EFECTO DE LA RAZA SOBRE LA PRODUCCIÓN Y CALIDAD ESPERMÁTICA DE VERRACOS ( SUSSCROFA DOMESTICUS ) EN LA FACULTAD DE CEINCIAS ZOOTÉCNICAS DEL CANTÓN CHONE-ECUADOR.

Abstract

The porcine species is one of the species that reaches the highest population increases due to the number of offspring per birth and births per year; thus having high productivity. The objective was to evaluate the effect of the breed on the production and sperm quality of boars (Sus scrofa domesticus) in the Faculty of Zootechnical Sciences of the Chone canton, Ecuador. To contribute to genetic improvement and provide livestock technical knowledge carried out in a sperm evaluation system for stallions used in swine reproduction. A completely randomized experimental design with a factorial treatment arrangement was used: four breeds of breeding pigs (Pietrain, Duroc, Belgian and Landrace) between 8 and 9 months, average weight 120 kg and two concentrations of semen (pure and diluted). In 500 mL glass containers and with a funnel covered with a sterile gauze filter (separate solid and liquid fraction), the seminal sample was collected, immediately transferred to the laboratory and placed in a water bath at 36 ºC. For the macroscopic evaluation of the semen, the volume, color, odor and pH were determined, and in the microscopic agglutination, motility and sperm motility. The microbiological content of the ejaculate was determined by counting the colonies present. Results of macroscopic quality showed a higher ejaculate in the Pietrain breed, however in the parameters temperature, color, odor and pH no statistical differences were found. In the microscopic parameters, the Duroc breed showed greater motility and sperm concentration. The bacteriological quality shows the absence of Escherichia coli on the ejaculate of the pigs. In conclusion, the breed did not show a greater incidence on the sperm quality of the boars, which allowed guaranteeing semen with high genetic and sanitary value.