共查询到20条相似文献,搜索用时 296 毫秒
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冷冻保护剂对家畜精液冷冻保存的研究进展 总被引:3,自引:0,他引:3
家畜精液冷冻保存可以实现在不同时间、不同地点的人工授精,能有效提高优良种公畜的利用率,扩大其基因传播范围,同时也是家畜遗传资源易位保存的主要方法之一。在精液冷冻保存过程中,选择合适的稀释液成分对解冻后精子品质的影响十分重要。精子对低温非常敏感,在稀释液中加入冷冻保护剂可有效提升精子解冻后活力。文章综述了近几年渗透性冷冻保护剂(甘油、乙二醇、二甲基甲酰胺、二甲基乙酰胺、二甲基亚砜)和非渗透性冷冻保护剂(卵黄、大豆卵磷脂、蔗糖、脱脂乳)在猪、牛、羊、鸡、兔以及骆驼上的应用与研究,旨在为进一步深入研究家畜精子冻融损伤机制提供理论依据。 相似文献
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猪精液超低温冷冻保存研究进展 总被引:2,自引:0,他引:2
猪人工授精(AI)技术已经广泛应用于畜牧业生产,但精液来源基本是17℃保存的新鲜猪精液,不利于精液长期保存和猪种资源保存。超低温冷冻保存技术是猪精液长期保存最有效的方法,冷冻精液可以实现不同地区、不同国家优良种猪精液间的交流,从而大大提高猪种资源的利用率,但冷冻解冻后的精液质量较差,受胎率、窝产仔数远低于鲜精,极大地限制了猪精液冷冻保存技术的广泛应用。本文综述了猪精液冷冻保存研究概况、猪精液冷冻损伤机理和猪精液冷冻保存影响因素,以期为猪精液超低温冷冻保存研究提供新的思路和方法。 相似文献
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C. O. Bwanga 《Acta veterinaria Scandinavica》1991,32(4):431
The present review summarizes information concerning the methods available to cryopreserve boar semen, covering the historical background, cryobiology and cryoprotecting considerations, technological developments and recent advances in cryopreservation methodologies. Successful methods for cryopreservation of boar semen have not been achieved despite numerous efforts world wide. Improvements in semen preservation technologies have been deterred by lack of in vitro methods that can accurately predict in vivo fertilizing capacity of frozen boar semen. The cell membrane is of crucial importance with regard to freeze-thaw survival of spermatozoa. It is important to optimize the survival of the plasma membrane as this is a non homogenous entity both in structure and function. The boar sperm membrane exhibits extreme sensitivity to freezing treatment. Freezing and thawing results in considerable changes in electrolyte dynamics and damages have mainly been associated with alterations in the head membranes especially at thawing. To date fruitless efforts have been carried out to find a cryoprotectant for the spermatozoa membranes and glycerol still continues to be used despite its harmful effects to the membranes. 相似文献
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Camila R. C. de Brito Antonio Sergio Varela Junior Stela Mari M. Gheller Izani B. Acosta Andreia N. Anciuti Norton Luiz S. Gatti Edenara A. Silva Nathalia W. Knabah Carine D. Corcini 《Reproduction in domestic animals》2021,56(5):821-825
In semen cryopreservation, egg yolk is still widely used as a non-penetrating cryoprotectant. Much has been developed in the search for alternatives for this biological product. This work aimed to evaluate the processed egg yolk through ultracentrifugation and/or sonication in the cryopreservation of swine semen. Twenty-seven semen doses were purchased from a commercial boar stud and processed for cryopreservation using egg yolk lactose 11% (control) extender, processed using two different methods: high-speed centrifugation and sonication. Then, they were submitted to freeze-thawing protocol and were assessed for kinematic and cell structural parameters. Samples in which extenders underwent centrifugation had better results in velocity parameters, meanwhile those that only sonication was performed had poorest results in this parameter. The preservation of the membrane and mitochondria structure had better results when the diluent was only centrifuged in comparison with the other treatments. Therefore, centrifugation of extender containing egg yolk is important for better cryopreservation of swine semen. 相似文献
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国内犬精液冷冻保存技术起步较晚,尚处在研究探索阶段,犬精液冷冻保存技术还不成熟,冷冻精液受胎率、窝产仔数与自然交配相比还有一定的差距,而且品种、地域、采精时间的不同,精液冷冻效果也不一致。从犬精液的冷冻保存方法、冷冻保护剂、解冻方法三个方面,综述了近年来国内外的犬精液冷冻研究成果,为探索更加有效的犬精液冷冻技术,提高犬精液冷冻效果提供参考。 相似文献
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采用5% 二甲乙酰胺(DMA)(V/V)完全替代甘油,比较乳糖、海藻糖对精液冷冻保存效果的影响。结果表明,海藻糖显著提高了冷冻——解冻后精子成活力(49.32%±1.52%)与顶体完整性 (47.33%±1.16%)(P<0.05)。然后利用海藻糖替代乳糖,评价不同浓度的DMA对公猪精液冷冻保存的影响。结果表明,当DMA添加量为4%时,解冻后精子活率、成活力、顶体完整率分别为(45.17±0.56)%、(50.33±0.67)%、(48.30±1.44)%,均显著高于3% DMA、6% DMA添加组(P<0.05),精子活率显著高于5% DMA添加组(P<0.05),但精子成活力、顶体完整性与其差异不显著(P>0.05)。因此,当利用海藻糖作为冷冻保存基础稀释液,DMA最适添加量为4%。 相似文献