Materials and Methods Two genotypes which have different rates of lean growth and fat deposition were identified. Line 1 is a European Large White Landrace which represents the upper 5th percentile for percent lean. Line 2 is a commercial terminal cross which represents average U.S. pigs for percent lean. Carrier pigs had small but nonsignificant advantages for carcass composition. No significant effect of the halothane gene was detected for marbling or any of the carcass composition traits.
Least squares means for meat quality and carcass composition.