Cambios de la motilidad en la prueba de termorresistencia empleando diferentes diluyentes para la criopreservación de semen porcino

A one-way analysis of variance was employed to examine spermatozoa motility during the thermoresistance test after cryopreservation of 10 ejaculates from a Pietrain x Yorkshire boar of two years old. There were four extenders: Westendorf modified, Thilmant, trehalose plus glycerol and trehalose without glycerol. Changes in spermatozoa motility were evaluated during the thermoresistance test in thawed semen after 15 days of conservation. The straws were thawed at 56°C during 12 seconds and thereafter measurements were conducted every 15 min during two hours at 37°C. Ten straws per ejaculate were analyzed in every treatment. Mean values for motility found in fresh and thawed pig semen were 87.5 and 26.35% in this order (P0.05) effect among treatments for spermatozoa motility at the different times of the thermoresistance test, with similar values in all treatment except for the extender of glycerol without trehalose, which determined values significantly (P0.05) entre los tratamientos para la motilidad espermática en los distintos tiempos de la prueba de termorresistencia, manifestándose valores similares entre tratamientos excepto con el diluyente de trehalosa sin glicerol, que determinó resultados significativamente (P