Abstract:
:We present an approximate conditional and joint association analysis that can use summary-level statistics from a meta-analysis of genome-wide association studies (GWAS) and estimated linkage disequilibrium (LD) from a reference sample with individual-level genotype data. Using this method, we analyzed meta-analysis summary data from the GIANT Consortium for height and body mass index (BMI), with the LD structure estimated from genotype data in two independent cohorts. We identified 36 loci with multiple associated variants for height (38 leading and 49 additional SNPs, 87 in total) via a genome-wide SNP selection procedure. The 49 new SNPs explain approximately 1.3% of variance, nearly doubling the heritability explained at the 36 loci. We did not find any locus showing multiple associated SNPs for BMI. The method we present is computationally fast and is also applicable to case-control data, which we demonstrate in an example from meta-analysis of type 2 diabetes by the DIAGRAM Consortium.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Yang J,Ferreira T,Morris AP,Medland SE,Genetic Investigation of ANthropometric Traits (GIANT) Consortium.,DIAbetes Genetics Replication And Meta-analysis (DIAGRAM) Consortium.,Madden PA,Heath AC,Martin NG,Montgomery GW,Weedon MN,Lodoi
10.1038/ng.2213subject
Has Abstractpub_date
2012-03-18 00:00:00pages
369-75, S1-3issue
4eissn
1061-4036issn
1546-1718pii
ng.2213journal_volume
44pub_type
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