FR 44. Evaluation of two freezing boar semen techniques. Preliminary results of a fertility trial

• V. C. Wevar ^[1] ; M. E. Torreta ^[1] ; O. Forchetti ^[1]
  1. [1] Universidad Nacional de Río Cuarto

     Universidad Nacional de Río Cuarto

     Argentina

     
• Localización: Archivos Latinoamericanos de Producción Animal, ISSN 1022-1301, ISSN-e 1022-1301, Vol. 5, Nº. Extra 3, 1997 (Ejemplar dedicado a: Proceedings XV ALPA meeting 2)
• Idioma: inglés
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• Resumen

  • The aim of this work is to compare the quality of boar semen frozen in maxistraws and pellets, and to evaluate the fertility through parturition rate.Rich sperm fraction from a two year fertile Hampshire boar was obtained by the gloved hand technique. Semen for freezing was required to have at least 70 % of motile spermatozoa and vigor 3 (1-5). Samples were processed and packed according the respective techniques of maxistraw and pellet. Both maxistraws (5ml) and pellets (100 pellets) insemination dose (6 x 109 spermatozoa) were diluted in BTS (Beltsville Thawing Solution, IMV, USA). Each of 21 white hybrid gilts were synchronised with 750 mg via IM of PMSG (Novormon, Syntex S. A.) and then inseminated twice, 12 and 24 h after standing reflex with a Melrose catheter. Group A (11) was inseminated with maxistraws, three of which farrowed 10, 9 and 4 piglets. Group B (10) was inseminated with pellets but no parturition occured. Thess non expected results are non satisfactory, so much efforts must be made for a better control of principal variables.