Journal article

Frequency-Dependent and Correlational Selection Pressures Have Conflicting Consequences for Assortative Mating in a Color-Polymorphic Lizard, Uta stansburiana

Lesley T Lancaster, Andrew G McAdam, Christy A Hipsley, Barry R Sinervo



Genetically determined polymorphisms incorporating multiple traits can persist in nature under chronic, fluctuating, and sometimes conflicting selection pressures. Balancing selection among morphs preserves equilibrium frequencies, while correlational selection maintains favorable trait combinations within each morph. Under negative frequency-dependent selection, females should mate (often disassortatively) with rare male morphotypes to produce conditionally fit offspring. Conversely, under correlational selection, females should mate assortatively to preserve coadapted gene complexes and avoid ontogenetic conflict. Using controlled breeding designs, we evaluated consequences of assortative ..

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University of Melbourne Researchers


Awarded by National Science Foundation

Funding Acknowledgements

We would like to thank the numerous undergraduate researchers involved with this project for their invaluable assistance in lizard rearing and data collection. We also thank D. Haisten, A. Runemark, Y. Takahashi, and M. Verzijden for insightful comments on the manuscript. This project was funded by National Science Foundation DE-BOS-15973 to A.G.M. and B.R.S.