title: An efficient method to handle the 'large p, small n' problem for genomewide association studies using Haseman-Elston regression.
abstract: The 'large p, small n' problem in genomewide association studies (GWAS) is an important subject in genetic studies. Many approaches have been proposed for this issue, but none of them successfully combine the Haseman-Elston (H-E) regression with sliding-window scan approaches in GWAS. In this article, we extended H-E regression to GWAS, and replaced original data with different measurements of phenotype of sib pairs. Meanwhile, we also applied hidden Markov model to infer identity by state. Using subsequent simulation studies, we found that it had higher statistical power than the corresponding single-marker association studies. The advantage of the H-E regression was also sufficient to capture about 48.01% of the quantitative trait locus (QTL). Meanwhile, the results show that the power decreases with the increase in the number of QTLs, and the power of H-E regression is sensitive to heritability.
authors.affiliation: Agriculture Department, Hetao College, Bayannur 015000, People's Republic of China. meibujun@iastate.edu.
authors.forename: Bujun
authors.initials: B
authors.lastname: Mei
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Wang
mesh_terms: D000465:Algorithms; D000818:Animals; D003198:Computer Simulation; D056726:Genetic Association Studies / Q000379:methods; D055106:Genome-Wide Association Study / Q000379:methods*; D006801:Humans; D040582:Inheritance Patterns; D051379:Mice; D008957:Models, Genetic; D020641:Polymorphism, Single Nucleotide; D040641:Quantitative Trait Loci; D019655:Quantitative Trait, Heritable; D012044:Regression Analysis