Abstract

Economic weights of traits in the breeding objective for Czech Holstein cattle Z. Krupová, M. Wolfová, E. Krupa, L. Zavadilová, & J. Přibyl Institute of Animal Science, P.O. Box 1, 104 01 Prague, Czech Republic Economic weights (EWs) of claw disease incidence (CLD), residual feed intake (RFI) and of further 10 production and functional traits currently included in the breeding objective for Czech Holstein cattle were estimated. In total, marginal and relative EWs of 14 traits were calculated under the actual production and economic conditions using the bioeconomic approach. Marginal EWs for the new traits were -100.1 € per case of CLD and -79.37, -37.05 and -6.33 € per kg daily DM intake for cows, heifers, and fattened animals, respectively. Marginal EW for the actual breeding objective traits ranked from -115.4 € (per case of clinical mastitis) to 406.0 € (per % of milk protein). The relative EWs for the new health trait and for RFI across all cattle categories were 1% and 7%, respectively. The highest relative EWs were found for milk yield (25%) and milk components (28%), for productive lifetime of cows (15%), and cow conception rate (14%). These traits remain highly important in the breeding objective, but actual EWs and genetic parameters should be applied to construct an actualised selection index. Taken into account welfare and environmental aspects of animal production, a new health trait along with RFI should also be considered. Keywords: dairy cattle, breeding objective, claw disease, residual feed intake

Z. Krupová, M. Wolfová, E. Krupa, L. Zavadilová, J. Přibyl

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Electronic Poster Session - Genetic gain - Breeding Objectives and Economics of Selection Schemes 2, , 458, 2018
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