Multipoint oligogenic linkage analysis of quantitative traits

J Blangero, L Almasy - Genetic epidemiology, 1997 - Wiley Online Library
J Blangero, L Almasy
Genetic epidemiology, 1997Wiley Online Library
We present an overview of pedigree‐based variance component linkage methods and
discuss their extension to oligogenic inheritance. As an example, oligogenic linkage
analyses were performed using the quantitative trait Q4 from the GAW10 simulated data set.
A strategy involving sequential oligogenic analyses was found to have increased power to
detect the three quantitative trait loci (QTL) influencing Q4 when compared to the classical
marginal approach of requiring each locus to have a lod score≥ 3. However, it is shown that …
Abstract
We present an overview of pedigree‐based variance component linkage methods and discuss their extension to oligogenic inheritance. As an example, oligogenic linkage analyses were performed using the quantitative trait Q4 from the GAW10 simulated data set. A strategy involving sequential oligogenic analyses was found to have increased power to detect the three quantitative trait loci (QTL) influencing Q4 when compared to the classical marginal approach of requiring each locus to have a lod score ≥ 3. However, it is shown that requiring conditional lod scores ≥ 3 in the sequential analyses may be overly conservative and alternative criteria for the acceptance of multilocus models are discussed. © 1997 Wiley‐Liss, Inc
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