共查询到20条相似文献，搜索用时 156 毫秒
1.
为了研究褪黑素对绒山羊精液冷冻保存效果的影响,在冷冻稀释液中外源补充不同浓度(0.125,0.250,0.500,1.000 mg/mL)的褪黑素进行冷冻试验,冷冻解冻采用计算机辅助精液分析系统(CASAS)和流式细胞仪分别检测精子活率、质膜完整率、顶体完整率以及精子细胞中活性氧(ROS)的含量。结果表明:在冷冻稀释液中添加褪黑素能够显著降低精子细胞中ROS的含量,而且在冷冻稀释液中添加浓度为0.500 mg/mL的试验组绒山羊精子活率(53.3%)、质膜完整率(44.6%)、顶体完整率(77.9%)均显著高于空白对照组(47.8%、36.3%和53.2%)(P0.05)。说明在绒山羊精液冷冻稀释液中添加0.500 mg/mL褪黑素能够显著提高绒山羊精子抗氧化能力和冷冻保存效果。 相似文献
2.
实验旨在研究冷冻稀释液中添加附睾尾液（Cauda Epididymal Fluid,CEF）对绵羊精液冷冻保存的影响。利用假阴道法收集4只湖羊精液并混合,以附睾尾液中总蛋白为基准,在冷冻稀释液中分别添加不同浓度CEF(0、140、280、420μg/mL)。精液经过冷冻后投入液氮保存,解冻后检测精子活力、运动参数,以及质膜完整率、顶体完整率、线粒体膜电位、37℃精子存活时间等指标。结果表明：冷冻-解冻后280μg/mL CEF组的精子活力、前向运动、平均路径速度、直线运动速度、直线度、线性度、头部横向位移幅度均显著高于其他各组（P<0.01）,曲线运动速度高于其他各组（P<0.05）;精子质膜完整率、顶体完整率也高于其他各组（P<0.05）;JC-1染色结果显示,280μg/mL CEF组精子线粒体膜电位高于其他各组（P<0.05）;280μg/mLCEF组精子在37℃环境下可存活14h,较对照组精子能多存活4h。可见,在冷冻稀释液中添加适量CEF可以提高精液的冷冻效果。 相似文献
3.
在猪精液冷冻基础液中分别添加0μg/mL,10μg/mL,20μg/mL,30μg/mL,40μg/mL,50μg/mL的葡萄籽原花青素,通过对冷冻-解冻后猪精子的动力学参数、生理参数以及生化参数的检测,旨在研究其对猪精液冷冻保存效果的影响。结果表明,当葡萄籽原花青素添加浓度为20μg/mL和50μg/mL时,解冻后精子活力、活率、顶体完整率、线粒体活性、质膜完整性和酶活性都显著高于对照组(P0.05),但是两组间比较差异不显著(P0.05)。与对照组和其他实验组相比,当葡萄籽原花青素添加浓度为40μg/mL时,精子畸形率降低了9.30%,精子活力、活率、顶体完整率、线粒体活性和质膜完整性分别提高了12.59%、11.78%、14.27%、12.53%和11.96%(P0.05)。当葡萄籽原花青素的添加量为40μg/mL时,MDA的量最低为1.16nmol/mg,SOD和GSH-Px酶活性最大分别为77.36U/mg、35.21U/mg。结果显示,在猪精液稀释液中添加一定浓度的葡萄籽原花青素,可以显著提高冷冻-解冻后猪精子品质和抗氧化能力。当葡萄籽原花青素的添加量为40μg/mL时,其对猪精子冷冻保存效果最好。 相似文献
4.
