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Arquivo Brasileiro de Medicina Veterinária e Zootecnia

On-line version ISSN 1678-4162

Abstract

LANDIM, A.V. et al. Performance and carcass traits of Rabo Largo lambs and crossbreeding with Santa Inês. Arq. Bras. Med. Vet. Zootec. [online]. 2017, vol.69, n.5, pp.1267-1274. ISSN 1678-4162.  http://dx.doi.org/10.1590/1678-4162-9210.

The aim of study was to evaluate the effect of crossbreeding among native sheep on performance and traits carcass. Twenty intact lambs, male, at four months of age, with an initial weight of 19.0±5.11kg, were distributed in two groups genetics: Rabo Largo (RL) e Santa Inês x Rabo Largo (F1SI x RL), in a completely randomized design. The animals were finished in feedlot by 70 days. The lambs F1SI x RL showed higher weight at weaning, to slaughter, of the empty body, and hot and cold carcass, and increased biological yield. Higher values for carcass morphometry in F1SI x RL animals were found in comparison to Rabo Largo animals (P<0.05). The weight of half-carcass and the commercial cuts were higher for lambs. On the measurements obtained in muscle Longissimus dorsi, Rabo Largo lambs showed higher values for subcutaneous fat thickness. The use of the breed Santa Inês like base paternal may bring in improvements in lambs’s carcass characteristics Rabo Largo and may be recommended in sheep meat production systems.

Keywords : sheep; carcass yield; crossbreeding; naturalized.

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