An intercross between wild boar and a domestic Large White pig population wasused to map quantitative trait loci (QTL) for body proportions, weight ofinternal organs, carcass composition, and meat quality. The results concerninggrowth traits and fat deposition traits have been reported elsewhere. In thepresent study, all 200 F2 animals, their parents, and their grandparents weregenotyped for 236 markers. The marker genotypes were used to calculate theadditive and dominance coefficients at fixed positions in the genome of each F2animal, and the trait values were regressed onto these coefficients in intervalsof 1 cM. In addition, the effect of proportion of wild boar alleles was testedfor each chromosome. Significant QTL effects were found for percentage lean meatand percentage lean meat plus bone in various cuts, proportion of bone inrelation to lean meat in ham, muscle area, and carcass length. The significantQTL were located on chromosomes 2, 3, 4, and 8. Each QTL explained 9 to 16% ofthe residual variance of the traits. Gene action for most QTL was largelyadditive. For meat quality traits, there were no QTL that reached thesignificance threshold. However, the average proportion of wild boar allelesacross the genome had highly significant effects on reflectance and drip loss.The results show that there are several chromosome regions with a considerableeffect on carcass traits in pigs.