An analysis of fattening performance and carcass quality of crossbreds of Czechoslovakian breeds with North Caucasus Mutton-Wool sheep

Slana, O.; Jakubec, V.; Sykorova, A.

Zivocisna Vyroba 30(5): 447-454

1985


ISSN/ISBN: 0044-4847
Accession: 001297212

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Abstract
Data were obtained on 394 Czech Merino, Tsigai, Improved Valachian and Improved Sumava lambs, and on crossbreds of these breeds with North Caucasus Mutton-Wool sheep. For the whole group, age at the beginning of fattening averaged 94.4 days and body weight 22.3 kg, body weight at the end of fattening 34.2 kg, and daily gain 226 g. Body weights of crossbreds to the end of fattening (30.4-36.4 kg) were mostly significantly higher than those for purebreds (33.4-34.5 kg). Daily gains of crossbreds (220-236 g) were mostly significantly higher than those for purebreds (217-233 g). Differences in the 2 traits between ram and ewe lambs, and between single- and twin-born lambs, were significant. The overall averages for carcass weight, dressing percentage, eye-muscle area, leg weight as a percentage of half-carcass weight, and the percentage of kidney fat were 16.2 kg, 44.5, 11.7 cmsuperscript 2, 32.0 and 1.9 resp., the differences between purebreds and crossbreds, sex differences, and differences between single-and twin-born lambs being significant.