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An efficient multi-locus mixed-model approach for genome-wide association studies in structured populations

Open access
Segura, Vincent, Vilhjálmsson, Bjarni J, Platt, Alexander, Korte, Arthur, Seren, Ümit, Long, Quan, Nordborg, Magnus·2012·Nature Genetics

Abstract

Population structure causes genome-wide linkage disequilibrium between unlinked loci, leading to statistical confounding in genome-wide association studies. Mixed models have been shown to handle the confounding effects of a diffuse background of large numbers of loci of small effect well, but they do not always account for loci of larger effect. Here we propose a multi-locus mixed model as a general method for mapping complex traits in structured populations. Simulations suggest that our method outperforms existing methods in terms of power as well as false discovery rate. We apply our method to human and Arabidopsis thaliana data, identifying new associations and evidence for allelic heterogeneity. We also show how a priori knowledge from an A. thaliana linkage mapping study can be integrated into our method using a Bayesian approach. Our implementation is computationally efficient, making the analysis of large data sets (n > 10,000) practicable.

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Research works printed but not linked: 26

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Metadata

Authors
Segura, V., Vilhjálmsson, B. J., Platt, A., Korte, A., Seren, Ü., Long, Q., & Nordborg, M.
Venue
Nature Genetics
Published
2012-06-17
Volume
44
Issue
7
Pages
825-830
ISSN
  • 1061-4036 (ISSN-L)
  • 1546-1718
OpenAlex
W2146374090
Cited by
1,072
References
15
FWCI
23.03
Type
journal article
Language
en
Open access
green
Licence
www.springer.com/tdm (tdm)

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Segura, V., Vilhjálmsson, B. J., Platt, A., Korte, A., Seren, Ü., Long, Q., & Nordborg, M. (2012). An efficient multi-locus mixed-model approach for genome-wide association studies in structured populations. Nature Genetics. https://doi.org/10.1038/ng.2314

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