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本实验旨在探讨添加低剂量大豆卵磷脂稀释液对绵羊精液低温保存效果。实验一采用6个浓度(0%、0.25%、0.5%、0.75%、1.0%、1.25%)大豆卵磷脂替代TRIS专利稀释液中卵黄低温保存绵羊精液,在第0、1、4、7、10、12、18天检测精子活率、顶体完整率;实验二选用实验一中最优添加组(0.5%组)和TRIS专利稀释液制成粉剂低温保存绵羊精液,在保存第0、1、4、7、10、12天对精子活率和顶体完整率进行测定,并在保存第10天对绵羊进行人工授精。结果表明:实验一中,0%组从第1天精子活率低于其他组(P<0.05),0.25%组精子活率观测值从第10天开始低于0.25%以上浓度组(P<0.05),0.5%、0.75%、1.0%、1.25%组保存第10天精子活率均大于50%,0.5%组保存第18天精子活率高于1.0%、1.25%组(P<0.05);各组顶体完整率缓慢下降,各时间点均无显著性差异;实验二中,0.5%组与TRIS组在各时间点的精子活率、顶体完整率与受胎率均无显著性差异,保存第10天精子活率均高于50%;0.5%组受胎率为65.49%,略低于TRIS组67.65%(P>0.05)。本实验条件下,绵羊精液低温保存稀释液中添加0.5%大豆卵磷脂替代卵黄效果最佳。 相似文献
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[目的]研究注射口蹄疫疫苗对种公牛精液品质的影响。[方法]随机选择6头种公牛,并采其精液进行检测,用比较方法研究。[结果]注射双价灭活疫苗前精液量6.8ml,鲜精活率70%,精液密度17.3亿/mL,冻后活率39.7%冻精数414.8剂,精子畸形率14.2%。注射双价疫苗之后精液量4.3 mL,鲜精活率6.5%,精液密度12.7亿/mL,冻后活率34.8%冻精数162.3剂,精子畸形率18%。[结论]注射疫苗后,种公牛的精液品质也随之下降,精液量、精子密度和原精活率注射后较注射前极显著降低,认为注射口蹄疫疫苗对种公牛的精液品质产生较大影响。 相似文献
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《黑龙江畜牧兽医》2014,(1)
为了检测冷冻对绵羊精子琥珀酸脱氢酶(SDH)的影响,探索其与精子活率的关系,试验采用试管法对冷冻前后小尾寒羊精子SDH的活性进行研究。结果表明:冷冻后精子活率[(38.80±4.15)%]及精子SDH阳性反应率[(32.80±4.32)%]与冷冻前精子活率[(81.20±2.17)%]和精子SDH阳性反应率[(72.20±4.02)%]相比极显著降低(P0.01),冷冻前后精子活率与精子SDH阳性反应率分别呈显著正相关和极显著正相关(P0.05和P0.01)。说明冷冻保存对绵羊精子SDH活性造成显著损伤;精子活率与SDH阳性反应率之间的显著相关性证实了精子SDH的活性与精子生命活动密切相关,其活性可以在一定程度上预测精子活率和受精能力,并可作为评价绵羊冻融精液品质的新指标。 相似文献
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不同季节和气候条件对种公牛精液品质的影响的研究 总被引：1，自引：0，他引：1
[目的]研究不同季节气候条件对种公牛精液品质的影响。[方法]从采精种公牛中随机抽出5头,选取气温最高（7月份）最低（1月份）和适中温度（4,9月份）进行试验,分别对不同时期所采得的精液进行检测。[结果]在最高温度月份7月份（25℃）时5头种公牛的平均精液量为5.88mL,原精活率67.2%,精液密度16.64亿/mL,冻后活率33.8%,生产冻精数143.4剂,精子畸形率23%。1月份环境温度平均在-11.2℃时,5头种公牛的精液量平均为5.7mL,原精活率66.8%,精液密度13.3亿/mL,冻后活率37.4%,生产冻精数为275.8剂,精子畸形率17.8%。在4,9月份环境温度12℃时精液量为6.6mL,原精活率73.2%,精液密度16.92亿/mL,冻后活率41.8%,生产冻精数404.4剂,精子畸形率12.6%。精液量之间差异显著（P〈0.05）,原精活率之间差异显著（P〈0.05）,精子畸形率之间差异显著（P〈0.05）。冻后活率和冻精生产数差异不显著。[结论]环境温度过高或者过低都会影响精液品质,种公牛在适宜的温度下生产的精液品质也会更加优良,种公牛在温度较高的条件下生产精液品质比在低温条件下还要差,种公牛最适宜的生产温度为12℃～16℃。 相似文献
