BREED INFLUENCE ON QUALITY OF FROZEN BULL SEMEN ASSESSED BY IN VITRO FERTILITY TESTS

Abstract

Four bulls each of four breeds (crossbred Holstein Friesian, crossbred Jersey, Vechur and Kasargod Dwarf) used for frozen semen production in Kerala Livestock Development Board were selected to evaluate the effect of breed on the quality of frozen semen. Semen samples of all the bulls (n=16) procured monthly for a period of ten months were subjected to in vitro quality assessment tests. Among the seven quality parameters studied, only progressive motility and cervical mucus penetration distance of post thaw spermatozoa were observed to be significantly (p<0.05) influenced by breed of the bull. There was no significant influence of breed on viability, abnormality, acrosome integrity, functional membrane integrity and induced acrosome reaction of frozen thawed spermatozoa. The results revealed the influence of breed of bull on selected quality parameters of frozen semen.

Keywords

• frozen bull semen
• breed
• in vitro fertility
• cervical mucus penetration distance
• in vitro capacitation