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An eco-evolutionary approach of adaptation and recombination in a large population of varying size

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  • Smadi, Charline

Abstract

We identify the genetic signature of a selective sweep in a population described by a birth-and-death process with density dependent competition. We study the limit behavior for large K, where K scales the population size. We focus on two loci: one under selection and one neutral. We distinguish a soft sweep occurring after an environmental change, from a hard sweep occurring after a mutation, and express the neutral proportion variation as a function of the ecological parameters, recombination probability rK, and K. We show that for a hard sweep, two recombination regimes appear according to the order of rKlogK.

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  • Smadi, Charline, 2015. "An eco-evolutionary approach of adaptation and recombination in a large population of varying size," Stochastic Processes and their Applications, Elsevier, vol. 125(5), pages 2054-2095.
    • Handle: RePEc:eee:spapps:v:125:y:2015:i:5:p:2054-2095
    DOI: 10.1016/j.spa.2014.12.007
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    References listed on IDEAS

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    1. Pleuni S Pennings & Joachim Hermisson, 2006. "Soft Sweeps III: The Signature of Positive Selection from Recurrent Mutation," PLOS Genetics, Public Library of Science, vol. 2(12), pages 1-15, December.
    2. Champagnat, Nicolas, 2006. "A microscopic interpretation for adaptive dynamics trait substitution sequence models," Stochastic Processes and their Applications, Elsevier, vol. 116(8), pages 1127-1160, August.
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    1. Billiard, Sylvain & Smadi, Charline, 2017. "The interplay of two mutations in a population of varying size: A stochastic eco-evolutionary model for clonal interference," Stochastic Processes and their Applications, Elsevier, vol. 127(3), pages 701-748.

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