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微生态活菌制剂防治初生羔羊腹泻的效果 总被引：1，自引：0，他引：1
李晓卉 《青海畜牧兽医杂志》2008,38(3):9-10
应用微生态活菌制剂对初生羔羊腹泻进行防治试验,结果试验组腹泻率为5.5%,成活率为94.2%,腹泻率比抗生素对照组降低5.5%,成活率提高7.2%;应用微生态活菌制剂对腹泻羔羊进行治疗,治愈率为94.4%. 相似文献
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本试验以Tris-葡萄糖稀释液为基础稀释液,就卵黄(20%、25%、30%)和十二烷基硫酸钠(SDS)的添加量(0.725 mg/ml、1.000 mg/ml、1.500 mg/ml)对犬精子冻后活率的影响进行了研究.试验结果表明,(1)20%的卵黄添加量组犬精子的冻后活率最高.25%卵黄添加量组和30%卵黄添加量组比较则没有明显差异(F﹤F0.05).(2)添加SDS与对照组比较,添加SDS组的精子冻后活率都较高.三种SDS添加量中,1.000 mg/ml的添加量效果最好,冻后精子活率极显著(F﹥F0.01)或显著(F﹥F0.05)高于添加量为0.725 mg/ml和1.500 mg/ml时的冻后精子活率. 相似文献
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采集上海水牛成年公牛精液进行冷冻保存,从而抢救性保护该品种。测定结果表明:上海水牛原精活率平均高于50%,活力平均高于45%;冻精解冻后精子活率平均高于45%,活力均高于40%。 相似文献
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《家畜生态学报》2021,42(7)
试验以精子冻后活率、质膜完整率和顶体完整率三项指标评价了一步稀释法(Ⅰ组)和两步稀释法(Ⅱ组),以及不同保存温度和时间对解冻、稀释后的猪精液质量的影响。结果表明,采用两步稀释法对解冻后的猪细管冻精进行稀释,精子活率、质膜完整率和顶体完整率分别达到82.6%、89.4%和90.3%,极显著高于一步稀释法(P0.01)。用两步法稀释后的精液36℃保存5 min、10 min和15 min时精子活率分别为81.2%、80.8%和80.9%(P0.05),40 min时为50.1%;精子质膜完整率和顶体完整率未见显著下降(P0.05);17℃保存15 h时精子活率、质膜完整率和顶体完整率分别为81.1%、88.9%和91.4%(P0.05);60 h时分别为50.4%、61.4%和61.6%,均极显著低于初始的各项指标(P0.01)。 相似文献
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探讨程序化冷冻与玻璃化冷冻对小鼠GV期卵母细胞及二细胞期胚胎的复苏率及其发育潜能的影响。通过小鼠的卵母细胞与早期胚胎的不同冷冻方法的比较,为后续阿旺绵羊的胚胎冷冻保存提供参考。采用程序化冷冻与玻璃化冷冻技术,分别冷冻小鼠GV期卵母细胞及二细胞期胚胎,复苏后培养,比较不同冷冻处理后的复苏率、成熟率与囊胚率。小鼠GV期卵母细胞程序化冷冻复苏率(48.00%±5.29%)显著低于玻璃化冷冻复苏率(65.00%±5.00%),有统计学差异(P=0.0147<0.05);而程序化冷冻后复苏卵母细胞的发育成熟率略高于玻璃化冷冻组,但无统计学意义。小鼠二细胞期胚胎程序化冷冻组复苏率(76.00%±2.00%)显著高于玻璃化冷冻组复苏率(70.00%±2.00%),有统计学差异(P=0.0213<0.05);冷冻后复苏胚胎发育的囊胚率程序化冷冻略低于玻璃化冷冻及对照组,但无统计学意义。 相似文献
12.
