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    • IJAFR, volume 44, 2005
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    Post-weaning performance and carcass characteristics of steer progeny from different suckler cow breed types

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    Author
    Drennan, Michael J
    McGee, Mark
    Keane, Michael G.
    Keyword
    Carcass Composition
    Carcass Growth
    Dam Breed Type
    Date
    2005
    
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    URI
    http://hdl.handle.net/11019/476
    Citation
    M.J. Drennan, M. McGee, M.G. Keane. (2005) Post-weaning performance and carcass characteristics of steer progeny from different suckler cow breed types. Irish Journal of Aricultural and Food Research 44: 195-204
    Abstract
    In two experiments a total of 44 steer progeny of spring-calving Charolais (C) and Hereford × Friesian (HF) suckler cows and C sires were slaughtered at approximately 2 years of age. Following weaning they were offered silage and 1 kg of concentrate per head daily during a 5 month winter after which they spent 7 months at pasture. In Experiment 1, animals were given a silage/concentrate diet during a finishing period of either 95 or 152 days. In Experiment 2, steers were offered either a daily diet of silage plus 6 kg of concentrates or concentrates to appetite plus 5 kg of silage(fresh weight)during the final 140-day finishing period. Following slaughter, an 8-rib pistola from each animal was dissected. For the two experiments combined C and HF progeny had carcass weights of 372 and 385 (s.e. 6.1) kg, proportions of carcass as pistola of 467 and 454 (s.e. 2.8) g/kg and pistola meat proportions of 676 and 642 (s.e. 5.1) g/kg, respectively. All fat traits were lower for the C than HF progeny but there was no difference in carcass conformation score. Increasing slaughter weight increased carcass weight (P < 0.001), kidney plus channel fat weight (P < 0.001), and pistola fat proportion(P < 0.001) and decreased the proportions of carcass as pistola (P < 0.05), pistola meat (P < 0.01), and bone (P < 0.05). In conclusion, breed type had no effect on carcass growth but the C progeny had higher meat yield than the HF. Increasing slaughter weight increased fatness and reduced meat yield.
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    Livestock Systems
    IJAFR, volume 44, 2005
    Animal & Bioscience

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