EFFECT LONG-TERM STORAGE OF CRYOPRESERVED BULL SEMEN IN LIQUID NITROGEN ON PARAMETERS OF QUALITY SPERM

Abstract

The study of performance straight-forward motility and absolute survival rate of thawed sperm bulls
of different breeds in long-term storage in the Bank of genetic resources. It is established positive high
correlation between the indicators of motility and an absolute survival rate of sperm (r=0,89) (p<0,001).
The studies found that the rates of sperm motility and survival of white-headed bull’s ukrainian, lebedinsky,
simmental and gray ukrainian breeds were higher than the current standard on average by 15 %.