Abstract
The research work was conducted at the Artificial Insemination (AI) Center under the Department of Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh to compare the efficacy between Egg Yolk Citrate (EYC) and Tris extenders for cryopreserved semen production in Black Bengal buck. The parameters of semen characteristics included percentage of individual motility (progressive), normal and live sperm and sperm concentration (billion/ml). Statistical analysis of fresh semen of individual buck effect was found to be significant (p<0.01) on normal sperm percentage but insignificant on individual motility, sperm concentration and live sperm percentage. After dilution with EYC extender, individual bucks had significant effect (p<0.05) on sperm motility and but insignificant on motility after cooling with and without glycerol. In the same way with Tris extender, it was insignificant (p>0.05) on diluted semen motility and motility after cooling with and without glycerol. Motility and morphology of the sperm after equilibration and thawing showed insignificant difference among the bucks using EYC extender. On the other hand, variation in the motility after equilibration and thawing was found significant (p<0.05) using Tris extender and insignificant on normal and live sperm percentages.
 Res. Agric., Livest. Fish.6(1): 119-125, April 2019
Highlights
Artificial Insemination (AI) is the choice of tool to disseminate superior genes from individuals free from specific diseases and thereby improving the production of offspring
A total of six adult Black Bengal bucks were selected from Nucleus breeding flock (NBF) based on body weight, libido, reaction time, scrotal circumference (SC), volume and their ability to produce semen having greater than 80% morphologically normal spermatozoa with satisfactory motility, live spermatozoa and concentration
The results revealed from statistical analysis that the motility after equilibration and live sperm percentages differed significantly (p
Summary
Artificial Insemination (AI) is the choice of tool to disseminate superior genes from individuals free from specific diseases and thereby improving the production of offspring. AI in goats has increased interest because only few bucks of good genetic merits are available for breeding (Herman et al, 1995). The widespread use of AI has allowed accurate genetic evaluation and rapid dissemination of genetic merit on a national and international basis to bring benefit to both breeders and consumers. Artificial insemination can be used to improve goat production through adoption of selective breeding. Same buck has been used generation after generation which has created greater chance of increasing inbreeding depression and lowering reproductive performances along with disseminating of various venereal and infectious diseases (Husain, 2007). Selective breeding is necessary for genetic improvement of goat and this requires controlled artificial insemination with known genetic merit
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