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http://dx.doi.org/10.5713/ajas.20.0118

Ram semen preserved at 0℃ with soybean lecithin Tris-based extender substituted for egg yolk  

Zhao, Jian-qing (College of Life Sciences, Tarim University)
Xiao, Guo-liang (Kashgar Animal Husbandry Workstation)
Zhu, Wen-liang (Key Laboratory of Tarim Animal Husbandry Science and Technology, Xinjiang Production & Construction Corps)
Fang, Di (College of Life Sciences, Tarim University)
Li, Na (College of Life Sciences, Tarim University)
Han, Chun-mei (Key Laboratory of Tarim Animal Husbandry Science and Technology, Xinjiang Production & Construction Corps)
Gao, Qing-hua (College of Life Sciences, Tarim University)
Publication Information
Animal Bioscience / v.34, no.2, 2021 , pp. 192-197 More about this Journal
Abstract
Objective: The present study evaluated the preservation of ram semen at 0℃ using soybean lecithin with a Tris-fructose extender. Methods: Semen was collected by artificial vagina ejaculation from six rams with proven fertility. High quality ejaculates were diluted by soybean lecithin (0.25%, 0.5%, 0.75%, 1.0%, 1.25%) using Tris-fructose extender and control (Tris-fructose egg yolk extender), respectively. The ejaculates were diluted to a concentration of 5×108 sperm/mL, followed by cooling to 0℃ in 90 min and maintaining the temperature for 12 days. The diluted semen samples were examined and recorded for sperm progressive motility, acrosome integrity at 0, 24, 72, 144, 216, 288 h, respectively. Two hundred and twenty-three ewes were inseminated for 216 h with optimal soybean lecithin concentrated semen or control via trans-cervical insemination. Results: The results showed that there were no differences in sperm progressive motility at 0, 24, 72, and 144 h (p>0.05). After 216 h, the sperm progressive motility in the control group and 0.5% concentration groups was significantly higher when compared to 0.25% concentration (p<0.05). The 0.5% concentration group demonstrated the highest survival rate and had no difference with the control group (p>0.05). At 216 h, the sperm progressive motility of all groups was still above 50%. The acrosome integrity of all groups was decreased with prolongation of storage time, but there was no difference at each time point (p>0.05). There was no significant difference in the lambing rate and pregnancy rate between the 0.5% concentration group and the control group (p>0.05). Conclusion: These results suggest that ram sperm is capable of fertilization after preservation at 0℃ with 0.5% of soybean lecithin in Tris-based extender substituted for egg yolk and produce normal offspring after insemination.
Keywords
Ram; Semen; Diluent; Soy Lecithin; Egg Yolk;
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