The quality of sexing-sorted bull sperm after in vitro capacitation

Abstract

Kaiin EM, Gunawan M. 2017. The quality of sexing-sorted bull sperm after in vitro capacitation. Pros Sem Nas Masy Biodiv Indon 3: 466-470. Sexing-sorted bull sperm separated with three column BSA (5-10%) was evaluated in vitro to determine the quality of sperm after capacitation. The frozen FH bull sexing-sorted X (female) and Y (male) sperms were re-thawed at water bath with a temperature of 37oC for 30 seconds. Then, the quality of sperms was evaluated in the parameters of motility, viability and abnormality. The state of sperm capacity was examined with triple staining at each sample, before and after capacitation. X and Y sperms were capacitated in two treatment media, i.e., TALP medium with 4 mM caffein (I), or 4 mM caffein combined with heparin 10 µg/ml (II). Unsorted sperm was used as a control. The research was conducted in five repetitions, by using X, Y, and unsorted sperms. The results showed that the motility of X dan Y sperms at the capacitation medium with caffein and heparin was significantly higher (X1=50.9%, X2=48.6%, and Y=51.5%) compared to the capacitation medium only with caffein (X1=41.5%; X2=43.9% and Y=41.3%). The same result was obtained from unsexed sperm. The viability of X dan Y sperm capacitated with medium II (X1=66.9%, X2=61,7%, and Y=60.3%), also resulted in a higher percentage compared to medium I (X1=54.8%, X2=50.6%, and Y=54.9%). The abnormality of X and Y sperms after capacitation at both treatment medium was not different significantly compared to unsorted sperm. Before capacitation, the percentages of X and Y sperms with acrosome reaction were lower (2.6% and 0.5%), but after capacitation, it resulted in increasing the number of sperms with acrosome reaction incapacitation, both on medium I and II. This result showed that sexing-sorted bull sperm with BSA column not resulting in the earlier acrosome reaction before capacitation.