Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Improved Reproductive Efficiency in Gilts by Intrauterine Infusion of Killed Boar Semen before Breeding

  • Capitan, Severino S. (Animal and Dairy Sciences Cluster, College of Agriculture, University of the Philippines Los Banos College) ;
  • Penalba, F.F. (Animal and Dairy Sciences Cluster, College of Agriculture, University of the Philippines Los Banos College) ;
  • Geromo, F.B. (Department of Agricuture) ;
  • Dalumpienes, J.M. (TJEI Swine Farm)
  • Received : 2005.07.17
  • Accepted : 2005.11.04
  • Published : 2006.06.01
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Abstract

Two separate trials were conducted to determine the effects of uterine priming prior to first breeding and quantify any changes in the reproductive efficiency of gilts. In trial I twelve (12) gilts were randomly assigned to 3 treatments:T1:infusion of distilled water (control), T2: single infusion of killed semen (KS1), and T3: double infusion of killed semen (KS2). Each treatment had 4 breeding gilts which were bred by natural insemination (NI). In trial II, another set of 12 breeding gilts were randomly allotted to the same treatments and were subsequently bred by artificial insemination (AI). Infusions, through the use of AI catheters, were done during the $2^{nd}$ estrous cycle for T1 and T2, whereas infusions for T3 were made during the $1^{st}$ and $2^{nd}$ cycles. Regular breeding was subsequently made during the $3^{rd}$ estrous cycle. All gilts that returned to cycle were rebred within the 30-day period. In trial I (natural breeding), total piglets born was higher (p<0.05) in T2 (12.75 piglets) and T3 (11.75 piglets) than in the control (10.5 piglets). T3 obtained the highest (p<0.05) litter size (10.25 piglets) and heaviest litter weight (74.12 kg) at 28 days weaning, followed by T2 (9.80 piglets and 65.0 kg, respectively). The control yielded the lowest (p<0.05) litter size (7.50) and the lightest litter weight (47.00 kg) at weaning. For Trial II gilts (artificially inseminated), T3 gave higher (p<0.05) litter size born alive (10.88 piglets), total piglets born (11.72 piglets) and live litter weight at birth (15.30 kg) than those of T2 and the control. These results indicate that prebreeding intrauterine infusion of killed boar semen, either single or double, improved the reproductive performance of gilts.

Keywords

References

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