Effect of feeding high-oleic-acid peanuts to growing-finishing swine on resulting carcass fatty acid profile and on carcass and meat quality characteristics.
A high-oleic-acid peanut breeding line was used in a study designed to determine the effects of feeding swine diets containing elevated levels of monounsaturated fatty acids as a means to increase the level of monounsaturates and total unsaturates in the resulting carcass fat. Forty-eight pigs were allotted to four treatments that consisted of corn-soybean meal diets that contained 1) high-oleic peanuts (HOP), 2) regular commercial peanuts (RP), or 3) canola oil (CO), each added at a dietary level to provide 10% added fat/oil, and 4) a control diet with no added fat/oil. The oil of HOP averaged 75% oleic acid vs 60% for CO and 53% for RP. The pigs were fed the experimental diets from 33 to 102 kg BW, after which all pigs were slaughtered. All three dietary oil sources resulted in increases (P < .01) of monounsaturates in the backfat; the HOP diet resulted in the greatest increase (32% greater than control). Both CO and RP increased (P < .01) the level of polyunsaturates by nearly twofold; HOP resulted in a small decrease. Total unsaturates increased (P < .01) by 24, 24, and 27% for HOP, RP, and CO treatments, respectively, over that obtained from the control treatment. Carcass fat was softer/oilier (P < .05) from pigs fed CO and RP diets, but not from those fed HOP diets, compared with carcass fat of pigs fed the control diet. Dietary fat/oil source had no effect (P > .05) on other carcass compositional traits and various meat quality attributes.(ABSTRACT TRUNCATED AT 250 WORDS)
Myer
R O
RO
Department of Animal Science, University of Florida, Gainesville 32611.
Johnson
D D
DD
Knauft
D A
DA
Gorbet
D W
DW
Brendemuhl
J H
JH
Walker
W R
WR
D000273:Adipose Tissue / Q000033:anatomy & histology / Q000737:chemistry; D000821:Animal Feed; D000818:Animals; D010367:Arachis; D004042:Dietary Fats, Unsaturated / Q000008:administration & dosage*; D005227:Fatty Acids / Q000032:analysis*; D005260:Female; D008297:Male; D008460:Meat / Q000032:analysis / Q000592:standards*; D009132:Muscles / Q000033:anatomy & histology; D013552:Swine / Q000033:anatomy & histology* / Q000254:growth & development; D015430:Weight Gain
D004042:Dietary Fats, Unsaturated; D005227:Fatty Acids