Milk protein variants influence milk yield, longevity and health of dairy cows
2000
Hanus, O. | Beber, K. | Kopecky, J. | Jedelska, R. (Vyzkumny Ustav pro Chov Skotu, Rapotin (Czech Republic)) | Cermak, V.
Relationships between longevity and lifetime production characteristics and genetic polymorphism of milk proteins were studied in 288 Red-Pied and Black-Pied dairy cows. For example, the presence of kappa casein B allele increases the casein number (from 82.2 to 84.4 %). Thanks to specific reasons (relative increase of Black-Pied stock, crossing of red-Pied population with high-yielding dairy breeds) the frequency of kappa casein B allele in the Czech dairy cow population decreased during the last 30 years from 42 % to about 31 %. To stop this trend it is necessary to adopt a new breeding strategy.
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