Cryopreserving turkey semen in straws and nitrogen vapour using DMSO or DMA: effects of cryoprotectant concentration, freezing rate and thawing rate on post-thaw semen quality
| Autor: | Marsia Miranda, Angelo Manchisi, Nicolaia Iaffaldano, M. Di Iorio, Silvia Cerolini, Luisa Zaniboni |
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| Rok vydání: | 2016 |
| Předmět: |
Male
Turkeys endocrine system Cryoprotectant Nitrogen Semen Semen analysis Cryopreservation law.invention 03 medical and health sciences Semen quality Cryoprotective Agents 0302 clinical medicine law Acetamides Freezing medicine Animals Dimethyl Sulfoxide Sperm motility Silage 030219 obstetrics & reproductive medicine Chromatography Dose-Response Relationship Drug medicine.diagnostic_test urogenital system Chemistry Extender 0402 animal and dairy science 04 agricultural and veterinary sciences General Medicine 040201 dairy & animal science Sperm Semen Analysis Animal Science and Zoology Semen Preservation Food Science |
| Zdroj: | British Poultry Science. 57:264-270 |
| ISSN: | 1466-1799 0007-1668 |
| Popis: | 1. This study was designed to identify a suitable protocol for freezing turkey semen in straws exposed to nitrogen vapour by examining the effects of dimethylacetamide (DMA) or dimethylsulfoxide (DMSO) as cryoprotectant (CPA), CPA concentration, freezing rate and thawing rate on in vitro post-thaw semen quality. 2. Pooled semen samples were diluted 1:1 (v:v) with a freezing extender composed of Tselutin diluent containing DMA or DMSO to give final concentrations of 8% or 18% DMA and 4% or 10% DMSO. The semen was packaged in 0.25 ml plastic straws and frozen at different heights above the liquid nitrogen (LN2) surface (1, 5 and 10 cm) for 10 min. Semen samples were thawed at 4°C for 5 min or at 50°C for 10 s. After thawing, sperm motility, viability and osmotic tolerance were determined. 3. Cryosurvival of turkey sperm was affected by DMSO concentration. Freezing rate affected the motility of sperm cryopreserved using both CPAs, while thawing rates showed an effect on the motility of sperm cryopreserved using DMA and on the viability of sperm cryopreserved using DMSO. Significant interactions between freezing rate × thawing rate on sperm viability in the DMA protocol were found. 4. The most effective freezing protocol was the use of 18% DMA or 10% DMSO with freezing 10 cm above the LN2 surface and a thawing temperature of 50°C. An efficient protocol for turkey semen would improve prospects for sperm cryobanks and the commercial use of frozen turkey semen. |
| Databáze: | OpenAIRE |
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