共查询到20条相似文献，搜索用时 171 毫秒
1.
为探究山羊精液液态低温保存过程中添加不同稀释倍数“靓精”对保存效果的影响。实验以稀释液中未添加靓精为对照组,在稀释液中分别添加稀释50倍、100倍、200倍、400倍的靓精为实验组,经37℃孵育后持续检测精子活力、活率。结果表明,精液孵育后,与未添加靓精对照组相比,稀释液中添加靓精的实验组精子保存时间、活率及活力均得到提高,其中添加稀释200倍靓精组,精子保存时间最长,精子活率和活力均优于其他实验组。表明稀释液中添加靓精有助于延长山羊精子保存时间,提高精子质量。 相似文献
2.
<正>种公猪精液在采集、稀释液配制和精液稀释过程中,会因外界环境或操作疏忽而使精液或稀释液受到某些病原微生物的污染,影响稀释精液的质量和保存时间。"靓精"为一种精液净化保护剂,含5%聚维酮碘,能抑制或杀灭病原微生物,减少病原微生物对精子质量的影响,提高精子活力,延长保存时间。本试验在公猪精液中加入靓精,通过检测稀释精液在保存期间的精子活力和精子畸形率,观察靓精对稀释精液保存质量的影响。 相似文献
3.
《中国家禽》2017,(1)
精液稀释打击研究在种鸡场精液稀释、公鸡精液大批量镜检以及精液冷冻中有很好的应用前景。研究比较了不同稀释液、不同稀释比例与精液是否冷藏等条件下精液稀释后的活力,以及精液与稀释液不同添加顺序1∶1稀释后人工授精的受精率与孵化率。结果表明:1鸡精液在先冷藏再等温稀释的情况下,高倍稀释的鸡精子活力显著低于低倍稀释(P0.05),而在先等温稀释后冷藏的情况下,高倍稀释与低倍稀释的鸡精子活力差异不显著(P0.05);2在体温预热稀释液的前提下,先添加稀释液再采精、先采精再添加稀释液以及原精组,各组之间受精率与孵化率没有显著差异(P0.05)。因此,鸡精液稀释打击需根据具体情况而定,在采集后立即等温稀释的稀释打击最小,可用于鸡精液稀释、镜检与冷冻等研究领域。 相似文献
4.
《中国畜牧杂志》2015,(7)
为推广鸡精液稀释技术,对黑凤鸡精液稀释液pH值与渗透压进行优化。YHFB液的渗透压调整为340、294、261mOsm/kg,按1:2对原精稀释;pH值调整为7.38、7.29、7.11,按1:1对原精稀释;先添加精液与先添加稀释液,2种稀释顺序按1:2对原精稀释。稀释后的精液,置于6℃左右,定期检查精子活力。结果表明:用不同渗透压的稀释液稀释精液后立即测定的活力差异显著(P0.05),以261mOsm/kg组的活力最高,但24h及以后不同渗透压组的活力差异不显著;稀释后冷藏,3种不同pH值稀释液之间、稀释液与精液不同添加次序之间精子活力差异均不显著。因此,用YHFB稀释液对黑凤鸡精液进行稀释与冷藏,低渗透压(261mOsm/kg)较好,而pH值在7.1~7.4、精液与稀释液添加次序之间没有显著差异,能获得较好效果。 相似文献
5.
猪精液常温保存效果观察 总被引：1，自引：0，他引：1
为研究不同保存条件对猪精液常温保存效果的影响,观察精子的活力和有效保存时间之间的关系,采用常温下对精液添加抗生素、不同精液稀释比例、光照、振荡、混入尿液等,每隔12 h 显微镜检测一次精子活力的方法,以筛选常温下猪精液保存方式。结果显示,在精液保存过程中加入抗生素时,精液有效保存时间和精子活力明显高于未加抗菌药物的稀释液,其中加入庆大霉素的保存效果最好;精液稀释比例为1∶1～1∶2时保存效果最好;光照及剧烈振荡条件下,精液活力下降很快;混入尿液很容易使精子死亡。上述研究结果表明,常温下猪精液的理想保存方式是,在保证精子密度的前提下,精液与稀释液比例为1∶1～1∶2;同时在精液稀释液中添加广谱抗生素;保存过程中应避免光照、振荡、尿液污染等的影响。 相似文献
6.
