It is revealed that the use of Holstein and Swedish red-marked breed highly-productive bulls-producers on red-marked breed dam facilitates the descendant indicator increase of dairy efficiency on the milk yield for 21,4 24,8 %, milk fat mass fraction for 0,04-0,06 %, milk protein mass fraction by 0,05-0,07 %, live weight growth of Holstein bulls descendants by 0,78 % and its decrease by 0,79 % of red-marked Swedish breed descendants.
breed, crossing, descendants, forage nutrients, lactation, lactation phases, the beginning of milking, the middle and the termination
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