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Journal of Animal Science, Vol 70, Issue 7 2175-2181, Copyright © 1992 by American Society of Animal Science

JOURNAL ARTICLE

Characterization of lipid in loin and bacon from finishing pigs fed full-fat soybeans or tallow

D. E. Leszczynski, J. Pikul, R. A. Easter, F. K. McKeith, D. G. McLaren, J. Novakofski, P. J. Bechtel and D. E. Jewell
Harlan E. Moore Heart Research Foundation, Champaign, IL 61820.

This experiment tested whether the lipid composition of pork could be altered by changes in dietary lipid, that what effects these changes would have on production and meat characteristics. Pigs were fed diets containing 10 or 20%+ extruded full-fat soybeans (FFS) or 4% tallow for a 3- or 6-wk finishing period, with a corn-soybean meal diet fed as a control. Seventy barrows and 70 gilts were allotted into seven treatment groups with four pens per group. Analysis was on 28 experimental units, which were composite samples from pens. The significance of treatment, sex, and treatment x sex interaction F-statistics was evaluated on chloroform-methanol extractable total lipid, triacylglycerol, phospholipids, cholesterol, individually fatty acids (FA), and the major classes of FA obtained from longissimus muscle and bacon. Treatment effects (P less than .05) were detected for cholesterol content of longissimus and for total lipid and phospholipid content of bacon. Treatment effects (P less than .01) were detected for monoenoic, dienoic, and polyenoic (P) FA in both tissues, and for saturated (S) FA in bacon (P less than .05). Treatment effects (P less than .001) were detected in both tissues for the P:S ratio. The P:S ratio increased 54% for longissimus and 100% for bacon in the pigs fed FFS for 6 wk compared with pigs consuming a corn-soybean meal diet.


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Copyright © 1992 by the American Society of Animal Science.