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Live and Carcass Measurements as Indicators of Lean Cut Yield in Swine¹

Oklahoma Agricultural Experiment Station, Stillwater 74074

Abstract

Data included a uniform group of 476 Hampshire market-weight pigs slaughtered over a 5-year period. The pooled within year, season and sex phenotypic correlations among the traits evaluated were calculated and stepwise regression was used to predict lean cut yields.

Probe backfat thickness tended to be more closely associated with most traits than was carcass backfat thickness. Shoulder probe correlations were of lower magnitude than either loin or rump probes. Probe backfat thickness and carcass backfat were more closely correlated with percent lean cuts of carcass weight (–.54 and –.52, respectively) than percent lean cuts of live weight (–.43 and –.36, respectively) or weight of lean cuts (–.26 and –.23, respectively). Correlations of 0.43, 0.52 and 0.57 were obtained for loin eye area with percent lean cuts of carcass weight, percent lean cuts of live weight and weight of lean cuts, respectively.

¹ Journal Article 2347 of the Oklahoma Agricultural Experiment Station, Stillwater. Research conducted by the Department of Animal Sciences and Industry.

² Present address: Atchison County Extension Office, Effingham, Kansas 66023.