Influence of inbreeding degree on the milk yield efficiency
O. V. Gorelik,
M. B. Rebezov,
N. M. Kostomakhin,
S. Yu. Kharlap,
A. A. Belookov,
O. V. Belookova,
N. I. Kulmakova https://doi.org/10.32634/0869-8155-2022-363-10-69-76
Abstract
The Ural type of the domestic Black-and-White mottled breed of cattle features high rates of milk productivity, good suitability for industrial milking technology, but the productive longevity is 2.4–2.6 lactations only, although in the herds there are livestock of cows with a productive longevity up to 10 lactations. The decline in productive longevity is associated with deterioration of reproductive qualities of the cows. In result of the research it was found that the most resistant to long-term use in conditions of dairy complexes for industrial milk production in pedigree reproducing farms were the cows of the Siling Trajun Rokita line. Their productive period was 4.0 lactations. In other lines, the productive longevity ranged from 1.8 (Pabst Governor’s line) to 2.5 (Montvik Chieftain’s line) lactations. A low fertility rate (less than 0.95) indicates the presence of reproduction problems in the herd. The modern Holsteinized black-and-white mottled cattle, bred in Sverdlovsk region, possess high breeding qualities. The potential of their use is quite high and, despite certain problems with reproduction system, they can produce for a long time in the environmental and forage conditions of the breeding zone.
About the Authors
O. V. Gorelik
Ural State Agrarian University;
Ural Federal Agrarian Research Center of the Ural Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Doctor of Agricultural Sciences, Professor, 42 Karl Liebknecht, str., Yekaterinburg, 620075;
112a Belinsky str., Yekaterinburg, 620142
M. B. Rebezov
Ural State Agrarian University;
Federal Scientific Center of Food Systems named after V.M. Gorbatov of the Russian
Academy of Sciences
Russian Federation
Russian Federation
Doctor of Agricultural Sciences, Professor, 42 Karl Liebknecht, str., Yekaterinburg,
620075;
26 Talalikhin, str., Moscow, 109316
N. M. Kostomakhin
Russian State Agrarian University — Moscow Agricultural Academy named after K.A. Timiryazev
Russian Federation
Russian Federation
doctor of biological sciences, professor,
49 Timiryazevskaya str., Moscow, 127550
S. Yu. Kharlap
Ural State Agrarian University
Russian Federation
Russian Federation
candidate of Biological Sciences, Associate Professor,
42 Karl Liebknecht str., Yekaterinburg, 620075
A. A. Belookov
South Ural State Agrarian University
Russian Federation
Russian Federation
Doctor of Agricultural Sciences, Associate Professor,
13 Gagarin str., Troitsk, 457103, Chelyabinsk region
O. V. Belookova
South Ural State Agrarian University
Russian Federation
Russian Federation
candidate of Agricultural Sciences, Associate Professor,
13 Gagarin str., Troitsk, 457103, Chelyabinsk region
N. I. Kulmakova
Russian State Agrarian University — Moscow Agricultural Academy named after K.A. Timiryazev
Russian Federation
Russian Federation
Doctor of Agricultural Sciences, Associate Professor,
49 Timiryazevskaya str., Moscow, 127550
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Review
For citations:
Gorelik O.V., Rebezov M.B., Kostomakhin N.M., Kharlap S.Yu., Belookov A.A., Belookova O.V., Kulmakova N.I. Influence of inbreeding degree on the milk yield efficiency. Agrarian science. 2022;(10):69-76. (In Russ.) https://doi.org/10.32634/0869-8155-2022-363-10-69-76
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