Bai YY, Xu X, Yu XJ, Guo J, Dong XX, Wang XY, Zhao ZA, Wang J. Skimmed Milk Diluent Promotes the Sperm Motility and Conception Rate of Dorper Sheep Compared to Vitamin B12 Diluent.
Cryo Letters 2020;
41:358-364. [PMID:
33990813]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
BACKGROUND
Dorper sheep is an ideal breed for improvement, with higher meat production and increased adaptability. Artificial insemination is an efficient technique for Dorper genetic improvement and reproduction management. However, there is no uniform diluent for Dorper semen dilution.
OBJECTIVE
To compare the effects of vitamin B12 (VB12) and skimmed milk diluents on sperm motility at different ratios and time points, and the effects on conception rate.
MATERIALS AND METHODS
We detected the effect of diluents on sperm density, deformity, motility and conception rate of Dorper sheep.
RESULTS
We found the optimal dilution ratio of skimmed milk is 1:3. Compared to VB12, skimmed milk at 1:3 ratio prolonged semen storage time (48 h vs. 18 h, storage at a low temperature of 4°C) and increased the survival index of sperm (44.7 ± 2.8 vs. 18.5 ± 0.6, P<0.01).
CONCLUSION
Skimmed milk is more effective, nutritious and convenient than vitamin B12, representing a more advantageous diluent.
Collapse