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Fatty Acid Composition of Adipose Tissue from Lean and Obese Swine

US Department of Agriculture^,4,5,, Clay Center, NE 68933

³ Author to whom correspondence should be addressed.

Abstract

The fatty acid composition of subcutaneous adipose tissue from three lines of swine (genetically selected obese and lean and a contemporary crossbred line) was determined during the growing period between 3 and 6 months of age. The developmental pattern for individual fatty acids was complex, and breed x age interactions generally were observed. There were more saturated fatty acids in the obese swine than in the other two breeds, primarily the result of greater amounts of 14:0 and 16:0 acids and less 18:2 acid. The degree of saturation may result from genetic selection via unknown mechanisms, from selection for altered lipid metabolism, e.g., increased de novo fatty acid synthesis in the obese relative to the other breeds — or from the extent of obesity. The tendency for the proportion of saturated fatty acids to increase in all breeds with age also may be associated with the extent of obesity.

¹ Present address: Agriculture Department, AF, Berry College, Mt. Berry, GA 30149.

² Present address: Dept. of Anim. Sci., Univ. of Minnesota, St. Paul 55108.

⁴ Roman L. Hruska US Meat Animal Research Center, SEA-AR.

⁵ Mention of a trade name, proprietary product or vendor does not constitute a guarantee or warranty by the USDA and does not imply its approval to the exclusion of other products or vendors that may be suitable.