title: A unified Haseman-Elston method for testing linkage with quantitative traits.
abstract: The Haseman and Elston (H-E) method uses a simple linear regression to model the squared trait difference of sib pairs with the shared allele identical by descent (IBD) at marker locus for linkage testing. Under this setting, the squared mean-corrected trait sum is also linearly related to the IBD sharing. However, the resulting slope estimate for either model is not efficient. In this report, we propose a simple linkage test that optimally uses information from the estimates of both models. We also demonstrate that the new test is more powerful than both the traditional one and the recently revisited H-E methods.
authors.affiliation: Program for Population Genetics, Harvard School of Public Health, Boston, MA, 02115, USA. xin_xu@harvard.edu
authors.forename: X
authors.initials: X
authors.lastname: Xu
authors.forename: S
authors.initials: S
authors.lastname: Weiss
authors.forename: X
authors.initials: X
authors.lastname: Xu
authors.forename: L J
authors.initials: LJ
authors.lastname: Wei
mesh_terms: D000483:Alleles; D002874:Chromosome Mapping / Q000379:methods* / Q000706:statistics & numerical data*; D005787:Gene Frequency / Q000235:genetics; D008040:Genetic Linkage / Q000235:genetics*; D005838:Genotype; D006801:Humans; D016014:Linear Models; D016555:Matched-Pair Analysis; D008957:Models, Genetic; D009679:Nuclear Family; D019655:Quantitative Trait, Heritable