本研究旨在探讨添加辅酶Q10对杜洛克公猪精液冷冻保存过程中精液品质的影响,试验分为6个组,分别为空白对照组(基础冷冻液)、阴性对照组(基础冷冻液+0.1%氯仿)和试验组(分别在基础冷冻液中添加50、150、250、350μg/mL的辅酶Q10),检测冷冻-解冻后精子运动参数、质膜完整率(MI)、顶体完整率(AI)、线粒体膜电位(MA)、DNA完整率、ROS水平、MDA和ATP含量以及SOD、CAT、GSH-Px活性,并且对精子冷冻-解冻后的超微结构进行观察以及测定各凋亡因子的表达量。结果表明:添加150μg/mL辅酶Q10试验组运动参数、SOD、CAT、GSH-Px活性、ATP、ROS含量、MI、AI、DFI以及线粒体膜电位较空白对照组提高(P<0.01),而MDA含量降低(P<0.05);Bcl-2基因在添加50μg/mL和150μg/mL辅酶Q10组中的表达量高于空白对照组(P<0.05),Bax、Caspase3基因的表达量较空白对照组均降低(P<0.05);扫描电镜观... 相似文献
5.
本实验旨在研究二甲双胍对犬冷冻-解冻后精液品质的改善效果,用含有不同浓度(0、25、50、100μmol/L)二甲双胍的Tris-卵黄稀释液冷冻保存犬精液,解冻后测定精子活力、质膜完整率、顶体完整率、活性氧(ROS)含量、丙二醛(MDA)含量、线粒体膜电位状态及腺苷三磷酸(ATP)含量等指标.结果显示:二甲双胍添加组的... 相似文献
6.
为了研究冷冻稀释液中添加不同浓度的抗氧化剂生物类黄酮和维生素C对猪精液冷冻保存效果的影响,试验分别在冷冻稀释液中添加0,0.4,0.6,0.8,1.0 mg/mL的生物类黄酮和0,2,4,6,8 mg/mL的维生素C以及二者最佳配伍浓度的混合物,分别检测各试验组精液冷冻解冻后的活率、质膜完整率、顶体完整率、线粒体活率等指标。结果表明:除了添加4,6 mg/mL维生素C顶体完整率与对照组相比差异不显著(P>0.05)外,添加0.4,0.6,0.8,1.0 mg/mL生物类黄酮或2,4,6,8 mg/mL维生素C精子活率、质膜完整率与对照组相比差异均显著(P<0.05),其中添加0.8 mg/mL生物类黄酮和6 mg/mL维生素C效果最好,但随着添加浓度的增加冷冻效果逐渐降低。说明在猪精液冷冻稀释液中联合添加生物类黄酮和维生素C,解冻后精液质量显著高于对照组(P<0.05)。 相似文献
7.
为了研究牛血清白蛋白(BSA)对犬精液冷冻保存效果的影响,试验配制含有不同浓度(0、3%、5%、7%)BSA的精液冷冻稀释液用于保存犬精液,测定冷冻-解冻后精子活力、质膜完整率、顶体完整率、总抗氧化能力(T-AOC)、丙二醛(MDA)含量及线粒体膜电位(MMP)等指标。结果表明：3%和5%BSA组冷冻-解冻后精子活力、质膜完整率、顶体完整率和T-AOC均显著高于对照组(P<0.05);3%BSA组MDA含量显著低于其他各组(P<0.05),线粒体膜电位值显著高于其他各组(P<0.05);除精子活力外,7%BSA组和对照组之间各项指标均差异不显著(P>0.05)。说明在犬精液冷冻稀释液中添加BSA能有效改善冷冻-解冻后精液品质,对提高精子抗氧化能力及代谢能力都有显著效果,BSA的最适添加浓度为3%。 相似文献
8.
