Abstract
Based on the use of the best domestic and world gene pool of the Holstein breed, a domestic highly productive breed of cattle with a genetic potential of more than 10 000 kg of milk per lactation adapted to the climatic conditions of Siberia was created. When breeding it, different reproductive crosses were used. As a result, a competitive livestock breed with a population of 26 770 heads was obtained. The productivity of 10 129 cows at the time of breed testing averaged 7,461 kg of milk with a fat content of 3.78% and a protein content of 3.16%. In terms of milk yield and protein content in milk, they surpass Black-and-White cows by 1,460 kg and 0.05%, respectively. However, the animals of the original breed have a higher fat content of milk, by 0.14%. The live weight of cows of Sibiryachka breed is 36 kg (6%) more than that of Black-and-White cows. Young animals of the new breed are intensively growing and developing. At all ages, their live weight is higher than Black-and-White peers. The average daily increase from birth to one year for heifers of the new breed was 770 g, for Black-and-White peers – 700 g. For a growing period of up to 18 months, daily growth averaged 706 and 673 g, respectively. The live weight of heifers at 18 months is 424 kg, Black-and-White – 405 kg, which allows insemination of heifers of Sibiryachka breed 24 days earlier. The average yield of calves over 3 years in the new breed was 82.7%, in the original one it was 3.7% less. The period of use of the cows of the created breed is 3.47 calving, which is 8% more compared to the Black-and-White breed.
Highlights
Conflict of interest The authors declare no conflict of interest
Based on the use of the best domestic and world gene pool of the Holstein breed, a domestic highly productive breed of cattle with a genetic potential of more than 10 000 kg of milk per lactation adapted to the climatic conditions of Siberia was created
Young animals of the new breed are intensively growing and developing. Their live weight is higher than Black-and-White peers
Summary
1,2 Яранцева С.Б., 1 Герасимчук Л.Д., 1 Шишкина М.А. 1Сибирский федеральный научный центр агробиотехнологий Российской академии наук Новосибирская область, р.п. Новая порода крупного рогатого скота молочного направления Сибирячка // Сибирский вестник сельскохозяйственной науки. Среднесуточный прирост от рождения до года у телок новой породы был 770 г, у черно-пестрых сверстниц – 700 г. Живая масса телок в 18 мес составляет 424 кг, черно-пестрых – 405 кг, что позволяет осеменить телочек породы Сибирячка на 24 дня раньше. Средний выход телят за 3 года по новой породе составил 82,7%, у исходной он был NEW BREED OF DAIRY CATTLE SIBIRYACHKA. Young animals of the new breed are intensively growing and developing. At all ages, their live weight is higher than Black-and-White peers. The average daily increase from birth to one year for heifers of the new breed was 770 g, for Black-and-White peers – 700 g. The average yield of calves over 3 years in the new breed was 82.7%, in the original one it was
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