7.
本文研究了3种稀释液在0～5℃下保存火鸡精液的效果及稀释液pH值、稀释比例和卵黄浓度对精子存活力的影响。原精及稀释精液Ⅰ、Ⅱ、Ⅲ不保存时,受精率分别为71.7％,64.03％,63.29％和63.77％(P<0.05);在0～5℃下保存48h后,原精完全丧失受精率(0％),而稀释精液Ⅰ、Ⅱ、Ⅲ的受精率分别为52.40％,45.30％和20.33％(P<0.01)。火鸡精液在0～5℃保存过程中,pH值降低,原精比稀释精液降低程度大。在本研究条件下,pH6.5和1:3稀释最适合于火鸡精子的存活,稀释液中添加5％或10％卵黄可提高火鸡精子的存活力。 相似文献
8.
9.
10.
为揭示17℃液态保存过程中猪精子质量和功能持续下降的机制，本试验采集9头在役的不同品种公猪（长白、大白和杜洛克）的精液48份，使用BTS溶液等体积稀释后分为3份，其中的两份分别使用反复冻融（方法 A）和低渗处理（方法 B）方法杀死精子并离心获得稀释液A和B，将另一份精液样品离心分离精浆（Seminal Plasma,SP）和精子。分别使用不同体积比例稀释液A:精子（1:1、4:1和19:1），稀释液B:精子（1:1、4:1和19:1）,SP:精子（1:1和4:1）和BTS:精子（4:1）重悬离心后的猪精子，以SP和BTS重悬的精液及原精液样品作为对照，所有精液样品于17℃下保存3 d。结果表明：随着保存时间的延长，所有稀释液和稀释倍数处理均损伤了精子活率和活力（P<0.01）及质膜完整性（P<0.05）。稀释液A比B引起的精子脂质过氧化水平更低（P<0.05）。5倍稀释精子，稀释液B的精子活力较BTS组降低（P<0.05），稀释液B引起的精子细胞内活性氧族（ROS）水平比稀释液A更高（P<0.05），而精液总抗氧化物（TAC）水平更低（P<0.05）... 相似文献
11.
12.
随着养牛业的高速发展,牛精液液体保存技术的研究也在逐步深入。人工授精技术降低了养殖成本,加速了肉牛的繁殖改良,同时还促进了育种工作的进程,合理有效的使用人工授精技术能够提高牛的饲养效益。与此同时,优良的种牛精液品质也是改良的关键,有实验结果表明：遗传、气候环境、饲养管理等因素会影响牛的精液品质[1],同时强制运动也是决定种牛精液品质的关键环节[2]。合理的精液冷冻与保存不仅能发挥优良的精液品质,同时也为人工授精技术的发展提供保障。本文从牛精液新型冷冻保护剂和损伤修复、牛精液冷冻保存添加剂、牛冷冻精在人工受精中的应用、冷冻保存的发展前景等方面总结了我国牛精液冷冻保存技术的研究和发展,以期对今后种牛精液冷冻和保存技术发展有所帮助、提供参考。 相似文献
13.
白藜芦醇对奶牛性控冻精品质和体外受精能力的影响 总被引：1，自引：0，他引：1
本研究旨在探究不同浓度白藜芦醇处理对奶牛性控冻精品质和体外受精能力的影响。在解冻后的奶牛性控冻精中分别添加0、10~(-3)、10~(-4)、10~(-5) mol/L的白藜芦醇,各组精子在受精液中获能孵育1.5 h后,测定精子质量和体外受精能力。结果表明:添加白藜芦醇均可有效降低性控冻精中活性氧(ROS)含量、提高顶体完整活精子比例(P0.05),其中10~(-3)、10~(-4) mol/L的白藜芦醇处理对降低ROS含量最为显著;10-4 mol/L的白藜芦醇处理可显著降低丙二醛(MDA)含量并提高性控冻精的卵裂率和囊胚率(P0.05)。综上所述,白藜芦醇作为一种外源性天然抗氧化剂,通过降低性控精液中过量的ROS水平、抑制精子脂质过氧化反应、保护顶体完整性,从而提高性控精子质量和体外受精能力。 相似文献
14.
