Nonadaptive explanations for signatures of partial selective sweeps in Drosophila

Molecular Biology and Evolution
J Michael MacphersonDmitri A Petrov

Abstract

A beneficial mutation that has nearly but not yet fixed in a population produces a characteristic haplotype configuration, called a partial selective sweep. Whether nonadaptive processes might generate similar haplotype configurations has not been extensively explored. Here, we consider 5 population genetic data sets taken from regions flanking high-frequency transposable elements in North American strains of Drosophila melanogaster, each of which appears to be consistent with the expectations of a partial selective sweep. We use coalescent simulations to explore whether incorporation of the species' demographic history, purifying selection against the element, or suppression of recombination caused by the element could generate putatively adaptive haplotype configurations. Whereas most of the data sets would be rejected as nonneutral under the standard neutral null model, only the data set for which there is strong external evidence in support of an adaptive transposition appears to be nonneutral under the more complex null model and in particular when demography is taken into account. High-frequency, derived mutations from a recently bottlenecked population, such as we study here, are of great interest to evolutionary genetic...Continue Reading

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Citations

Nov 27, 2008·Molecular Biology and Evolution·Josefa GonzálezDmitri A Petrov
May 22, 2009·Molecular Biology and Evolution·Josefa GonzálezDmitri A Petrov
May 7, 2010·Molecular Biology and Evolution·Punita Juneja, Brian P Lazzaro
Mar 25, 2009·Genome Research·Joseph K PickrellJonathan K Pritchard
Oct 24, 2008·PLoS Biology·Josefa GonzálezDmitri A Petrov
Jan 17, 2009·PLoS Genetics·James J CaiDmitri A Petrov
Jun 9, 2009·PLoS Genetics·Guy SellaPeter Andolfatto
Jun 27, 2009·Gene·Josefa González, Dmitri A Petrov
Dec 5, 2013·Evolution; International Journal of Organic Evolution·Ryan T HietpasDaniel N A Bolon
Dec 12, 2017·Genome Biology and Evolution·Sarah A SignorSergey Nuzhdin
Oct 30, 2016·American Journal of Botany·Georgiana May

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