Breeding and genetic characteristics of sires of Kholmogory breed depending on their part of Holstein breed blood in different regions of the Russian Federation

Abstract

The purpose of the research was to study the breeding and genetic characteristics of Kholmogory breed sires depending on their part of Holstein breed blood in diff erent regions of the Russian Federation. An analysis of data was carried out on 13 sires owned by JSC “Head Reproduction Center” (Moscow region), JSC Head Bull Stud “Elita” (Republic of Tatarstan) and OJSC “Arkhangelsk Bull Stud” (Arkhangelsk region). The milk productivity of female ancestors was studied, as well as the milk productivity of daughters of Holstein sires of diff erent part of Holstein breed blood. It was established that the highest live weight at the age of 36 and 48 months was characterized by the sires of the JSC Head Bull Stud “Elita”. In this breeding enterprise the sires also had the highest blood level of Holstein breed (81,20 %) compared to the sires of other Bull Studs. The best indicators of milk yield per lactation were in the dams of sires at OJSC “Arkhangelsk Bull Stud” – 11 669,2 kg of milk per lactation, which were signifi cantly higher then in dams of sires from other Bull Studs. In second place were the dams of the sires of the JSC “Head Reproduction Center”, where the blood of the sires of the improving breed was the lowest at 20,25 %, at the same time they had more fat in milk (4,16 %) compared to dams of sires from other Bull Studs. The best result in milk productivity was obtained from daughters of sires of Kholmogory breed in the Republic of Tatarstan, which was in average 6845,2±468,05 (p < 0,05) kg of milk per lactation. This was signifi cantly more by 2087,2 kg of milk than from the daughters of the sires of JSC “Head Reproduction Center” and by 2795,0 kg of milk than from the daughters of the sires of OJSC “Arkhangelsk Bull Stud”.