Тваринництво та технології харчових продуктів (Feb 2020)

EFFICIENCY OF REPRODUCTION OF DAIRY CATTLE WITH APPLICATION OF DIFFERENT BIOTECHNOLOGICAL METHODS Sergiy Ruban, Viktor Danshyn, A. A.Kyrii , T. V.Litvinenko

  • Sergiy Ruban,
  • Viktor Danshyn,
  • A. A.Kyrii,
  • T. V.Litvinenko

DOI
https://doi.org/10.31548/animal2020.01.077
Journal volume & issue
Vol. 11, no. 1
pp. 77 – 85

Abstract

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The use of biotechnological methods, especially the use of assisted reproducƟve technologies (ART), such as arƟficial inseminaƟon, mulƟple ovulaƟon and embryo transplantaƟon, is important in dairy caƩle breeding. The purpose of the research was to analyze the effecƟveness of the applicaƟon of four methods of ferƟlizaƟon of heifers and cows using tradiƟonal arƟficial inseminaƟon with cryopreserved semen (1-group), inseminaƟon with cryopreserved sexed semen (2-group), embryo transplantaƟon of fresh (3-group) and frozen (group 4)embryos. The experiment showed a tendency for a decrease in the number of inseminaƟons per concepƟon in groups of animals inseminated with sexed semen (1.2 inseminaƟon),transplantaƟon of fresh embryos (1.1 inseminaƟon) and frozen embryos (1.0 inseminaƟon) compared to using tradiƟonal arƟficial inseminaƟon with cryopreserved semen (1.3 inseminaƟon). Days open was the lowest in the groups where the embryo transplantaƟon was used (fresh embryos -118.0 days and cryopreserved embryos – 76.8 days, respecƟvely). A mulƟvariate linear model was used to evaluate the influence of major organized and geneƟc factors such as the season of the year, sire (the cow’s father), the reproducƟon method, the age at first ferƟle inseminaƟon and the milk yield in the first lactaƟon. All of these factors, except for milk yield in 305 days of lactaƟon, significantly influenced the number of inseminaƟons per concepƟon with the influence from 2.9 % (season of the year) to 8.9 % (age at inseminaƟon), while influence of the reproducƟon method was 3,7 %. As to days open, only the season of the year had a significant impact on this trait with an influence of 4.7 %. Thus, certain advantages of the method of tradiƟonal arƟficial inseminaƟon with cryopreserved semen and sexed semen were revealed. Applying the method of margin income, high efficiency of transplantaƟon of fresh embryos was noƟced, which made it possible to make a profit (under condiƟons of sale of heifers at a fixed price of 90 UAH per 1 kg of live weight). To cover the costs of frozen embryos transplantaƟon, the minimum price should be in the range of 120-150 UAH per kg of live weight of calf, or 67 th. UAH per head

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