Efecto de la edad de sacrificio en el perfil de ácidos grasos de cerdos de raza Celta

El cerdo Celta es una raza autóctona del noroeste de España, caracterizada por su rusticidad y su adaptación a las condiciones ambientales, por lo que pueden ser criados en régimen extensivo y semi-extensivo. Se estudió el efecto de la edad de sacrificio (12, 14 y 16 meses) en el perfil de ácidos grasos del cerdo Celta. Para este estudio fue usado el músculo longissimus dorsi de 45 machos castrados del genotipo Carballiña. El análisis estadístico revela que los ácidos grasos más abundantes fueron los monoinsaturados, los cuales no mostraron diferencias (P>0.05) entre las edades de sacrificio. El contenido en ácidos grasos saturados incrementó (P

Breed effect between Mos rooster (Galician indigenous breed) and Sasso T-44 line and finishing feed effect of commercial fodder or corn

The aim of this research was to study the Mos rooster breed growth performance, carcass, and meat quality. The breed effect (Mos vs. Sasso T-44) and finishing feed in the last month (fodder vs. corn) on animal growth, carcass characteristics, meat quality, and fatty and amino acid profiles were studied using a randomized block design with initial weight as covariance. In total, 80 roosters (n = 30 of Sasso T-44 line and n = 50 of Mos breed) were used. They were separated by breed and allocated to 2 feeding treatment groups (concentrate and corn). Each feeding treatment group consisted of 15 and 25 roosters, for Sasso T-44 line and Mos breed, respectively. Finishing feeding did not affect growth parameters in the 2 genotypes of rooster tested (P > 0.05). Nonetheless, the comparison between both types of roosters led to significant differences in growth parameters (P < 0.05). Regarding carcass characteristics, no significant influences of finishing feeding treatment (P > 0.05) were found, and as expected, carcass weight clearly differed between genotypes due to the lower growth rate of Mos roosters. However, drumstick, thigh, and wing percentages were greater in the Mos breed than in the hybrid line. In color instrumental traits, roosters feeding with corn showed breast meat with significantly (P < 0.001) higher a* and b* values than those of cocks feeding with commercial fodder. Values of shear force were less than 2 kg for both genotypes, thus it can be classified as very tender meat. Finishing with corn significantly increased (P < 0.001) the polyunsaturated fatty acid content in the breast; the Mos breed had a polyunsaturated to saturated fatty acid ratio of 0.73. The amino acid profile of the indigenous breed was not similar to that of the commercial strain. Finishing feeding treatment had a greater influence than breed effect on amino acid profile.