Abstract
The Regression of Offspring on Mid-Parent (ROMP) method is a test of association between a quantitative trait and a candidate locus. ROMP estimates the trait heritability and the heritability attributable to a locus and requires genotyping the offspring only. In this study, the theory underlying ROMP was revised (ROMPrev) and extended. Computer simulations were used to determine the type I error and power of the test of association, and the accuracy of the locus-specific heritability estimate. The ROMPrev test had good power at the 5% significance level with properly controlled type I error. Locus-specific heritability estimates were, on average, close to simulated values. For non-zero locus-specific heritability, the proposed standard error was downwardly biased, yielding reduced coverage of 95% confidence intervals. A bootstrap approach with proper coverage is suggested as a second step for loci of interest. ROMPrev wasapplied to a study of cardiovascular-related traits to illustrate its use. An association between polymorphisms within the fibrinogen gene cluster and plasma fibrinogen was detected (p < 0.005) that accounted for 29% of the estimated fibrinogen heritability. The ROMPrev method provides a computationally fast and simple way of testing for association and obtaining accurate estimates of locus-specific heritability while minimizing the genotyping required.
Original language | English (US) |
---|---|
Pages (from-to) | 115-125 |
Number of pages | 11 |
Journal | Annals of Human Genetics |
Volume | 72 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2008 |
Keywords
- Association tests
- Candidate gene
- Cardiovascular disease
- Parent-offspring trios
- Quantitative trait
ASJC Scopus subject areas
- Genetics
- Genetics(clinical)