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Generalized admixture mapping for complex traits.

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Date
2013-07-08
Authors
Zhu, Bin
Ashley-Koch, Allison E
Dunson, David B
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Abstract
Admixture mapping is a popular tool to identify regions of the genome associated with traits in a recently admixed population. Existing methods have been developed primarily for identification of a single locus influencing a dichotomous trait within a case-control study design. We propose a generalized admixture mapping (GLEAM) approach, a flexible and powerful regression method for both quantitative and qualitative traits, which is able to test for association between the trait and local ancestries in multiple loci simultaneously and adjust for covariates. The new method is based on the generalized linear model and uses a quadratic normal moment prior to incorporate admixture prior information. Through simulation, we demonstrate that GLEAM achieves lower type I error rate and higher power than ANCESTRYMAP both for qualitative traits and more significantly for quantitative traits. We applied GLEAM to genome-wide SNP data from the Illumina African American panel derived from a cohort of black women participating in the Healthy Pregnancy, Healthy Baby study and identified a locus on chromosome 2 associated with the averaged maternal mean arterial pressure during 24 to 28 weeks of pregnancy.
Type
Journal article
Subject
generalized linear model
local ancestry
mapping by admixture linkage disequilibrium
quadratic normal moment prior
quantitative traits
African Americans
Case-Control Studies
Chromosome Mapping
Female
Genetic Association Studies
Genetics, Population
Genome, Human
Humans
Linkage Disequilibrium
Models, Theoretical
Pregnancy
Quantitative Trait Loci
Permalink
https://hdl.handle.net/10161/15601
Published Version (Please cite this version)
10.1534/g3.113.006478
Publication Info
Zhu, Bin; Ashley-Koch, Allison E; & Dunson, David B (2013). Generalized admixture mapping for complex traits. G3 (Bethesda), 3(7). pp. 1165-1175. 10.1534/g3.113.006478. Retrieved from https://hdl.handle.net/10161/15601.
This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.
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Scholars@Duke

Ashley-Koch

Allison Elizabeth Ashley-Koch

Professor in Medicine
One of my major research foci is in the genetic basis of psychiatric and neurological disorders. I am currently involved in studies to dissect the genetic etiology of attention deficit hyperactivity disorder (ADHD), autism, chiari type I malformations, essential tremor, and neural tube defects. Additional research foci include genetic modifiers of sickle cell disease, and genetic contributions to birth outcomes, particularly among African American women.
Dunson

David B. Dunson

Arts and Sciences Distinguished Professor of Statistical Science
My research focuses on developing new tools for probabilistic learning from complex data - methods development is directly motivated by challenging applications in ecology/biodiversity, neuroscience, environmental health, criminal justice/fairness, and more.  We seek to develop new modeling frameworks, algorithms and corresponding code that can be used routinely by scientists and decision makers.  We are also interested in new inference framework and in studying theoretical properties
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