Semen collection and AI in the cat are still not routine procedures. The correlation between semen quality and fertility under natural conditions is a relatively unknown field in the cat. In the present study, functional in vitro tests, such as the ability to bind and penetrate the zona pellucida or to fertilize in vitro, were used to determine fertilizing ability of sperm cryopreserved with a practical and efficient freezing protocol previously developed in our laboratory. Semen was collected by electroejaculation, evaluated for motility and diluted with Tris-glucose-citrate egg-yolk extender supplemented with Equex STM paste (0.5% v/v). After equilibration and loading into 0.25 ml straws, semen was frozen at 3.85 degrees C/min. Frozen-thawed semen was co-cultured with in vitro matured cat oocytes. Penetration rate was recorded 30 h after in vitro fertilization and cleaved zygotes were cultured in vitro until day 7. A correlation was found between sperm motility index (SMI) after thawing and semen fertilizing ability (p<0.05). In conclusion, it was demonstrated that the post-thaw motility quality, expressed as SMI, of spermatozoa frozen using the protocol mentioned above can be considered an index of the sperm ability to penetrate in vitro matured oocytes. 相似文献
15.
J Peláez E Breininger B Alegre FJ Peña JC Domínguez 《Reproduction in domestic animals》2006,41(2):153-161
Twenty-two boar ejaculates were frozen in 0.25 ml straws using a controlled cooling rate, then evaluated in vitro in order to assess: (i) the extent to which a range of semen evaluation parameters accurately characterize sperm quality, (ii) the value of quality assessment in the characterization of long-term sperm survival and fertility and (iii) the suitability of the cryopreservation protocol used for yielding semen with good quality and fertilizing capacity. Motility with or without caffeine, plasma membrane integrity (PMI) evaluated with both propidium iodide (PI) and Hoechst 33258, and acrosome morphology were studied, the ejaculates being then classified into five quality groups. A thermoresistance test and a homologous in vitro fertilization test were applied to selected ejaculates of these groups. Caffeine-stimulated motility and PMI evaluated with PI provided better estimations of semen quality than the other tests of motility, PMI, or acrosome morphology, but this quality assessment could not reveal differences in fertilizing capacity or thermoresistance among ejaculates. Over 43% spermatozoa survived cryopreservation in 19 of the 22 ejaculates, with inter-boar and inter-ejaculate variability in the freezing success being observed. The fertilizing capacity, however, was seriously affected by the process regardless of the semen quality. It is concluded that caffeine-stimulated motility and PMI evaluated with PI give accurate information on sperm quality, but important aspects to the valuation of semen such as thermoresistance and fertilizing capacity are not revealed by this quality study. Moreover, the approach of selecting suitable protocols of cryopreservation does not appear to be sufficient for guaranteeing systematically good quality and fertilizing capacity in the frozen-thawed semen. 相似文献
16.
Ylva Cecilia Bj?rnsdotter Sjunnesson Jane Margaret Morrell Raquel González 《Acta veterinaria Scandinavica》2013,55(1):20
Background
Good quality spermatozoa are important to achieve fertilization, viable embryos and offspring. Single Layer Centrifugation (SLC) through a colloid (Androcoll-P) selects good quality spermatozoa. However, it has not been established previously whether porcine spermatozoa selected by this method maintain their fertility.Methods
The semen was prepared either by SLC or by standard centrifugation (control) and used for in vitro fertilization (IVF) at oocyte:spermatozoa ratios of 1:50; 1:100 and 1:300 (or 4 x 103, 8 x 103 and 24 x 103 spermatozoa/ml) to evaluate their subsequent ability to generate blastocysts. In addition, sperm motility was assessed by computer assisted sperm motility analysis.Results
Total and progressive motility were significantly higher in sperm samples prepared by SLC compared to uncentrifuged samples. Sperm binding ability, polyspermy, cleavage and blastocyst rates were affected by the oocyte:sperm ratio, but not by sperm treatment.Conclusion
The use of SLC does not adversely affect the in vitro fertilizing and embryo-generating ability of the selected spermatozoa compared to their unselected counterparts, but further modifications in the IVF conditions would be needed to improve the monospermy in IVF systems. Since SLC did not appear to have a negative effect on sperm fertilizing ability, and may in fact select for spermatozoa with a greater potential for fertilization, an in vivo trial to determine the usefulness of this sperm preparation technique prior to artificial insemination is warranted. 相似文献17.
