Published in Scientific Papers. Series D. Animal Science, Vol. LXIII, Issue 1
Written by Mihaela IVANCIA, Dorel Dănuț DRONCA, Anca Mihaela MOCANU, Marius Giorgi USTUROI, Carmen Georgeta NICOLAE, Roxana Nicoleta RAȚU
It is known that the performances of the cows are influenced by the value of the mother and the value of the father for which it is important to know and group the performances so that the influence of the father can be highlighted. Therefore, the present study was conducted in order to identify the families of bulls, to study the performances of their daughters and also to determine their influence on these performances, analyzing the performances for milk production, percentage and quantity of fat and protein for cows that have completed maximum IV lactation. The biological material studied was grouped into 19 families with a total of 262 milk cows, the family with the highest milk production being given by the family with the Janther bull with an average production of 7975.80 ± 225.16 kg milk while the family with the smallest amount of milk was that of the bull Jecko Embriotransfer with an average production of 6474.20 ± 546.12 kg. The results obtained from this study indicate that the bull with the most influence on the descendants is the Janther bull, having the highest average yields on the quantity of milk, the quantity of fat in milk as well as on the quantity of proteins.
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