© 2011 The Author(s). Evolution© 2011 The Society for the Study of Evolution.
Volume 66, Issue 3, pages 919–926, March 2012
How to Cite
Allen, D. E. and Lynch, M. (2012), THE EFFECT OF VARIABLE FREQUENCY OF SEXUAL REPRODUCTION ON THE GENETIC STRUCTURE OF NATURAL POPULATIONS OF A CYCLICAL PARTHENOGEN. Evolution, 66: 919–926. doi: 10.1111/j.1558-5646.2011.01488.x
- Issue published online: 1 MAR 2012
- Article first published online: 6 NOV 2011
- Accepted manuscript online: 13 OCT 2011 06:26AM EST
- Received September 13, 2011, Accepted September 20, 2011, Data Archived: Dryad doi:10.5061/dryad.2m3k7v74
- cyclical parthenogen;
Cyclical parthenogens are a valuable system in which to empirically test theoretical predictions as to the genetic consequences of sexual reproduction in natural populations, particularly if the frequency of sexual relative to asexual reproduction can be quantified. In this study, we used a series of lake populations of the cyclical parthenogen, Daphnia pulicaria, that vary consistently in their investment in sexual reproduction, to address the questions of whether the ecological variation in investment in sex is detectable at the genetic level, and if so, whether the genetic patterns seen are consistent with theoretical predictions. We show that there is variation in the genetic structure of these populations in a manner consistent with their investment in sexual reproduction. Populations engaging in a high frequency of sex were in Hardy–Weinberg and gametic phase equilibrium, and showed little genotypic differentiation across sampled years. In contrast, populations with a lower frequency of sex deviated widely from equilibrium, had reduced multilocus clonal diversity, and showed significant temporal genotypic deviation.