为了探究芝麻酚对猪精液冷冻保存效果的影响,用手握法采集成年杜洛克公猪精液,预处理后添加不同浓度芝麻酚(0,0.05,0.10,0.15,0.20和0.25g/L)的冷冻稀释液进行稀释,冷冻-解冻后检测猪精子活率、质膜完整性(低渗肿胀试验)、线粒体活性、顶体完整性、DNA完整性以及超氧化歧化酶(superoxide dismutase,SOD)、过氧化氢酶(catalase,CAT)和谷胱甘肽过氧化物酶(glutathione peroxidase,GSH-Px)活性等。结果显示:当芝麻酚添加浓度为0.20g/L时,解冻后精子活率、线粒体活性、质膜完整率和顶体完整率为最高,相比较于对照组,分别提高了12.67%、19.07%、18.78%和14.09%(P0.05);MDA含量最低为2.04nmol/mL(P0.05);SOD和GSH-Px酶活最高为73.04U/mL和237.59U/I(P0.05)。当芝麻酚添加浓度为0.25g/L时,DNA完整性最高为72.46%(P0.05)。当芝麻酚添加浓度为0.15g/L时,CAT酶活最高为3.44U/mL(P0.05)。结果表明:与对照组相比较,在猪精液冷冻稀释液中添加适当浓度的芝麻酚能显著提高解冻后猪精子活率、功能完整性和抗氧化能力(P0.05),且当芝麻酚的浓度为0.2g/L时对猪精子冷冻保存效果最好。研究结果表明,芝麻酚作为一种天然抗氧化剂,对猪精子冷冻保存具有良好的效果。 相似文献
9.
在LEY冷冻稀释液基础上分别添加不同浓度维生素C(0、5、10、20、40、60 mmol/mL)、维生素E(0、0.2、0.5、1.0、2.5、5.0 mg/mL)、SOD(0、100、200、400、600 IU/mL)、CAT(0、50、100、200、300 IU/mL)、GSH(0、1、5、10 mmol/mL)等抗氧化剂,检测冷冻-解冻后精子活力、活率、质膜完整率、顶体完整率、平衡后和解冻后精子MDA含量,以观察5种抗氧化剂对猪精液冷冻保存效果的影响。结果表明:在冷冻稀释液中联合添加100 IU/mLSOD和200 IU/mL CAT明显提高冷冻-解冻后精子活力、活率、质膜完整率和顶体完整率(P<0.01)。 相似文献
10.
为提高猪精液常温保存效果,本试验探讨17℃保存过程中,在Modena稀释液在不同浓度辅酶Q10(Co-Q10)(0、10、15、25、35μg/mL)对猪精液质量的影响。在17℃条件下每隔24 h检测不同组的精子活力、pH,每隔48 h检测精液的渗透压、精子线粒体活性和质膜完整率。结果表明：保存第5天,25μg/mL Co-Q10组精子活力、线粒体活性、质膜完整率均高于其他组（P<0.05）,pH下降速度也最慢,并且对渗透压变化影响不大。综合考虑Co-Q10在猪精液17℃保存中的适宜添加浓度为25μg/mL。 相似文献
11.
AA Memon H Wahid Y Rosnina YM Goh M Ebrahimi FM Nadia 《Reproduction in domestic animals》2013,48(2):325-330
To improve the Boer goat semen quality during cryopreservation process, three experiments were carried out to investigate the effect of (i) different concentration of ascorbic acid supplementation (ii) rate of cooling with chilled semen characteristics and (iii) method of freezing on post‐thaw Boer goat sperm using Tris‐based extender. Ascorbic acid at 8.5 mg/ml improved the sperm parameters (motility, integrity of membrane and acrosome, morphology and viability), compared to control in cooled samples (p < 0.05). With regard to other concentrations and post‐thawed parameters, ascorbic acid at 2.5–8.5 mg/ml led to higher percentages of sperm motility and integrities of membrane and acrosome when compared to control (p < 0.05). Slow cooling rises to higher percentages of sperm motility, acrosome integrity and viability, in comparison with fast cooling, in terms of cooled and frozen samples (p < 0.05). Programmable freezing method produced the higher percentages of sperm motility, integrities of membrane and acrosome and viability when compared to the freezing method of polystyrene box during goat sperm freezing (p < 0.05). In conclusion, chilled and post‐thawed sperm quality of Boer goat was improved when a Tris‐based extender supplemented with ascorbic acid was used at stages of different cooling rates and freezing methods. 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
13.
