Abstract
Heterozygous calves for the double muscled gene were compared with normal calves in British breeds of cattle for the performance traits of growth, food intake and body composition. There were advantages for the heterozygote in weight per day of age, dressing percentage and carcase cutability. The estimated advantage for the trait of weight of boneless retail cuts per day of age was 7.6% over the normal. Heterozygotes tended to have less marbling in the rib eye muscle and lower quality grades but the effect on acceptability of meat was minimal.
Résumé
Nous avons comparé les caractéristiques de croissances, consommation d’aliments et composition corporelle, de veaux hétérozygotes pour le géne culard et de veaux normaux de races britanniques. Les hétérozygotes sont supérieurs pour le poids par jour de vie, le rendement à l’abattage et la découpe des carcasses. L’estimation de leur supériorité pour le poids de morceaux découpés et sans os, produit par jour de vie, est de +7.6% par rapport aux normaux. Les hétérozygotes tendent à avoir moins de persillé au niveau du muscle long dorsal et des qualités de carcasses (classification) inférieures, mais sans pour autant affecter considérablement les qualités de la viande.
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© 1982 ECSC, EEC, EAEC, Brussels-Luxemburg
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Thiessen, R.B., Rollins, W.C. (1982). A Comparison of Normal and Heterozygous Animals for Double Muscling in British Breeds of Cattle. In: King, J.W.B., Ménissier, F. (eds) Muscle Hypertrophy of Genetic Origin and its use to Improve Beef Production. Current Topics in Veterinary Medicine and Animal Science, vol 16. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-7550-7_3
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DOI: https://doi.org/10.1007/978-94-009-7550-7_3
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