INFLUENCE OF GENETIC AND NON-GENETIC FACTORS ON SEMEN CHARACTERISTICS OF MALABARI BUCKS
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Date
2019-12
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Abstract
Data on 675 ejaculates collected from four Malabari bucks spread over six years were utilized to assess
the influence of genetic and non-genetic factors on semen quality traits. The overall least-squares means
for semen volume, mass activity, initial sperm motility, pre-freeze motility, post-thaw motility and number
of frozen semen doses per ejaculate were 0.81 ± 0.01 ml, 4.80 ± 0.02, 79.60 ± 0.00 per cent, 76.31 ± 0.00
per cent, 35.16 ± 0.00 per cent and 27.16 ± 0.59 doses respectively. The genetic and non-genetic factors
had significant influence (p<0.05) on pre-freeze and post-thaw motility, while season and buck had highly
significant influences (p<0.01) on semen volume, initial sperm motility and number of doses per ejaculate.
Bucks had highly significant influence (p<0.01) on mass activity. Winter season had highest semen volume,
post-thaw motility and number of doses per ejaculate, whereas initial sperm motility and pre-freeze motility
were higher in summer and south-west monsoon seasons respectively. The second ejaculate had higher prefreeze
and post-thaw motility than the first ejaculate. Buck No. 3 was found to be best among the bucks in
terms of mass activity, initial sperm motility, post-thaw motility and number of doses per ejaculate.
Description
TNV_35thVCRI_CA_Dec-2019_SRSO-1
Keywords
Veterinary Science