l-cysteine prolonged fresh boar semen qualities, but not for docosahexaenoic acid

Panida Chanapiwat and Kampon Kaeoket
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Panida Chanapiwat: Semen Laboratory, Department of Clinical Sciences and Public Health, Faculty of Veterinary Science, Mahidol University, Salaya, Thailand

Czech Journal of Animal Science, 2021, vol. 66, issue 1, 21-28

Abstract: The present study aimed to develop a long-term fresh boar semen extender by adding l-cysteine and docosahexaenoic acid (DHA) into Beltsville thawing solution (BTS)-based extender. Semen samples were collected from six boars, diluted at a concentration of 3 × 109 spermatozoa/100 ml and allocated into 10 groups as follows: BTS, Merck III®, Androstar® Plus, ModenaTM, DHA 1.5 mg/ml, 3 mg/ml, and 6.25 mg/ml, l-cysteine 2.5 mM, 5.0 mM, and 10 mM. All extended semen samples were stored at 18 °C and were evaluated for progressive motility, viability, acrosome integrity, pH, and osmolality on days 0, 1, 3, 5, and 7 of storage. The results documented that on day 3, l-cysteine at 2.5 mM showed the significantly highest percentage (78.8%) of progressive motility, but not different from ModenaTM (78.8%) and Androstar® Plus (71.3%) (P < 0.05). On day 5, l-cysteine at 2.5 mM maintained progressive motility and viability up to 73.8% and 77.9%, respectively, but not different from ModenaTM (78.8% and 74.8%) and Androstar® Plus (70.0% and 76.8%) (P < 0.05). On day 7, superior progressive motility (71.3%, 77.5% and 72.5%) and viability (72.8%, 77.3% and 69.8%) were found for l-cysteine at 2.5 mM, ModenaTM and Androstar® Plus groups, respectively, when compared to the other groups (P < 0.01). However, in the present study, DHA supplementation failed to maintain fresh boar semen qualities during storage. In conclusion, adding l-cysteine at a concentration of 2.5 mM in a BTS-based extender is the optimal concentration for the preservation of fresh boar semen at 18 °C for seven days.

Keywords: antioxidant; artificial insemination; DHA; pig; semen extender; spermatozoa (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjs:v:66:y:2021:i:1:id:199-2020-cjas

DOI: 10.17221/199/2020-CJAS

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