Evaluation of sources of variation for the weight of 5 pork primal and subprimal cut weights

ABSTRACT The objective of this trial was to evaluate sources and magnitude of variation for pork cut weights. The weights of 5 primal and subprimal cuts were evaluated from 1,688 barrows and gilts of 3 sire and 2 dam lines at target market BW of 113, 127, or 141 kg. The cut-weight data were fitted to an allometric function of carcass weight (cut weight, kg = A · CW B ), where A is a scalar parameter, B is the allometric coefficient, and CW = carcass weight. The equation was linearized as log 10 (cut weight, kg) = log 10 A + Blog 10 (CW) and included the fixed effects of sire line, dam line, and sex and their interactions with log 10 CW. The predicted values of the cut weights were included in a model including the random effects of replicate, room within replicate, and pig and fixed effect of side. Left-side weights were greater (P