Semen processability and freezability of Saanen fitb bucks under the climatic conditions of the Sudan

Abstract

Semen was” collected from six Saanen bucks using an artificial vagina. Collection was done at 
weekly intervals throughout the seasons of one year. The bucks were imported from bland and 
were allowed one year acclimatization period under the dry-arid climate of Khartoum. Three 
different types of diluents were used for processability and freezability of the semen. These were 
skimmed-milk diluent for short-term storage at +5 °C. The other two diluents were intended for 
deep freezing of semen in liquid nitrogen. Both diluents composed of the same constituents (tris
egg-yolk) but one was used for the one-step method of dilution and the other for the two-steps 
method of dilution. Percentage motility of spermatozoa that survived after freezability were not 
significant between the two methods. However, percentage motility of spermatozoa processed 
with milk was significantly high. For all types of diluent, the effect of season has shown that 
percentage motility of spermatozoa was lowest in Summer compared to Autumn and Winter