K Kaeoket P Sang‐urai A Thamniyom P Chanapiwat M Techakumphu 《Reproduction in domestic animals》2010,45(3):458-463
During the cryopreservation process, the level of polyunsaturated fatty acids, especially docosahexaenoic acid (DHA), in the sperm plasma membrane decreases significantly because of lipid peroxidation, which may contribute to sperm loss quality (i.e. fertility) of frozen–thawed semen. The aim of this study was to investigate the effect of supplementation of DHA (fish oil) in freezing extender II on frozen–thawed semen quality. Semen from 20 boars of proven motility and morphology, were used in this study. Boar semen was split into four groups, in which the lactose–egg yolk (LEY) extender used to resuspend the centrifuged sperm pellet was supplemented with various levels of fish oil to reach DHA level of 1X (group I, control, no added fish oil), 6X (group II), 12X (group III) and 18X (group IV). Semen solutions were frozen by using a controlled rate freezer. After cryopreservation, frozen semen was thawed and evaluated for progressive motility, viability by using SYBR‐14/Ethidiumhomodimer‐1 (EthD‐1) staining and acrosome integrity by using FITC‐PNA/EthD‐1 staining. There was a significantly higher (p < 0.001) percentage of progressive motility, viability and acrosome integrity in DHA (fish oil) supplemented groups than control group. Generally, there seemed to be a dose‐dependent effect of DHA, with the highest percentage of progressive motility, viability and acrosome integrity in group‐III. In conclusion, supplementation of the LEY extender with DHA by adding fish oil was effective for freezing boar semen as it resulted in higher post‐thaw plasma membrane integrity and progressive motility. 相似文献
14.
【目的】 探究冷冻前添加热休克蛋白A8(heat shock protein A8, HSPA8)和解冻后添加不同浓度精浆(seminal plasma, SP)对冻融猪精子的影响。【方法】 采用手握法采集长白猪精液, 添加0.5 μg/mL HSPA8到猪精液冷冻保护剂中进行细管分装, 投入液氮中保存3周后进行解冻, 解冻后添加不同浓度精浆(0、10%、30%和50%), 对冻融后长白猪精子的运动能力、质膜完整性、顶体完整性、细胞凋亡、线粒体膜电位、鱼精蛋白缺乏及体外获能水平等进行评估。【结果】 与对照组相比(无HSPA8和精浆), 添加0.5 μg/mL HSPA8处理组(无精浆)的精子直线速度(VSL)、曲线速度(VCL)、平均路径速度(VAP)和前向性运动(STR)均显著提升(P<0.05), 精子直线性运动(LIN)和运动的摆动性(WOB)均无显著差异(P>0.05);精子质量参数中活力、质膜完整性和顶体完整性均显著升高(P<0.05), 细胞凋亡水平与线粒体膜电位均显著降低(P<0.05);精子鱼精蛋白缺失率显著降低(P<0.05);精子蛋白酪氨酸磷酸化水平显著提高(P<0.05)。之后在解冻液中添加不同浓度的精浆, 与添加0.5 μg/mL HSPA8处理组(无精浆)相比, 精浆添加量达到50%时, 精子VSL、VCL、VAP、LIN、STR和WOB均显著提升(P<0.05);精子活力、质膜完整性、顶体完整性和线粒体膜电位均显著提高(P<0.05), 细胞凋亡水平显著降低(P<0.05);精子鱼精蛋白缺失率显著降低(P<0.05);精子蛋白酪氨酸磷酸化水平显著提高(P<0.05)。【结论】 在冷冻基础液中添加0.5 μg/mL HSPA8和解冻稀释液中添加50%精浆联合使用可以有效改善冻融精子质量, 将会对猪精液的冷冻保存及商业化生产提供一定的参考。 相似文献
15.
