The genetic background affects composition, oxidative stability and quality traits of Iberian dry-cured hams: Purebred Iberian versus reciprocal Iberian x Duroc crossbred pigs

This study examined the physico-chemical characteristics, oxidative stability and sensory properties of Iberian cry-cured hams as affected by the genetic background of the pigs: purebred Iberian (PBI) pigs vs reciprocal cross-bred Iberian x Duroc pigs (IB x D pigs: Iberian dams x Duroc sires; D x IB pigs: Duroc dams x Iberian sires). Samples from PBI pigs contained significantly higher amounts of IMF, monounsaturated fatty acids, heme pigments and iron than those from crossbred pigs. The extent of lipid and protein oxidation was significantly larger in dry-cured hams of crossbred pigs than in those from PBI pigs. Dry-cured hams from PBI pigs were defined by positive sensory properties (i.e. redness, brightness and juiciness) while hams from crossbred pigs were ascribed to negative ones (i.e. hardness, bitterness and sourness). Hams from PBI pigs displayed a superior quality than those from crossbred pigs. The position of the dam or the sire in reciprocal Iberian x Duroc crosses had no effect on the quality of Iberian hams. (C) 2013 Elsevier Ltd. All rights reserved.