18.
The effect of Mycoplasma bovis (Donetta strain) on the ability of bull spermatozoa to interact with zona pellucida-free hamster oocytes was studied in an in vitro assay. Ejaculates of semen from a fertile Holstein bull were used fresh on the day of collection (unextended semen) as well as diluted with egg yolk-citrate and used the following day (extended semen). The addition of M. bovis to both unextended and extended semen at a mycoplasma to sperm cell ratio of 10:1 significantly reduced sperm penetration rates and the mean number of sperm per penetrated egg. Similarly, the ability of spermatozoa to form pronuclei and the activation of penetrated oocytes were adversely affected by M. bovis. No apparent effect on sperm motility was detected. When M. bovis was added to the oocytes, there was a marked reduction in the sperm penetration rates and fertilization processes suggesting that the organism affects certain oocyte function(s). The results indicate that the presence of M. bovis in semen or in the female reproductive tract may affect fertilization. Moreover, the in vitro assay with hamster oocytes was found to be useful for demonstrating the effects of contaminating microbial agents on bovine fertilization processes. 相似文献
19.
A porcine in vitro fertilization (IVF) system and seminal quality parameters of frozen–thawed boar semen were used to assess the effectiveness of two different thawing rates of frozen boar semen, and to address the question of whether differences between fertility of ejaculates could be predicted in a limited field trial. In the first experiment, two thawing procedures were analysed (37°C, 30 s; 50°C, 12 s) and no differences in sperm quality were found. However, when the procedure was 50°C, 12 s the IVF results showed a higher number of sperm per penetrated oocyte and a near 10 points higher rate of pronuclear formation. In the second experiment, the fertility results obtained in the limited field trial show to be efficient enough for application in a commercial use, especially for three of the employed boars (fertility ≥80%). In this limited study, the conventional seminal parameters are not accurate enough to discriminate good and bad boars in relation to fertility. On the contrary, parameters of in vitro penetrability are more precise to predict subsequent fertilities. As conclusion, the IVF fertilization system seems to be a good tool to evaluate the quality of frozen–thawed boar semen previous to its commercial way, to verify the bank semen storage quality and a good way to assay new sperm freezing procedures, as it is the more precise evaluating method in estimating the potential fertilizing ability. 相似文献
20.
In vitro Effect of Zearalenone and α-Zearalenol on Boar Sperm Characteristics and Acrosome Reaction 总被引：2，自引：0，他引：2
IA Tsakmakidis AG Lymberopoulos C Alexopoulos CM Boscos SC Kyriakis 《Reproduction in domestic animals》2006,41(5):394-401
This study was conducted to determine the in vitro effects of three different concentrations (125, 187.5 and 250 microM in diluted semen) of zearalenone (zen) and alpha-zearalenol (alpha-zen) on boar sperm. Semen parameters such as motility, viability and spontaneous acrosome reaction were evaluated. From the results it was shown that both zen and alpha-zen affected the sperm characteristics significantly (p < 0.05), except for alpha-zen at the low concentration which did not decrease the percentage of live reacted spermatozoa significantly. In conclusion, zen and alpha-zen are directly toxic when they affect boar semen in vitro and consequently decrease the fertilization ability of the sperm. The higher the concentration of mycotoxin tested, the greater the decline of sperm parameters noticed. The influence of mycotoxins was found to be time- and dose-dependent. 相似文献