COWS EMBRYO TRANSFER EFFICIENCY DEPENDING ON THEIR QUALITY, STAGE OF DEVELOPMENT AND SEASON OF THE YEAR
Abstract
In modern dairy and beef cattle breeding, embryo transfer allows for the accelerated breeding of animals with high productivity rates, which provides vast opportunities in breeding and reproduction of cattle to improve the efficiency of breeding work. This technology has been worked on for more than a decade, but still a number of technological and biological problems remain unsolved. The aim of our research was to study the effect of various paratypical factors on embryo survival rate. The work was carried out during 2019-2020 in JSC “Gastellovskoe”, Minsk district. Holstein lactating mature cows and heifers aged 11-12 months were used as donors. According to the results of the research, 249 pregnant recipients were identified out of 476 embryo transfers, which amounted to 52.3%. Embryo transfer in winter decreased the pregnancy rate by 11.0 p.p., 4.9 p.p. and 9.2 p.p. compared to spring, summer and fall, respectively. September was the most effective month, with a pregnancy rate of 73.9%.
About the Authors
L. V. Golubets
Scientific and Practical Center of the National Academy of Sciences of Belarus for Animal Breeding
Belarus
Belarus
Zhodino
Y. A. Yakubets
Grodno State Agrarian University
Belarus
Belarus
Grodno
A. S. Deshko
Grodno State Agrarian University
Belarus
Belarus
Grodno
E. L. Gaysenok
JSC “Gastellovskoe”
Belarus
Belarus
Senitsa agro-town
V. V. Kasnitsky
JSC “Gastellovskoe”
Belarus
Belarus
Senitsa agro-town
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Review
For citations:
Golubets L.V., Yakubets Y.A., Deshko A.S., Gaysenok E.L., Kasnitsky V.V. COWS EMBRYO TRANSFER EFFICIENCY DEPENDING ON THEIR QUALITY, STAGE OF DEVELOPMENT AND SEASON OF THE YEAR. Zootechnical Science of Belarus. 2024;59(1):39-46. (In Russ.)
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