Evaluation of the results obtained from crossbreeding Jersey, Danish Red, Belgian Red and Black-and-White cattle on the basis of double-, triple-, and multibreed crosses. 2. Milk utility and fertility of doublebreed crosses
1985
Goszczynski, J. (Polska Akademia Nauk, Popielno (Poland). Inst. Genetyki i Hodowli Zwierzat. Zaklad Doswiadczalny)
The crossbreds obtained from mating Jersey and Danish Red cattle were characterized by a high content of fat and protein in milk, a high milk productivity and good milking ability. However, there were negative results of crossing Danish Red with Jersey breeds: a slight prolongation of the service period and age at first mating. The Jersey x Belgian Red crossbreds had a statistically lower content of fat and protein in milk than the Jersey x Danish Red crossbreds. The favourable influence of the Belgian Red breed was related to the traits connected with fertility and live weight
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