Data consistingof 38,865 records of Large White pigs were used to estimate genetic parametersfor days to 100 kg (DAYS) and backfat thickness adjusted to 100 kg (BF). Covariancecomponents were estimated by a bivariate mixed model including the fixed effectof contemporary group and the direct and maternal additive genetic, common litterand residual random effects using the Gibbs Sampling algorithm of the MTGSAMprogram. Estimates of direct and common litter effects for DAYS and BF were0.33 and 0.44 and 0.09 and 0.02, respectively. Additive genetic correlationbetween DAYS and BF was close to zero (-0.015). The heritability estimates indicatethat genetic gains may be obtained by selection and that both traits shouldbe considered in a breeding program for the Large White breed.
