Grasas y Aceites, Vol 65, No 3 (2014)

Effect of genotype on fatty acid composition of intramuscular and subcutaneous fat of Celta pig breed


https://doi.org/10.3989/gya.0234141

R. Domínguez
Centro Tecnológico de la Carne de Galicia, Spain

J. M. Lorenzo
Centro Tecnológico de la Carne de Galicia, Spain

Abstract


A total of 45 Celta breed pigs were used to investigate the effect of genotype (Barcina, Carballiña and Santiaguesa lines) on the fatty acid composition of intramuscular (IMF) and subcutaneous fat (SF). The total IMF content was influenced by genotype (P < 0.05), since the Barcina line had the highest levels (5.21% vs 1.99 and 3.59% for Santiaguesa and Carballiña lines, respectively). The total and neutral lipids from the IMF of the Santiaguesa line displayed higher contents of PUFA than the other two lines. The nutritional indices were also affected by genotype, since the Santiaguesa line presented the lowest atherogenic (AI) and thrombogenic (TI) indices and the highest hypocholesterolemic/hypercholesterolemic ratio (h/H) (P < 0.05). The IMF total and neutral lipids presented higher (P < 0.05) values of MUFA than SF, while the PUFA content was greatest in SF (P < 0.05). Regarding the polar fraction, samples from IMF presented the highest values of PUFA (between 37–44%). Finally, SF showed higher percentages of MUFA and SFA than IMF (P < 0.05). The differences in IMF content and back fat thickness imply that the deposition of IMF and SF may be regulated by different mechanism among the three lines.

Keywords


Celta pig breed; Fatty acid profile; Genotype; Location in the carcass

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