Abstract
In order to evaluate the effect of dietary fat on the modification of the muscle and adipose tissue of swine, 64 pigs weighing approximately 20kg were assigned to treatment by weight and sex. Treatments were arranged in a 2×2 factorial design, with sunflower oil or a high-oleate sunflower oil at levels of 3 or 6% of the diet. Tissue samples were removed from the ham and loin, and the subcutaneous fat surrounding the ham and loin at 40,54,68, and 82kg BW by shot-biopsy. Hogs were marketed at 106kg BW and samples were also taken postslaughter. Fatty acid profiles were determined by gas chromatography. There were no (P<.05) differences in average daily gain, average daily feed intake, or feed efficiency. Fatty acid composition of both muscle and adipose tissue was altered (P<.05) by both level and source of dietary fat. The use of high-oleate sunflower oil increased (P<.05) the oleic acid composition of muscle and fat tissue.
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