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Freezing of donkey semen allows storing genetic material for an unlimited period of time, which can be used to generate germoplasm banks or for breeding of mules or asses. This research aimed to evaluate supplementation alternatives for freezing donkey semen. Semen from five Colombian creole donkeys (n= 10) was collected and then frozen in Equiplus® extender supplemented with 3% of glycerol (GLY) or 5% of dimethylformamide (DMF), 2% or 5% of centrifuged egg yolk (CEY) and 10% or 20% of seminal plasma (SP). Post-thaw evaluation of semen quality and lipid peroxidation (LP) was conducted. For statistical analysis mixed models were adjusted, regression analysis and comparison of means by the Tukey test were performed. Frozen semen with DMF, 5% CEY and 10% SP presented superior results of motility and membrane integrity (p<0.05). The LP was lower in extenders with 5% CEY (p<0.05). Supplementation of freezing extender with the combination of 5% DMF, 5% CEY and 10% SP allows to improve the post-thaw quality of asinine semen.

Efecto de la suplementación del diluyente sobre la calidad del semen de asno a la descongelación