海藻糖和甘油相互协同提高绒山羊精液冷冻保存品质 总被引：1，自引：0，他引：1
本实验旨在研究不同浓度的海藻糖和甘油相互协同对绒山羊精液冷冻保存的影响。将0 mmol/L (T0)、50mmol/L(T50)的海藻糖和0%(G0)、1%(G1)、2%(G2)、3%(G3)的甘油分别组合为T0G0、T0G1、T0G2、T0G3、T50G0、T50G1、T50G2和T50G3。以Tris-柠檬酸-葡萄糖(TCG)为基础稀释液,分析不同组合对绒山羊精液冷冻保存的影响。检测解冻后精子活力、运动参数、DNA完整率、顶体、质膜完整率、抗氧化水平。结果表明:海藻糖和甘油联合添加时精子冷冻保存效果显著高于单独添加海藻糖或甘油组,其中T50G1组作用最显著。在基础稀释液中添加50 mmol/L(T50)的海藻糖时,精子冷冻解冻后的活力、质膜完整率随着甘油浓度的升高而降低,而在基础稀释液中不添加海藻糖时,精子冷冻解冻后的活力、质膜完整率随着甘油浓度的升高而升高。综上表明,海藻糖和甘油通过协同作用提高精子冷冻保存效果,两者发挥作用的最适浓度为50 mmol/L海藻糖和1%甘油,并且海藻糖和甘油协同作用对精子活力以及质膜完整性具有浓度依赖性。 相似文献
16.
Cristina lvarez Noelia Gonzlez Victoria Luo Felisa Martínez Lydia Gil 《Reproduction in domestic animals》2019,54(Z4):94-97
The aim of this study was to test and compare two new components in extenders for freezing donkey semen: mare colostrum and jenny colostrum. Colostrum was obtained from four mares and four jennies right after the foal's birth. Ejaculates were collected from five fertile donkeys. Sperm samples were pooled, diluted and cryopreserved in three different experimental extender groups: lactose supplemented with egg yolk extender (20%) as the control group, lactose supplemented with jenny colostrum extender (20%), and lactose supplemented with mare colostrum extender (20%). After thawing, we evaluated the sperm motility by means of computer‐assisted analysis, viability by SYBR‐14 and propidium iodide (PI), membrane functional by HOS test and acrosome integrity by isothiocyanate conjugated with peanut agglutinin (FITC‐PNA) and PI. The results demonstrated that lactose–jenny colostrum extender displayed significantly higher values (p < .05) in nearly all parameters evaluated – Total Motility, Viability, HOS test, VCL, VSL, VAP, LIN, STR and WOB –, compared with mare colostrum and egg yolk extenders after thawing. In conclusion, the extender containing jenny colostrum used for donkey semen cryopreservation improved the donkey sperm quality after the freezing–thawing process. 相似文献
17.
试验旨在研究白藜芦醇对山羊冷冻精子质膜、DNA完整性和温度耐受性的影响。采用假阴道法采集8只云上黑山羊精液,用含不同浓度（0、0.1、1、10和20 μmol//L）白藜芦醇的Optidyl稀释液稀释后进行细管分装,对照组不添加白藜芦醇。在5 ℃平衡4 h后,将细管于液氮蒸气中预冻10 min,最后在液氮中保存30 d。37 ℃水浴解冻后,采用低渗耐受性试验检测质膜完整性和温度耐受性,精子染色质扩散法检测DNA碎片率等指标。结果显示,10 μmol/L白藜芦醇冷冻组精子弯尾率显著高于其他各处理组（P<0.05）,而其他各冷冻组之间无显著性差异（P>0.05）;10 μmol/L白藜芦醇冷冻组精子DNA碎片率极显著高于鲜精组（P<0.01）,极显著低于未添加白藜芦醇冷冻组（P<0.01）。温度耐受性试验结果表明,不同浓度白藜芦醇冷冻组精子37 ℃水浴1 h后的精子弯尾率以10 μmol/L冷冻组最高,与其他各冷冻组间差异极显著（P<0.01）;精子弯尾率随着孵育时间的延长而呈逐步下降的趋势,当孵育4 h时,10 μmol/L白藜芦醇冷冻组精子弯尾率与对照组无显著差异（P>0.05）。透射电镜结果表明,10 μmol/L白藜芦醇组精子质膜完整率显著高于不添加白藜芦醇对照组（P<0.05）。上述结果表明,在冷冻稀释液中添加白藜芦醇可显著改善山羊冻精质膜状态、DNA完整率和温度耐受性,其最佳作用浓度为10 μmol/L,但白藜芦醇是否能改善山羊冻精的人工授精效果还有待进一步研究。 相似文献
18.
