猪0.5mL细管冷冻精液的人工授精试验

Studies on artificial insemination with 0.5 mL straws frozen semen in boar

【目的】制备猪0.5mL细管冷冻精液,并对其输精效果进行检测。【方法】制备猪0.5mL细管冷冻精液,解冻后对其品质(活力、快速直线游动精子比例、质膜完整率、顶体完整率)进行检测。将36头母猪随机分为8组:A-1、A-2组(各5头)均输新鲜精液精子4×109个,稀释至80mL,其中A-1组采用常规输精,A-2组采用子宫内人工输精;B-1、B-2组(各4头)均采用子宫内人工输冷冻精液,精子数量分别为1×109和2×109个,均稀释至20mL;C-1、C-2组(各5头)均采用子宫内人工输冷冻精液精子2×109个,C-1组稀释至60mL,C-2组稀释至80mL;D-1、D-2组(各4头)均采用子宫内人工输冷冻精液精子4×109个,D-1组稀释至60mL,D-2组稀释至80mL。人工授精后记录妊娠率、受胎率及产仔数量。【结果】制作的猪0.5mL细管冷冻精液解冻后,活力最高的达到(42.4±0.9)%,质膜完整率为(47.2±0.3)%,顶体完整率为(46.8±0.4)%。新鲜精液平均妊娠率为100%,产仔数为9.00±0.63;冷冻精液平均妊娠率为72%,产仔数为6.64±0.82,新鲜精液妊娠率和产仔数均显著优于冷冻精液。【结论】新鲜精液人工输精效果优于冷冻精液;冷冻精液采用60和80mL稀释液体积对产仔率、产仔数没有明显影响;冷冻精液通过子宫内人工输精,效果最佳的精子数为2×109个,稀释液体积为60mL。

【Objective】 0.5 mL straws frozen boar semen were produced to observe the result of artificial insemination.【Method】 Thirty-six sows were randomly divided into eight groups.Group A-1（n=5） and A-2（n=5） sows were inseminated with fresh semen with a dose of 4×109 spermatozoa,using 80 mL extender.group A-1 using conventional AI and A-2 using IUI catheter.Group B-1（n=4） and B-2（n=4） sows were used for intrauterine insemination with frozen semen with 20 mL extender.B-1 with a dose of 1×109 spermatozoa and B-2 with a dose of 2×109 spermatozoa.Group C-1（n=5） and C-2（n=5） sows were used for intrauterine insemination with frozen semen with a dose of 2×109 spermatozoa,C-1 using 60 mL extender and C-2 using 80 mL extender.Group D-1（n=4） and D-2（n=4） sows were used to intrauterine insemination with frozen semen with a dose of 4×109 spermatozoa,C-1 using 60 mL extender and C-2 using 80 mL extender.The pregnancy rate（PR）,farrowing rate（FR） and total number of piglet born（TNB） were recorded.【Result】 The above procedures yielded the highest post-thaw motility of（42.4±0.9）% and the plasma integrity of（47.2±0.3）%,together with the normal acrosome was（46.8±0.4）%.Inseminations with fresh semen yielded a pregnanty rate of 100% and a mean litter size of 9.00±0.63 NBA（Number boar alive） piglets.Insemination with frozen semen yieled a pregnancy rate of 72% and a mean litter size of 6.64±0.82 NBA piglets.Compared fresh with frozen semen,the pregnancy and farrowing rates were higher than those in frozen semen groups.【Conclusion】 Artificial insemination with fresh sperm was better than frozen semen.Frozen semen diluted with 60 and 80 mL volume had no significant effect on the birth rate,and the number born alive.In conclusion,frozen boar semen can be used successfully by using IUI catheter at a dose of 2×109 spermatozoa,diluted with 60 mL of semen extender.