인공수정 횟수가 모돈의 번식성적에 미치는 영향

국문 초록 (Abstract)

본 연구는 인공수정 횟수가 모돈의 번식성적에 미치는 영향을 알아보기 위하여 수행되었다. 총 48두 의 F1 모돈(Yorkshire×Landrace)을 공시하였으며, 완전임의화배치법(CRD)에 의하여 4개의 처리구에 배치되었다. 처리구는 인공수정 횟수(1회, 2회, 3회, 4회)이며, 발정확인 후 12시간 뒤부터 인공수정을 진행하였다. 모돈의 발정확인은 9시와 21시에 웅돈을 접촉시켜서 확인하였으며, 재귀발정일은 5-6일 인 모돈들을 대상으로 구배치 하였다. 모돈의 승가허용 확인 후 12시간 간격에 따라 9시와 21시에 처 리구에 따른 인공수정을 실시하였다. 인공수정 횟수가 모돈의 임신율, 수태율에는 유의적인 영향을 미 치지 않으며, 분만율에서는 3회 인공수정한 처리구가 다른 처리구들에 비해 낮은 수치를 보였다. 총산 자수, 생시자돈수, 복당체중과 같은 분만성적에서도 인공수정 횟수에 따른 통계적 차이는 나타나지 않 았다. 인공수정 횟수의 1회 감소는 7,000원의 정액비용을 절감할 수 있다. 따라서 발정확인 후 인공수 정을 1회하여도 다른 처리구들과 비교해 동일한 번식성적을 가지며, 1회 인공수정을 통한 정액비용의 감소는 농가의 생산비를 절감할 수 있을 것으로 사료된다.

다국어 초록 (Multilingual Abstract)

This experiment was conducted to investigate the effects of artificial insemination(AI) frequency on reproductive performance of sows. A total of 48 F1 sows(Yorkshire×Landrace) were allocated to 1 of 4 treatments using completely randomized design(CRD). Four experimental treatments were AI frequency from one to four times(AI1, AI2, AI3, AI4) respectively. Estrus detection was done at approximately 09:00 and 21:00 daily by applying back pressure to females with the presence of a mature boar and the weaning to estrus interval(WEI) of all sows were 5~6 day. Sows detected in estrus were mated at 12 hour after and mating interval was 12 hour by treatments. This experiment demonstrated that the lowest farrowing rate was observed AI3 treatment. Frequency of AI did not influence on reproductive performance when WEI was 5-6 day. No significant differences were observed on litter size, born alive and litter birth weight. Consequently, decreased AI frequency did not have any detrimental effect on reproductive performance when estrus detection was adequate. Decreased AI frequency could reduce cost of production of pigs when sows showed normal reproductive performance.

목차 (Table of Contents)

• 서론
• 재료 및 방법
• 1 실험동물 및 실험설계
• 2 사육관리 및 환경
• 3 인공수정
• 4 통계분석
• 결과 및 고찰
• 감사의 글
• References

참고문헌 (Reference)

1 Nissen AK, "The influence of time of insemination relative to time of ovulation on farrowing frequency and litter size in sows, as investigated by ultrasonography" 47 : 1571-1582, 1997

2 Tarocco C, "The effect of estrus duration and number of artificial inseminations on fertility of gilts and multiparous sows having a four-day wean-to-estrus interval" 9 (9): 117-120, 2001

3 Soede NM, "The duration of ovulation in pigs, studied by transrectal ultrasonography, is not related to early embryonic diversity" 38 : 653-666, 1992

4 Garner DL, "Spermatozoa and seminal plasma" 7 : 107-, 2000

5 Kemp B, "Relationship of weaning to estrus interval to timing of ovulation and fertilization in sows" 74 : 944-949, 1996

6 O'Grady JF, "Mating management of sows" 22 : 11-19, 1983

7 Xue J, "Influence of mating frequency on sow reproductive performance" 76 : 2962-2966, 1998

8 Knox RV, "Factors influencing estrus and ovulation in weaned sows as determined by transrectal ultrasound" 79 : 2957-2963, 2001

9 Bartol FF, "Epigenetic programming of porcine endometrial function and the lactocrine hypothesis" 43 (43): 273-279, 2008

10 Soede NM, "Effects of time of insemination relative to ovulation, as determined by ultrasonography, on fertilization rate and accessory sperm count in sows" 104 : 99-106, 1995

11 Dewey CE, "Associations between litter size and specific sow-level management factors in Ontario swine" 23 : 101-110, 1995

12 Flowers W, "An update on swine" 17-17, 1996