Evaluation of selected traits of sire dams of Slovak Spotted cattle
2001
Strapak, P. | Biro, D. | Halo, M. | Vavrisinova, K. | Juhas, P. | Debreceni, O. (Slovenska Polnohospodarska Univ., Nitra (Slovak Republic))
Milk efficiency, milkability and conformation of 611 sire dams of the Slovak Spotted breed of cattle were evaluated on 26 farms. In terms of a blood ratio and classification to particular parts of the herdbook, 422 dams were rated as S0 group (purebred and with a blood ratio improving breeds up to 12.5%), 97 dams as S1 group (a blood ratio of improving breeds up to 25%) and 92 dams as S2 group (a blood ratio of improving breeds up to 50%). From the point of view of milk effciency, the average milk yield by selected dams in whole milking period was 5253.06 kg milk (s=745.2) with a 4.24% fat content and a 3.35% protein content. During maximum lactation, dams produced 6,185 kg milk on average (s=993.18) containing 4.31 and 3.36% of fat and protein, respectively (226.28 and 207.46 kg, respectively). Evaluation of milkability traits revealed a maximum milk yield per minute of 3.13 kg, a relative milk yield per three minutes of 84.1% and an udder index of 49.2% in 103 dams. The above mentioned levels exceed standards specified in the breeding goal and markedly overrun average levels in Slovak Spotted breed of cattle. From assessing conformation traits it follows that dams in the first lactation reached a mean stature of 137.95 cm, a body length of 87.16 cm and a heart girth of 199.5 cm. As far as primary traits are concerned, there was a mean score of 6.22 for body frame, 5.79 for muscularity, 5.8 for legs, 5.95 for udder and 8.34 for udder quality. In comparison with all Slovak Spotted cattle population dams achieved higher levels in body measumerents as well as an average score of primary conformation traits. The results indicate strictness of selection based on forming conformation, with emphasis on body frame, legs and udder shape
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