Evaluation of bulls based on semen quality and herd fertility
2004
Mostari, M.P. | Rahman, M.G.M. | Khandoker, M.A.M.Y. | Husain, S.S.,BangladeshAgricultural Univ., Mymensingh (Bangladesh). Dept. of Animal Breeding andGenetics
The data of the present study were collected from Bangladesh MilkProducers' Co-operative Union Limited (BMPCUL) at Baghabarighat, Sirajgong,Bangladesh to evaluate the bull performance through semen quality and 30-dayNon Return Rate (NRR). Data on 245 ejaculates and 12,750 services of almost sameaged of 5 Sahiwal bulls (B1, B2, B3, B4, and B5) over a period of 5 years werecollected from Animal Breeding Section and Cattle Feed Unit of BMPCUL. Thesignificant (p less than 0.01) individual sire effect was found on semen volume,three stages of sperm motility (initial, on dilution and post-thawing) and fertility.Significant (p greater than 0.05) variation was not found for pH. The highestvolume of semen per ejaculate, the initial, on dilution and post- thawing spermmotility were found in bull B, and representing 5.60 plus minus 0.19 mL, 73.56plus minus 0.61, 69.27 plus minus 0.33 and 63.90 plus minus 0.48%, respectively.The highest sperm motility was found in initial stage and then declined steadilyup to post-thawing stage. Significant (p less than 0.01) positive correlations wereobserved between the three stages of sperm motility and fertility. The results ofthe present study revealed that evaluation of breeding bulls on the basis ofsemen quality and herd fertility is important and provides the guideline of theway to sire selection for reproductive performance.
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