All quantitative trait loci (QTL) for body weight at 112 days of age detected by forward selection and SIM. The QTL detected using a forward selection search are presented on the diagonal (F). All QTL pairs that were detected by SIM (S) or both forward selection and SIM (FS) are presented above the diagonal. QTL pairs where the epistatic model was selected by a randomization test are presented below the diagonal (E). The results are given for a 5%, 10%, and 20% genome-wide significance threshold. The full designation of linkage group E47 is E47W24.