J. Anim Sci.
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J. Anim Sci. 1958. 17:27-33.
© 1958 American Society of Animal Science
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Some Simple Cut Indices for Predicting Carcass Traits of Swine. II. Supplementary Measures of Leanness1

A. M. Pearson, L. J. Bratzler and W. T. Magee2

Michigan Agricultural Experiment Station,3

Abstract

Results of this study indicate that the various loin indices, especially the loin index and the trimmed loin-fatback ratio, reflect the various measures of leanness or fatness more accurately than percentage ham, percentage New York shoulder or percentage belly. Some evidence is presented which suggests the percentage of trimmed loin may reflect true leanness somewhat more accurately than either of the other loin indices. Percentage skinned ham and percentage New York shoulder were more accurate indicators of the supplementary measures of leanness than percentage belly, which was of little value.

Data are presented showing that carcass length and percentage loin are positively correlated, yet variation in length accounted for only 17 to 18 of the variability in percentage loin. Carcass length did not appear to influence percentage belly, percentage ham or percentage New York shoulder, which explains the low relationship between carcass length and cut-outs. Evidence is presented showing some basis for the assumption that dressing percentage increases with fatness. However, the association between various measures of fatness and dressing percentage is low.

Footnotes

1 Journal Article 2095 Michigan Agricultural Experiment Station, East Lansing.

2 Department of Animal Husbandry.

3 Acknowledgement is given to R. P. Soule, R. E. Rust and M. Vorkapich for collecting a portion of the data used.






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Copyright © 1958 by the American Society of Animal Science.