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Population differentiation as a test for selective sweeps

Open access
Chen, Hua, Patterson, Nick, Reich, David·2010·Genome Research

Abstract

Selective sweeps can increase genetic differentiation among populations and cause allele frequency spectra to depart from the expectation under neutrality. We present a likelihood method for detecting selective sweeps that involves jointly modeling the multilocus allele frequency differentiation between two populations. We use Brownian motion to model genetic drift under neutrality, and a deterministic model to approximate the effect of a selective sweep on single nucleotide polymorphisms (SNPs) in the vicinity. We test the method with extensive simulated data, and demonstrate that in some scenarios the method provides higher power than previously reported approaches to detect selective sweeps, and can provide surprisingly good localization of the position of a selected allele. A strength of our technique is that it uses allele frequency differentiation between populations, which is much more robust to ascertainment bias in SNP discovery than methods based on the allele frequency spectrum. We apply this method to compare continentally diverse populations, as well as Northern and Southern Europeans. Our analysis identifies a list of loci as candidate targets of selection, including well-known selected loci and new regions that have not been highlighted by previous scans for selection.

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Metadata

Authors
Chen, H., Patterson, N., & Reich, D.
Venue
Genome Research
Published
2010-01-19
Volume
20
Issue
3
Pages
393-402
ISSN
1088-9051 (ISSN-L)
OpenAlex
W2050340111
Cited by
888
References
39
Type
posted content
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Population differentiation as a test for selective sweeps. https://app.cochat.ai/papers/10.1101/gr.100545.109
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Chen, H., Patterson, N., & Reich, D. (2010). Population differentiation as a test for selective sweeps. Genome Research. https://doi.org/10.1101/gr.100545.109

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