Phase transitions in sexual populations subject to stabilizing selection.
We show that a simple model of an evolving sexual population, which dates back to some of the earliest work in theoretical population genetics, exhibits an unexpected and previously unobserved phase transition between ordered and disordered states. This behavior is not present in populations evolving asexually without recombination and is thus important in any comparison of sexual and asexual populations. In order to calculate the details of the phase transition, we use techniques from statistical physics. We introduce the correlation of the population as the order parameter of the system and use maximum entropy inference to find the state of the population at any time.
Department of Computer Science, University of Exeter, Exeter EX4 4QF, United Kingdom. A.C.Rogers@exeter.ac.uk
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Rogers
D005075:Biological Evolution; D005828:Genetics, Population; D008957:Models, Genetic; D009154:Mutation; D012737:Sex Factors