Efecto de la dieta de cerdos ibéricos sobre la composición en ácidos grasos del tejido adiposo y muscular / Effect of diet on the fatty acid composition of adipose and muscular tissue in Iberian pigs

Abstract

The fatty acid composition of total, apolar and polar lipid fractions from adipose and muscular tissues of Iberian pigs was determined. Animals were fed on diets of pasture and acorns (montanera), acorns and cereals (recebo) or cereals (cebo ). The principal fatty acids in the total and apolar lipid fractions from muscular tissue were C_18.1 (39-51%), C_16.0 (21-27%), C_18.0 (11-21%), C_18.2 (3-7%) and C_18.3 (1.7-5.4%). Significant differences were observed only in some cases. In the total lipid fraction from the muscular tissue significant differences (p ≤ 0.05) were found between all three batches for the C₁₆₁ fatty acid and between the cebo batch and the others for both C₁₈₁ and C_18:0. In total lipids from the adipose tissue, significant differences were found for both C₁₆₁ and C_18:3 between all three batches, and for C_16:1 and C_18:1 differences were observed only between the montanera batch and the others. The differences between batches in the apolar and polar frac tions were smaller than those for total lipids. A 100% partition among the three different diets studied was not obtained when a stepwise discriminant analysis was applied.

Keywords

Iberian pig fatty acids stepwise discriminant analysis

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