Abigail A. Igbokwe Oluwaseun S. Iyasere Richard A. Sobayo Seyifunmi Iyasere Rukayat I. Animashaun Fatimoh A. Balogun Zainab O. Aganran Morakinyo O. Fasola Afeez D. Adedokun Olawale A. Lakehinde Sodiq O. Lasisi Muhammad R. Suleiman Jamiu D. Iyiola James O. Daramola 《Reproduction in domestic animals》2019,54(3):551-559
Comparative effect of slow and rapid freezing on sperm functional attributes and oxidative stress parameters of goat spermatozoa cryopreserved with tiger nut milk (TNM) extender was examined in this study. Pooled semen samples obtained from West African Dwarf (WAD) goat bucks were diluted with Tris‐based extenders containing different levels of TNM (0, 5, 10, 15 and 20 ml/100 ml extender). The diluted semen samples were subjected to slow and rapid freezing for a period of 7 days and thereafter evaluated for sperm functional attributes (percentage motility, acrosome integrity, membrane integrity, abnormality and livability) and oxidative stress (malondialdehyde [MDA] concentration and acrosin activity) parameters. Results showed that higher (p < 0.05) motility, livability, membrane and acrosome integrities in semen cryopreserved with slow freezing compared to rapid freezing. These parameters (motility, livability and membrane integrity) were higher (p < 0.05) in semen cryopreserved with 15% TNM in both slow and rapid freezing protocols. The results revealed that semen cryopreserved in slow freezing had lower (p < 0.05) abnormality compared to rapid freezing. Acrosin activity was higher in slow freezing compared to rapid freezing. Acrosin activity was higher at 15% TNM in both slow and rapid freezing. Lower (p < 0.05) MDA concentration was observed in semen cryopreserved using slow freezing compared to rapid freezing. The findings revealed improved post‐thaw sperm functional attributes and oxidative stress parameters of WAD goat spermatozoa cryopreserved with 15% TNM using slow freezing. 相似文献
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Simple prediction of the survival of follicles in cryopreserved human ovarian tissue 总被引：2，自引：0，他引：2
Maltaris T Dragonas C Hoffmann I Mueller A Beckmann MW Dittrich R 《The Journal of reproduction and development》2006,52(4):577-582
This study examines the possible predictive value of the LIVE/DEAD fluorescence viability assay for evaluation of survival of cryopreserved human ovarian tissue. Ovarian tissue from ten patients was examined by LIVE/DEAD viability staining before and after cryopreservation and after freezing in a -20 C freezer (negative control). After cryopreservation with a slow freezing protocol and cryoprotectant the LIVE/DEAD assay showed 86% viable follicles (an intact oocyte and at least more than 50% of the granulosa cells alive), whereas after freezing at -20 C the survival rate was 67%. The healthy follicular loss after cryopreservation was 4%, whereas with freezing at -20 C, it was 25%. Although this assay overestimates the survival rate of cryopreserved primordial follicles, if the LIVE/DEAD assay yields greater than approximately 85% viable follicles, it can be assumed that the follicles in the cryopreserved tissue have maintained their developmental potential and that the tissue is suitable for retransplantation. 相似文献
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选取奶牛体内生产胚胎93枚(其中囊胚54枚,桑椹胚39枚),比较研究了不同冷冻方法和保护剂对其的保护效果。结果表明:乙二醇处理组对奶牛囊胚的保护效果优于One-Step-Freezing组、甘油组和玻璃化组(回收率、形体正常率和继续发育率四组分别为91.0%、82.0%、66.6%;91.0%、91.0%、88.8%;86.6%、85.0%、83.3%和80.0%、66.7%、50.0%),其中继续发育率在乙二醇组、甘油组和玻璃化组间差异显著(P<0.05);而桑椹胚的各项指标以乙二醇处理组最高,玻璃化组最低,但各组间差异不显著。结果说明乙二醇处理组对胚胎的保护效果优于其它几个处理组。 相似文献
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de Paz P Alvarez-Rodriguez M Nicolas M Alvarez M Chamorro C Borragán S Martinez-Pastor F Anel L 《Reproduction in domestic animals》2012,47(1):105-112
In order to establish a semen bank for the endangered Cantabrian brown bear, we tested five glycerol concentrations and three freezing rates for electroejaculated semen. Electroejaculation was performed on nine males. Semen was diluted in TES-Tris-Fructose (20% egg yolk, 2% EDTA, 1% Equex) with 2%, 4%, 6%, 8% or 10% glycerol and frozen at -10, -20 or -40°C/min. Before and after cryopreservation, samples were analysed for motility (CASA), viability and acrosomal status (flow cytometry). Pre-freezing results showed that glycerol concentration had no significant effect on total motility or progressive motility, but it significantly decreased VCL, ALH, viability and acrosomal status (p < 0.05). After thawing, sperm motility was higher at extender with 4%, 6% and 8% glycerol, but only at 4% and 6% glycerol for viability and acrosomal status. For 4% and 6% glycerol, freezing rates did not have significant effects. The curve fitting gave an estimate of the optimal glycerol concentration, with all the optimal values for every parameter between 6% and 7% glycerol falling. We propose using 6% glycerol and a freezing velocity of -20°C/min for freezing brown bear ejaculated spermatozoa. 相似文献
