Abstract
The objective was to compare the quality of cryopreserved goat semen with soy lecithin or egg yolk. The semen was collected from male goats (n=4), two commercial diluents AndroMed® (1% soy lecithin, SL); Optidyl (20% (v/v) Tris-egg yolk; TY), and a citrate-egg yolk-based diluent (CY) were used in fresh semen (FS) and then cooled from 37 to 4 °C for 2 h (refrigerated semen, RS), afterwards straws were filled with semen and frozen in liquid nitrogen at -196 °C (FS). There were no differences (p>0.05) between diluents in the FS in the mass motility (MM; 4.7±0.26), sperm viability (SV; 74.1±1.66) and individual motility (MI; 62.3±4.0). In the same sense, for the RS there was no difference (p>0.05) between diluents with respect to MM (3.83±0.4) and MI (52.1±6.0), however, the SV varied (p<0.05) according to the diluent, observing the lowest viability in SL vs CY and TY (51.0±13.0 vs 71.3±3.0 and 69.0±3.1). Regarding FS the MM, MI and SV obtained better values (p<0.05) with the diluent TY vs SL and CY (2.4±0.5, 32.5±8.3, 41.3±13.0). The results showed a better cryopreservation of goat semen with the diluent Tris-yolk compared to that of soy lecithin.
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