Growth ability, carcass and meat quality of lambs of the German Long-wooled sheep and their crosses
2001
Kuchtik, J. | Horak, F. (Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic))
Ram and ewe lambs of the genotypes of German Long-wooled (GL, n = 15/14), F1 crosses of the German Long-wooled x Oxford Down (GL x OD, n = 15/15) and the F12 (Merino x German Long-wooled) x Oxford Down (M x GL) x OD, (n = 12/12), were fattened in a semi-intensive fattening system involving grazing on an alfalfa-grass mixed sward. In terms of growth evaluation the investigations showed the effect of fathers of the Oxford Down meat breed. The highest growth ability of ram lambs in the period from birth to weaning, and/or from birth to 100 days of age, was determined for (M x GL) x OD (0.231 and 0.250 kg, respectively). The difference from the ram lambs with genotype GL was statistically highly significant in the period from birth to weaning and statistically significant in the period from birth to 100 days of age. Evaluation of the basic parameters of carcass analyses of ram lambs showed that the effect of the respective genotypes on these parameters was not significant. The proportions of leg, rib and rack were the highest in GL. The proportions of the individual tissues were evaluated in the right leg and right rack, and the highest proportion of muscle (67.60 and 66.65 %), or the lowest proportion of fat (5.13 and 5.80 %), was found in GL x OD. Based on the analyses of quality parameters, the lowest proportion of intramuscular fat (2.5 %), and the highest proportion of protein (19.39 %) and ash (1.05 %) were found in the GL genotype.
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