포유중인 모돈에서 성선자극호르몬 투여 및 예정시각 인공수정이 발정재귀 및 번식성적에 미치는 영향
Effect of Administration of Gonadotropin and Scheduled Fixed-time Insemination on Onset of Estrus and Reproductive Performance in Lactating Sows
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초록
본 연구는 포유중인 모돈에서 이유 전과 후에 성선자극호르몬 투여 및 예정시각 인공수정이 번식성적에 미치는 영향을 조사하였다. 포유중인 모돈은 대조구, 이유 전 2일 및 이유 후 1일에 성선자극호르몬을 주사 하였다. 성선자극호르몬을 주사한 모돈의 1/2은 발정확인 후 24 및 36시간에 인공수정 하였고, 1/2은 GnRH 주사 후 24 및 36시간에 각각 예정시각 인공수정 하였다.포유중인 모돈에서 대조구, 이유 전 및 이유 후 성선자극호르몬을 투여 하여 발정재귀를 관찰한 결과 이유 후 성선자극호르몬 투여구가 발정재귀율이 높게 조사 되였으나 유의적 차이는 없는 것으로 조사되었다. 성선자극호르몬 투여가 발정재귀 시간에 미치는 영향을 조사한 결과 이유 전 성선자극호르몬 투여구가 발정 재귀시간이 유의적으로 짧은 것으로 조사되었다(P<0.01). 포유중인 모돈에서 성선자극호르몬을 이유 전 또는 이유 후에 투여한 후 인공수정을 실시한 결과 분만율과 산자수는 유의적인 차이는 없었다. 예정시각 인공수정에 따른 산자수는 이유 전 성선자극호르몬 처리구와 이유 후 성선자극호르몬 처리구에서 예정시각 인공수정 처리구가 발정관찰인공수정에 비하여 유의적으로 적었다(P<0.01).이상의 결과를 종합해 보면 성선자극호르몬은 포유중인 모돈에서 난포를 발육시킬 수 있으며, 이유 전 성선자극호르몬의 투여는 발정재귀일의 단축 효과를 기대 할 수 있으나 포유돈에 있어 발정재귀율 개선과 향상된 번식성적과의 상관 관계 정립을 위한 추가적인 연구가 필요할 것으로 사료된다.
Abstract
This study was to investigate the effectiveness of pre-weaning injection of gonadotropin and scheduled fixed-time insemination on sow fertility. Sows were randomly assigned to receive gonadotropin 2 days before weaning, 1 day after weaning or none as control. In gonadotropin treated groups, half of sows were inseminated twice at 24 and 36 hours after onset estrus and half of sows were inseminated twice at scheduled fixed-time. Weaning to onset of estrus was the shortest in lactating sows injected with gonadotropin prior to weaning. Liter size was significantly higher in AI groups after detection of estrus, compared to fixed-time AI group. Results of these experiments indicated that injection of gonadotropin in lactating sows could initiate the final follicular development, and has potential to enhance the reintegration of estrus. Further researches are needed to define the relationship between reduced interval of wean to onset estrus and enhanced fertility in lactating sows.
참고문헌 (28)
- "Control of the weaning-to-estrus interval in sows using gonadotropins and prosta- glandins during lactation", 77, pp.2533~2539 (1999)
- "M. A. 1991. Reproductive perfor- mance of sows treated with a combination of pregnant mare’s serum and human chorionic gona- dotropin at weaning in the summer. J. Anim. Sci. 69", pp.894~898
- "G. 1984. Untersuchungen zur ovulationsdynamik und-potenz in jungsauengruppen verschiedener betriebe nach anwendung unterschiedlicher behandlungen zur ovulationsstimulation. Arch. Exper. Vet. med. 38", pp.735~743
- "K. L. 1985. Control of follicular development during and after lactation in sows. J. Reprod. Fertil. Suppl. 33", pp.37~54
- "F. 1990. Determination of the duration of ovula- tion in gilts by means of laparoscopy. Reprod. Dom. Anim. 25"
- "R. D. 1962. Induction and control of ovulation in swine. J. Anim. Sci. 21", pp.697~699
- "P. J. 1977. Reproduction in pigs. 3rd edition", pp.455~474
- "F. 1984. Endokrinologie des Zyklus der Ovulation und des Laktationsstrus. Zchtungskunde. 54", pp.333~338
- "Effect of exogenous gonadotropins on the weaning-to- estrus interval in sows", 49, pp.823~828 (1998)
- "Effect of PG600 on rebreeding performance in sows limit-fed during lactation", 6, pp.51~62 (2006)
- "P. A. 1989. Effects of injection of gonadotropin- releasing hormone on sow fertility. Can. J. Anim. Sci. 69", pp.123~129
- "U. 1977. Untersuchungen zur einfachbesamung von jungsauen nach puberttsinduktion und ovulations- synchronisation. Wiss. Zeitschr. Univ. Rostock. 26", pp.427~430
- "J. E. 1993. Com- parison of endocrinology and behavioural events during the preovulatory period in meishan and large white hybrid gilts. J. Reprod. Fertil. 97", pp.475~480
- "R. H. F. 1967. Porcine ovulation after injection of human chorionic gonadotropin. Vet. Rec. 81", pp.2123~
- "T. 1978. Induction of estrus and ovulation in prepuberal gilts with special regards to subsequent fertilization by insemination at predetermined hours after the hormonal treatments. Japan J. Anim. Reprod. 24", pp.39~45
- "Synchronization of estrus and ovulation in sows not conceiving in a scheduled fixed-time insemination program", 97, pp.84~93 (2007)
- "Use of hCG to induce a prolonged luteal phase in gilts", 87 (1998)
- "Pharmacological inter- vention in swine reproduction", 7, pp.29~35 (1999)
- "Admini- stration of PG600 to sows at weaning and the time of ovulation as determined by transrectal ultrasound", 79, pp.796~802 (2001)
- "Influence of simulated stress during standing oestrus on ovulation and hormonal profile in the sow", 39, pp.255~ (2004)
- "Synchronization of oestrus in gilts with altrenogest : effects on ovulation rate and foetal survival", 39, pp.267~274 (1995)
- "W. G. 1965. Histological changes in the reproductive tract of the sow during lactation and early postweaning. J. Anim. Sci. 24", pp.1117~1125
- "Fertility of sows following artificial insemination at a gonadotrophin-induced estrus coincident with weaning", 76, pp.245~250 (2003)
- "Ein Beitrag zur Brunstauslosung und erhohter Fruchtbarkeit bei Zuchtsauen durch die Verabreichung gonadotroper Hormone (eCG und hCG)", 52, pp.13~16 (1995)
- "Effect of equine chorionic gonadotropin on weaning-to-first service interval and litter size of female swine", 51, pp.1175~1182 (1999)
- "Relationship between peri- oestrus progesterone levels and time of ovulation by echography in pigs and influence of the interval between ovulation and artificial insemi- nation (AI) on litter size", pp.393~404 (2000)
- "Advanced ovulation in gilts by the intrauterine application of a low molecular mass pronase-sensitive fraction of boar seminal plasma", 105, pp.247~252 (1995)
- "R. 1994. Effect of time of insemination relative to ovulation on fertility with liquid and frozen boar semen. Theriogenology. 42", pp.831~840