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Objetive: The objective of this work was to assess the effect of bull breed on sperm quality after thawing semen. Design/methodology/approach: 10 plastic straws of 0.5 ml of frozen semen from three different breeds of bull were used, which were purchased from a commercial company. The bull breeds used were Charolais, Brahman and Simbrah. The straws were thawed at 37 ° C for 40 seconds. Immediately afterwards motility, viability and acrosmosomal integrity (NAR) were assessed. Results: The results were for motility 75.0, 87.5 and 85.0%; for viability 74.5, 74.5 and 72.5%; and for NAR 97.1, 96.9 and 96.9% for the Charolais, Brahaman and Simbrah races, respectively. Limitations/implications: The straws used were obtained from a commercial company dedicated to the sale of frozen bovine semen. Findings/conclusions: The three bull breeds showed good sperm quality after thawing, which can be recommended to be used in artificial insemination without any problem.
