Sperm production of bulls as an indicator of their adaptive ability

The purpose of the research was to study adaptive ability of Simmental and Holstein bulls imported to the breeding enterprise OJSC Krasnoyarskagroplem from Germany and Holland. The research objectives included the study of quantitative and qualitative indicators of sperm production and comparing them with the requirements of State Standard. The objects of the study were the Simmental bulls (n = 8), which came from Germany and the Holstein red-and-white imported from the Netherlands (n = 11) to the enterprise of OJSC Krasnoyarskagroplem in 2014-2015 and their sperm. Sperm production was evaluated in accordance with State Standard 23745-79 and 20909.3-75. The share of atypical forms of sperm was produced in smears of native sperm. The presence of anomalies of the heads, the neck and tail, teratological forms, immature forms were taken into account. The volume of ejaculate, the concentration of spermatozoa were determined, the whole seed was obtained, the drawbacks of native sperm. The studies were carried out in winter and spring at OJSC ’Krasnoyarskagroplem’ breeding enterprise in the sperm collection and assessment laboratory and the laboratory of the Department of Breeding, Genetics, Biology and Aquatic Biological Resources of FSBEI ’Krasnoyarsk State Agrarian University’. It was found that the bulls of both breeds possessed adaptive ecological valency and were able to exist in various environmental conditions, however, the producers of Simmental breed showed that they had more stable adaptive response mechanisms compared to Holstein selection bulls. The main share of atypical forms in the bulls of Holstein and Simmental breeds were the sperms with neck and tail anomalies in both winter and spring seasons 37.3 % and 14.3 and 40.1 and 18.1, respectively. Spring season negatively affected sperm quality, as the proportion of atypical forms in the semen of bulls of both breeds increased from 40.6 to 43.1 % in Holstein and from 16.1 to 21.1 % of Simmental producers. Holstein bulls passed adaptation successfully in 6 months, after entering the breeding enterprise.