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《中国草食动物科学》2016,(6)
为探索在传统稀释液配方中添加保护剂对藏羊精子的冷冻保存效果,在传统稀释液配方(果糖-蔗糖-柠檬酸钠-甘油)中,由Tris(三羟甲基氨基甲烷)代替柠檬酸钠,乙二醇代替甘油,在果糖-蔗糖-Tris-乙二醇基础上添加维生素B12、维生素E、维生素C、复合维生素B等,以增强精子缓冲力,减少毒性,提高精子活力、顶体完整率及受精力。结果表明:精液冷冻保存稀释液中添加Tris比添加柠檬酸钠有更好的冷冻保存效果,能有效改善冻后精子活力和顶体完整率;精液冷冻保存稀释液中添加维生素B12对精子有良好的保护作用;用等体积乙二醇代替甘油作为防冻剂,对精子冷冻时的保护作用不亚于甘油;藏羊细管冷冻精液的制作中,用果糖-蔗糖-Tris-乙二醇-维生素B12组合稀释液配方进行2次稀释,8 min冷冻,其冷冻效果最佳,顶体完整率最高。 相似文献
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为筛选陕北白绒山羊精液冷冻保存稀释液中最适的甘油及卵黄浓度,试验以三羟甲基氨基甲烷(Tris)6.057 0 g,蔗糖5.134 6 g,果糖1.500 0 g,柠檬酸钠3.318 6 g,青霉素10万IU,双蒸水200 m L配制成基础液,采用双因素正交试验研究不同浓度甘油、卵黄对精液冷冻保存的影响;采用一步稀释法冷冻保存陕北白绒山羊精液,复苏后检测活率、畸形率等确定精液冷冻稀释液最佳配方。结果表明:最佳冷冻稀释液配方为基础液80.5%+甘油6%+卵黄13.5%,精液冷冻、复苏后精子活率达到(37.2±0.5)%,精子畸形率为(11.2±0.5)%,质膜完整率为(64.2±0.5)%,均优于其他组,冷冻效果达到最佳,是保存山羊精液的冷冻稀释液最佳配方。 相似文献
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为探讨pH值和甘油对藏獒精液冷冻保存前后精子活力的影响,筛选6条种公藏獒在其繁殖季节(9~12月份)以不同pH值梯度(5.5,6.0,6.5,7.0,7.5)稀释液和不同甘油平衡时间(10,20,30,40,50,60,70,80,90 min)对藏獒精液进行冷冻,检查精子活力变化。结果表明,在藏獒精液冷冻过程中,pH值为6.5的稀释液中精子在冷冻前后有较高的活力;甘油平衡时间对藏獒精液活力有较大影响,冻前精子活力随甘油作用时间而下降,在甘油平衡时间为20 min所得藏獒冻后精子活力效果较好。 相似文献
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通过研究波尔山羊冷冻精液稀释液和稀释倍数,以筛选最佳稀释液配方、确定适宜的稀释倍数、提高波尔山羊精液冷冻效果。结果表明,4号稀释液解冻后精子活率高于1号、2号、3号稀释液解冻后精子的活率,差异极显著( P<0 .0 1 ) ;4号稀释液解冻后精子存活时间为61 .2 6h,长于1号、2号稀释液精子存活时间( P<0 .0 1 ) ,短于3号稀释液精子存活时间,但差异不显著( P>0 .0 5 ) ,说明4号稀释液冷冻效果最好。精液稀释3倍、4倍、5倍解冻后精子活率分别为0 .5 0 2、0 .5 0 1、0 .495 ( P>0 .0 5 ) ,均高于稀释6倍、7倍、8倍的精子活率( P<0 .0 1 ) ,表明波尔山羊冷冻精液稀释倍数以3～5倍为宜。 相似文献
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[目的]为了增加精液数量,提高种公牛的利用率,降低精液能量消耗,补充适当营养和保护物质的活动延长精子的寿命,有利于精子的冷冻和保存。[方法]冷冻精液稀释液的筛选采用正交设计方法并使用L9（3^4）正交表安排试验,优选出冷冻保存效果最佳的稀释液配方,再用较好的稀释液进行比较试验,得出最理想的冷冻稀释液。对要进行试验的稀释液,试验时先将同一头BMY牛精液分成九等分,依次标记为1-9号,然后在精液中分别加入等量的对应编号的冷冻稀释液,进行稀释冷冻效果的比较。[结果]B糖不同水平之间的差异极显著（P〈0.01）,B1与B3的差异极显著,与B2的差异不显著,B2与B3的差异不明显;最佳的组合是A2B1C1。添加不同种氨基酸和水平的稀释液BMY牛精液冻精解冻效果均无明显差异（P〉0.05）,添加不同氨基酸和水平的稀释液稀释BMY牛原精的效果亦无明显差异。 相似文献
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不同月龄巴杜公猪精液品质分析 总被引：1，自引：0，他引：1
《中国畜牧杂志》2019,(11)
为研究不同月龄巴杜种公猪的精液品质差异,本实验选择8～12、13～18、19～24、25～30、31～36月龄各6头巴杜种公猪,进行精液品质检查。结果表明:随着月龄增加,巴杜种公猪精液的各项指标呈现规律性变化,19～24月龄的采精量、精子密度和精子活率显著高于其他月龄段,且精子畸形率显著低于其他月龄段;24月龄之后采精量、精子密度和精子活率缓慢下降,而畸形率则逐渐上升。本研究结果可为合理选择配种日龄、人工授精公猪的使用年限及人工授精的输精量提供数据支撑,为巴杜种公猪精液的合理应用及提高猪场经济效益提供参考依据。 相似文献
