Methods and Effects of Hongshan Cock Spermatozoa Cryopreservation

The survival rates, acrosomic integrity rates of frozen semen from Hongshan cock and fertilities of the frozen-thawed spermatozoa in both pellets and straws were studied. The result shows that the average survival rate of spermatozoa in straws was 0, 451±0, 056, and 0. 390±0. 040 in pellets, the former was significantly higher than the later （n=20, p〈0, 01）, The average acrosomic integrity rate of the sperms was 0, 613±0. 049 in straws, and 0. 476±0. 057 in pellets. The former was significantly higher than the later （n= 20, p〈0.05）. The fertility rates （%） of sperms in pellets, straws and freshly colleered semen at the third day after artificial insemination （AI） were 85.32±2. 32, 87. 73±1.00 and 90.77±1.68, respectively. The fertility rate,s of the three types of semen at the fourth and fifth days were lower than the third day＇s. Variance analysts shows that the fertilities of the spermatozoa in pellets and straws were significantly lower than freshly collected semen （n=3, p〈0.01）, and the fertilities of the spermatozoa in straws were significantly higher than those in pellets （n= 3, p〈0.01）.

公鸡精子冷冻保存后活率和顶体破损率的相关关系

用BPSE为稀释液,以终浓度为11%(V/V)的甘油作低温保护剂,冷冻洪山公鸡精液。测定了细管型和颗粒型2种类型的冷冻精液解冻后的精子存活率和顶体破损率,并对冻后存活率和顶体破损率进行了相关和回归处理。测定结果表明,细管型冷冻精液解冻后的精子存活率和顶体破损率分别为0.451±0.056和0.392±0.054(n=20)。颗粒型冷冻精液解冻后的精子存活率和顶体破损率分别为0.339±0.040和0.543±0.052(n=20)。前者解冻后的活率极显著高于后者,而顶体破损率则极显著低于后者。相关分析结果表明,细管型冷冻精液解冻后精子存活率与顶体破损率之间的回归方程为y=0.7293-0.7126x,相关系数r为-0.697(P<0.01),而颗粒型冷冻精液解冻后的精子存活率与顶体破损率之间的相关系数为-0.0625(P>0.05),表明两者之间无显著相关。本研究为输入相等数量的活精子时细管型冷冻精液受精率显著高于颗粒型冷冻精液的试验结果提供了一定的理论解释,也为将保存家畜冷冻精液的方法应用于家禽方面作了有益的探索。

洪山公鸡精液冷冻保存方法及效果的研究

研究比较了两种不同类型的冷冻精液在解冻后精子活率、顶体完整率以及受精率方面的差异。实验结果表明,细管型冷冻精液解冻后的活率显著高于颗粒型(n=20,p<0.01)。细管型冷冻精液解冻后的顶体完整率显著高于颗粒型(n=20,p<0.05)。受精实验结果表明,两种类型的冷冻精液的受精率都显著低于以新鲜精液输精的对照组(p<0.01),颗粒型冷冻精液的受精率显著高于细管型冷冻精液(p<0.01)。

公鸭、公鸡精子对在液氮中低温冷冻保存耐受力的比较研究

比较公鸭和公鸡精子经低温冷冻保存后存活率、顶体完整率方面的差异。结果表明,公鸭冷冻精液解冻后的精子存活率和顶体完整率都不同程度地高于相同类型的公鸡冷冻精液,但差异均未达到显著水准(P>0.05)。

DMA和甘油对公鸡精子冷冻保护作用的比较

比较了6%的DMA和11%的甘油冷冻洪山公鸡精液后精子在存活率、顶体完整率方面的差异。结果表明,用DMA做冷冻保护剂的颗粒型冷冻精液解冻后的精子存活率和顶体完整率分别为0.320±0.041和0.600±0.049,用甘油做冷冻保护剂的颗粒型冷冻精液解冻后的精子存活率和顶体完整率分别为0.313±0.036和0.597±0.040,两者差异不显著。用DMA做冷冻保护剂的细管型冷冻精液解冻后的精子存活率和顶体完整率分别为0.388±0.034和0.652±0.042,用甘油做冷冻保护剂的细管型冷冻精液解冻后的精子存活率和顶体完整率分别为0.433±0.054和0.750±0.048,前者在精子存活率(P<0.05)和顶体完整率(P<0.01)方面都显著低于后者。