Grasas y Aceites, Vol 59, No 4 (2008)

A multivariate study of the triacylglycerols composition of the subcutaneous adipose tissue of Iberian pig in relation to the fattening diet and genotype


https://doi.org/10.3989/gya.2008.v59.i4.526

Isabel Viera-Alcaide
Food Characterization and Quality Department. Instituto de la Grasa (C.S.I.C.). Seville, Spain

Isabel M. Vicario
Faculty of Pharmacy. University of Seville., Spain

M. L. Escudero-Gilete
Faculty of Pharmacy. University of Seville., Spain

E. Graciani Constante
Food Characterization and Quality Department. Instituto de la Grasa (C.S.I.C.). Seville, Spain

Manuel León-Camacho
Food Characterization and Quality Department. Instituto de la Grasa (C.S.I.C.). Seville, Spain

Abstract


The triacylglycerol (TGs) composition of 1, 560 samples of subcutaneous fat of Iberian purebred and crossbred (iberianxDuroc) pigs reared extensively on three different feeding systems: montanera (M), cebo (C) and recebo (R), were determined. Seventeen TG species were identified by Gas Chromatography and six of them (POO, PSO, POL, OOO, SOO, OOL) accounted for 75 %. Significant differences (p < 0.01) were found for the majority of TG species among the three types of feeding. The effect of the duration of montanera on the TG composition was also explored and a significant positive correlation (p < 0.05) was found with the following TGs: OOO, SOL, OOL and OLL. After 110 days of Montanera, all the samples showed a percentage of OOO and OOL over 9.5 % and 4.5 % respectively. Genotype also showed a significant effect (p < 0.01) on the TG composition. Principal Component and Linear Discriminant analyses were applied to the data set. No clear separation among the three groups (M, R and C) according to the TG profile was achieved. Only M and C groups were clearly separated according to their TG composition.

Keywords


Iberian pig; Fatty acids; Multivariate analysis; Triacylglycerols

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