Using Identity-by-descent Information in Affected Sib Pairs to Increase the Efficiency of Genetic Association Studies

Autor: Wicks, Jacqueline, Treloar, Susan A., Martin, Nicholas G.
Zdroj: Twin Research and Human Genetics; April 2004, Vol. 7 Issue: 2 p211-216, 6p
Abstrakt: AbstractThe aim of this study was to determine whether identity-by-descent (IBD) information for affected sib pairs (ASPs) can be used to select a sample of cases for a genetic case-control study which will provide more power for detecting association with loci in a known linkage region. By modeling the expected frequency of the disease allele in ASPs showing IBD sharing of 0, 1, or 2 alleles, and considering additive, recessive, and dominant disease models, we show that cases selected from IBD 2 families are best for this purpose, followed by those selected from IBD 1 families; least useful are cases selected from IBD 0 families.
Databáze: Supplemental Index