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Sperm concentration and sperm membrane intactness (SMI) or viability are two measures of sperm quality that provide important but different information about a stallion's reproductive capability. Sperm concentration is a measure that, by itself, informs little about the reproductive status of either the stallion or the ejaculate. Nevertheless, it is part of the product, along with semen volume, that determines total sperm number. The correct calculation of total sperm number directly affects the number of mares a stallion can breed and therefore, fertility. If either sperm concentration or semen volume is incorrectly measured, both the number of mares that a stallion can breed and the fertility of those breedings are affected. Although considerable between-stallion variation exists, sperm concentration, semen volume and total sperm number tend to be seasonal and vary with ejaculation frequency. 相似文献
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本试验研究了亚硒酸钠维生素E对牛冷冻精液品质的影响。以常规Tris卵黄冷冻稀释液中分别添加2.5μL、5μL、7.5μL、10μL稀释后的亚硒酸钠维生素E(注射液)为试验组,以常规Tris卵黄冷冻稀释液为对照组,对解冻后的精液品质进行测定。结果显示添加5μL、7.5μL、10μL亚硒酸钠维生素E能够显著降低冷冻精液的精子畸形率,且10μL组顶体脱落的精子数量显著降低,精子顶体完整率上升。小剂量(<10μL)组改善了精子存活时间,使精子在体外37℃的存活时间延长至8.5h。 相似文献
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人工授精(AI)是第一代动物繁殖生物技术,最近几十年以来,研究人员已经探索出了许多评估冷冻-解冻后精液品质的新技术。由于精子质膜在低渗条件下的功能状态、离子分布及浓度和各种细胞器的功能都与冷冻解冻后精子的存活能力相关,冻精质量的评定也从最初的形态和主观活率分析,发展到更精确的染色质、质膜完整性及分解代谢活性的分子变化分析。但是,在实际应用当中,许多方法花费很大,况且单个的评估参数都与动物精子实际的受精力相关性不强。因此,要提高牛冻精质量的预言强度,应该将这些独立的参数结合起来,利用多元回归分析,建立一套更完美更精确的评估体系。 相似文献
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The objective of this study was to improve the quality of cryopreserved–thawed equine sperm using single-layer density centrifugation (SLC). Sperm quality was assessed by DNA integrity, motility, morphology, mitochondrial membrane potential, viability, and plasma membrane alteration. The percentage of DNA-damaged sperm (expressed in % COMP) was lower (P = .001) after SLC (1.6 ± 0.5% vs. 6.8 ± 0.5%). Total sperm motility (80 ± 2.4% vs. 41.7 ± 2.4%) and progressive sperm motility (69.5 ± 2.9% vs. 31.5 ± 2.9%) (P < .001), as well as the percentage of morphologically normal sperm (45 ± 3.9% vs. 27.7 ± 3.9%), increased after SLC compared with control sample. In addition, the proportion of sperm with high mitochondrial membrane potential increased (81.6 ± 1.8% vs. 42.1 ± 1.8%), as did the viability of sperm (71.1 ± 2.4% vs. 39.5 ± 2.4%), after SLC compared with the control sperm. The proportion of sperm with alteration in plasma membrane structure was lower after SLC compared with control sample (6.4 ± 1.1% vs. 18.9 ± 1.1%). Overall, sperm recovery was 72.7 ± 3.6% in the control sample compared with 14.8 ± 3.6% after SLC (P < .001). We conclude that based on the sperm parameters evaluated, SLC improves the quality of cryopreserved–thawed equine spermatozoa. 相似文献
