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Effect of castration of females on meat quality and fatty acid profile of backfat in Iberian pigs reared under intensive production systems
Year:2008
Research Areas
  • Animal production
Information
Abstract
Iberian (IB) pigs are the ancestral dark?Chaired pigs of Spain. Currently, 80% of IB pigs are reared under intensive production systems and slaughtered at 140?C150 kg body weight (BW). Both sexes are castrated. However, the production of heavy white pigs destined to dry?Ccured products is based on intact females (IF). Therefore, IF might be also an alternative to castrated females (CF) for IB pig production. A total of sixty crossbred (IB dam ¡Á Duroc sire) females, 80 d of age (17.6 ¡À 0.13 kg BW) was used to investigate the effect of castration of females on fresh meat quality and fatty acid profile of backfat (BF) of IB pigs reared under intensive production systems and slaughtered at 144 kg BW (269 d of age). Females were ovariectomized at 93 d of age (26.0 ¡À 0.19 kg BW). Meat samples were taken at m. Longissimus dorsi at the level of the last rib and BF samples were taken at the tail insertion. Each treatment (coded IF, CF) was replicated five times and the experimental unit was a pen with six pigs. Castrated females had 27.2% more fat and 2.7% less moisture in the m. Longissimus dorsi than IF (P ¡Ü 0.05). Muscular fat content was lower for IF than for CF (6.6 vs. 9.1%; P ¡Ü 0.05) but in all cases fat content was higher than required to generate high quality dry?Ccured products. Meat from IF was more lightness (higher L* value; P ¡Ü 0.01), redder (10.1 vs. 7.5 for a*; P ¡Ü 0.001), and had more intensive colour (16.7 vs. 11.2 for c*; P ¡Ü 0.001) than meat from CF. Subcutaneous fat was more saturated (39.1 vs. 38.2%; P ¡Ü 0.05) in CF than in IF, mostly because of the higher palmitic acid content (P ¡Ü 0.05). Also, CF had lower linolenic acid content (0.61 vs. 0.68%; P ¡Ü 0.05) than IF. We conclude that based on animal welfare, cost of castration, meat quality traits, and fatty acid profile, intact females are a good alternative to castrated females to produce high quality Iberian dry?Ccured products.
International
Si
Congress
Joint ADSA-ASAS Annual meeting
960
Place
Indianapolis, Estados Unidos
Reviewers
Si
ISBN/ISSN
0021-8812
Start Date
07/07/2008
End Date
11/07/2008
From page
37
To page
37
Journal of Animal Science
Participants
  • Autor: Gonzalo Gonzalez Mateos (UPM)
  • Autor: Rosa Pilar Lazaro Garcia (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Producción Animal
  • Departamento: Producción Animal
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