ALTERNATIVE PORK CARCASS EVALUATION TECHNIQUES .1. DIFFERENCES IN PREDICTIONS OF VALUE

Dissected and predicted wholesale and lean boneless values for 154 por k carcasses representing seven genotypes with substantial variation in carcass composition and percentage of lean were determined. Dissected carcass value was determined using a component pricing model, and fou r alternative models were specified to predict that value. The models included measurements from a ruler (RULER) and two carcass evaluation technologies, Hennessy probe (PROBE) and electromagnetic scanner (EMS1 ). A combination of the PROBE and EMS1 models (EMSB) was also used. Fo r wholesale value, R(2) were .40, .70, .59, and .74, and the RSD were 8.18, 5.77, 6.76, and 5.38 ($/100 kg of carcass value) for RULER, PROB E, EMS1, and EMS2, respectively. For lean boneless value, the R(2) wer e .41, .73, .59, and .74, and the RSD were 8.34, 5.67, 6.99, and 5.51 ($/ 100 kg of carcass value) for RULER, PROBE, EMS1, and EMSB, respect ively. The results indicate that a combination of probe and electromag netic scanner measurements provided the best fit to dissected value.