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The extenders and freezing rates from three different freezing protocols were combined and compared to each other in order to study the post-thawing acrosome integrity and fertility of frozen dog sperm. A commercial bovine TRIS-base extender (TRILADYL) and two self-made canine semen extenders (Norwegian and Dutch) were combined with a conventional bovine and two canine freezing regimes, and acrosome integrity of frozen/thawed spermatozoa was assessed by fluorescein isothiocyanate conjugated peanut agglutinin staining (FITC-PNA). Differences between freezing/thawing protocols were reflected in the proportion of cells with acrosomal damage and not based on motility results. It was concluded that during dog semen cryopreservation extenders had less influence on the post-thawing sperm quality than did the freezing rates. The optimal extender/freezing rate combination (TRILADYL/Norwegian) was used in the clinical practice to evaluate the fertility of frozen sperm administered by intrauterine insemination using a surgical approach. The pregnancy rate was 57% (4/7), but the average litter size was low (2.8). This may have been due to the insufficient sperm numbers contained in an insemination dose and/or to the incorrect timing of artificial insemination (AI). The final conclusion is that the commercial bovine extender is useful for freezing dog semen, and the TRILADYL/Norwegian freezing protocol is recommended as the most advantageous combination for the freezing of canine semen in the clinical practice. 相似文献
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The stability of hog cholera virus through five freeze-thaw cycles in the presence and absence of dimethyl sulfoxide was studied. In the absence of dimethyl sulfoxide the hog cholera virus titer was reduced 52% to 91% following successive freezing and thawing cycles. However, when dimethyl sulfoxide was added to the viral suspension the virus titer appeared to remain the same after the same number of freezing and thawing cycles. 相似文献
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北极狐、乌苏里貉精液细管冷冻技术研究 总被引：1，自引：0，他引：1
为了对濒危珍稀动物种质资源的进行保护,完善精液冷冻技术方案,对北极狐37只次、乌苏里貉32只次的精液进行细管冷冻技术研究,结果表明,北极狐精液用3%柠檬酸三钠—卵黄—甘油作冷冻稀释液,乌苏里貉精液用11%蔗糖—卵黄—甘油作冷冻稀释液,在5℃冰箱内平衡1 h后,进行细管冷冻(液氮-196℃),冻溶粒子活力达4~5级。速冻法优于缓冻法。细管冻精在50℃温水中快速溶化,北极狐精液用3%柠檬酸三钠作解冻液,乌苏里貉精液用7%葡萄糖液作解冻液效果较佳。 相似文献
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The objective of this study was to investigate the effects of beta‐mercaptoethanol (β‐ME) on post‐thaw embryo developmental competence and implantation rate of mouse pronuclear (PN) embryos that were cryopreserved after slow freezing, solid surface vitrification (SSV) or open‐pulled straw (OPS) vitrification methods. Mouse PN embryos were cryopreserved by using slow freezing, SSV and OPS methods. After cryopreservation, freeze–thawed PN embryos were cultured up to blastocyst stage in a defined medium supplemented without or with 50 μm β‐ME. The blastocyst formation rate of embryos that were cryopreserved by slow freezing method (40.0%) or vitrified by OPS method (18.3%) were lower than those vitrified by SSV method (55.6%) and fresh embryos (61.9%) in the absence of 50 β‐ME in the culture media (p < 0.05). The blastocyst formation rate of embryos that were cryopreserved by slow freezing method (53.1%) or by OPS method (41.9%) were lower than those vitrified by SSV method (79.5%) and that of fresh (85.7%) in the presence of β‐ME in the culture media (p < 0.05). The embryos transfer results revealed that the implantation rate of blastocyst derived from mouse PN embryos vitrified by SSV method (31.9% vs 51.2%) was similar to that of the control (39.0% vs 52.5%), but higher than those cryopreserved by slow freezing (28.2% vs 52.0%) and by OPS method (0.0% vs 51.2%) (p < 0.05). In conclusion, supplementation of β‐ME in an in vitro culture medium was shown to increase survival of embryo development and implantation rate of frozen–thawed mouse PN embryos after different cryopreservation protocols. 相似文献