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Descripción
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| A total of 360 pigs was used to study the influence of gender (immunocastrated males, IM; surgically castrated males, CM; intact females, IF) and terminal sire line (Top York; Tempo) on carcass and meat quality of pigs slaughtered at 125 kg BW. The female line used was Large White x Landrace in all cases. The IM pigs received two doses of Improvac (76 and 124 d of age, 7 wk before slaughter). Backfat thickness (BF) was measured the day of slaughter in live pigs, using an ultrasound scanner, and postmortem, using a flexible ruler. Meat samples were taken at m. Longissimus dorsi and analyzed by NIR. Treatments were arranged factorially (3 x 2) with 6 replicates (10 pigs/pen) per treatment. The IM pigs had less carcass yield than IF and CM (77.2 vs. 79.1 and 78.7%; P<0.001). Also, IM and IF had less BF than CM (P<0.001) when measured by ultrasound scanner or after slaughter. The correlation coefficient between the in vivo and the postmortem methods was r = 73% (P<0.001). Fresh (14.8 vs. 14.6 vs. 14.5%) and trimmed (13.2 vs. 13.0 vs. 12.9%) ham yields were higher for IF than for CM with IM being intermediate (P<0.05). Also, IF had higher loin yield than IM and CM (P<0.01). Meat from IM and CM had more intramuscular fat (3.93 and 4.03 vs. 3.52%; P<0.01) than meat from IF. No differences between sire lines were observed for carcass yield, BF or pH24. Crossbreds from Top York presented higher fresh (14.8 vs. 14.5%; P<0.05) and trimmed (13.2 vs. 13.0%; P<0.05) ham yield but lower loin yield (P<0.01) than crossbreds from Tempo. Meat from Tempo crossbreds had more intramuscular fat content than meat from Top York crossbreds (4.01 vs. 3.64%; P<0.01). We conclude that IM and CM present similar values for carcass and meat quality traits. Crossbreds with Top York sire line had better carcass quality but poorer meat quality than crossbreds of Tempo sire line. | |
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Internacional
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Si |
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Nombre congreso
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99th Poultry Science Association Annual Meeting |
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Tipo de participación
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960 |
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Lugar del congreso
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Denver |
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Revisores
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No |
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ISBN o ISSN
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0-8134-2929-3 |
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DOI
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Fecha inicio congreso
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11/07/2010 |
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Fecha fin congreso
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15/07/2010 |
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Desde la página
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365 |
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Hasta la página
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365 |
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Título de las actas
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Poultry Science, 89 (1): 365 |