Cow milk is used as an extender for ram semen cryopreservation. Caseins, the major proteins of milk, appear to provide some protective effect to sperm during cryopreservation. Goat milk has unique casein structure. The aim of this study was to investigate effect of goat milk, as a main semen extender, on freezability of Tushin Ram semen. For this aim, ejaculates from four Tushin rams were collected with artificial vagina and pooled. Pooled semen was separately extended with four different extenders: TRIS based (TRIS), cow skim milk based (CSM) (10 g/100 ml), cow semi‐skim milk based (CSSM) and goat semi‐skim milk based (GSSM) extenders, containing egg yolk and glycerol. The semen was cryopreserved and stored in liquid nitrogen until examination date. After thawing (at 37°C for 1 min), sperm motility, viability, morphology, acrosome and membrane integrity (HOST) were evaluated. Although, there was not any significant differences between extenders in post‐thaw percentage of viable spermatozoa (p > 0.05), Tushin ram semen extended with GSSM or CSM extenders had significantly higher post‐thaw percentage of progressive motility (25.0% and 30.8% respectively), compared with CSSM and TRIS (7.5% and 14.1% respectively, p < 0.001). Moreover, lowest abnormality percentage of post‐thaw spermatozoa were detected in ram semen extended with GSSM (49.5%) and CSM (51.5%), compared with CSSM (65.7%) and TRIS (60.7%) (p < 0.05). Whilst the results were considered, it was concluded that goat milk based extenders may be effectively and trustfully used in cryopreservation of Tushin ram semen, instead of cow milk and Tris based extenders, as a main extender. 相似文献
19.
Breed of Boar Influences the Optimal Concentration of Gamma‐oryzanol Needed for Semen Cryopreservation 
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下载免费PDF全文 The aim of this study was to investigate the influence of boar breed on the optimal concentration of gamma‐oryzanol on the qualities of cryopreserved boar semen. Semen was collected from 20 boars (10 Duroc, 5 Large white and 5 Landrace boars). The semen sample was divided into five groups (A–E) according to the concentration of gamma‐oryzanol in extender II, that is 0, 0.08, 0.16, 0.24 and 0.32 mm , respectively. The semen was cryopreserved by nitrogen vapour and storage in nitrogen tank (?196°C). After storage for a week, samples were thawed at 50°C for 12 s and evaluated for progressive motility, sperm viability and acrosome integrity. The results demonstrated that gamma‐oryzanol significantly improved progressive motility, viability and acrosome integrity of frozen–thawed boar semen. Considering the influence of breeds on the optimal concentration of gamma‐oryzanol, for Duroc boar, gamma‐oryzanol at 0.16 mm (group C) yielded the highest percentage of progressive motility, sperm viability and acrosome integrity. For Large white and Landrace boars, gamma‐oryzanol at 0.24 mm (group D) showed a significantly higher percentage of progressive motility, viability (not significant in Landrace) and acrosome integrity than other concentrations. In conclusion, the optimal concentration of gamma‐oryzanol needed for boar semen cryopreservation in lactose–egg yolk (LEY) freezing extender is not only depended on individual boar but also breed of boar, that is 0.16 mm for Duroc and 0.24 mm for Large white and Landrace. 相似文献
20.
Chanapiwat P Kaeoket K Tummaruk P 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2012,74(3):351-354
The present study determined the effect of different types of sugars (lactose, fructose, glucose and sorbitol) used in egg yolk-based extender on the post-thawed boar semen quality. Twenty-two ejaculates from 6 fertility-proven Yorkshire boars were cryopreserved by liquid nitrogen vapor method. Sperm motility, viability, acrosome integrity and intact functional plasma membrane were determined at 0, 2 and 4 hr after thawing. It was found that the lactose-based extender resulted in a higher percentage of post-thawed sperm motility, viability, intact acrosome and functional plasma membrane than sorbitol-based extender (P<0.05) and fructose-based extender yielded a higher post-thawed sperm motility and viability than sorbitol-based extender (P<0.05). It could be concluded that sorbitol was not an effective sugar for the cryopreservation in boar semen. 相似文献