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Allison M. Kiser Steven P. Brinsko Charles C. Love Dickson D. Varner Kendrick Sudderth Terry L. Blanchard 《Journal of Equine Veterinary Science》2014
This study evaluated measures of sperm quality in relation to fertility achieved with fresh semen or semen cooled and stored. Semen from 1 stallion was collected and processed to provide 3 treatments: group 1 received fresh semen; group 2 received cooled semen containing 50% seminal plasma (SP) stored for 4 days; and group 3 received cooled semen containing 50% SP stored for 1 day, then centrifuged and resuspended in fresh extender containing 10% SP on days 1 to 3. Inseminates were evaluated for sperm motion characteristics and the percentage of sperm with intact membranes (SMI). Mares (n = 34) in estrus were treated with an ovulation-inducing drug and inseminated with 100 million membrane-intact sperm on the following day. Pregnancy status was determined via transrectal ultrasonography 2 weeks after ovulation. The mean percentage of SMI was higher in group 1 (81%, initial) than in group 2 (74%, day 4) or group 3 (74%, day 4) (P < .05). The median percentages of total sperm motility differed among the groups (77%, 5%, 59% for groups 1, 2, and 3 respectively; P < .05). Median values for the percentages of progressively motile sperm and curvilinear velocity for group 1 (55%, 216 μm/s) and 3 (37%, 186 μm/s) were higher than for group 2 (1%, 73 μm/s) (P < .05). Pregnancy rates did not differ among groups (5 of 11, 45% in group 1; 5 of 11, 45% in group 2; and 7 of 12, 58%, in group 3; P = .77). These data suggest that, at least for this stallion, sperm membrane integrity may be a more valuable means of assessing potential fertility of cooled-stored semen than sperm motion characteristics. 相似文献
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用动物精子作为外源DNA载体已成为转基因的主要方法之一,并在多种动物上获得成功.最近,人们对外源DNA与精子结合的分子机理进行深入研究发现外源DNA可与精子膜上30～35 kDa蛋白质特异结合,结合强度受精子膜上MHCII因子的调节.精清中的IF-1因子能抑制精子结合外源DNA,从而维持物种的遗传稳定性.精子结合外源DNA的量是恒定的,部分DNA能进入精子核内,CD4蛋白具有转运外源DNA进入精子核内的功能.进入核内的外源DNA牢固结合在精子核骨架上,然后整合到染色体的特异位点.但是,精子与外源DNA结合后能激活精子内的核酸酶,进而使外源DNA分子降解,可能是导致这种转基因方法稳定性差的主要原因. 相似文献
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