The morphological characteristics of frozen bull sperm of different breeds the Bank of genetic resources the long-term storage in liquid nitrogen were studied. A significant difference between the indicators of pathological and dead forms of bull semen wi

Abstract

The morphological characteristics of frozen bull sperm of different breeds the Bank of genetic resources the long-term storage in liquid nitrogen were studied. A significant difference between the indicators of pathological and dead forms of bull semen with different terms of storage was set. The result studies, by the terms of storage 10-45 years, in bulls of dairy breeds were observed above normal ​​of pathological forms of sperm in an average of 2,5 %, except for sperm Ukrainian Black Pied dairy breed. In semen bulls of Simmental and beef breeds above an average of 5 %.