젖소 공란우 과배란 처리 후 난소주기 재개에 관한 연구

서지정보

ㆍ발행기관 : 한국동물번식학회 ㆍ수록지정보 : Reproductive & developmental biology / 37권 / 1호
ㆍ저자명 : 손준규, 백광수, 윤호백, 임현주, 권응기, 조상래, 정연섭, 김선규, 최창용

목차

ABSTRACT 서론 재료 및 방법 공시우 공란우 과배란처리 및 인공수정 수정란 회수, 평가 및 초음파 검사 채혈 및 호르몬 분석 다양한 난소주기형의 정의 및 번식지표별 계산법 통계분석 결과 및 고찰 결론 인용문헌

영어 초록

The objective of this study was to investigate the effects of abnormal ovarian cycles after superovulation treatment of Holstein Donor Cows. CIDRs were inserted into the vaginas of twenty two head of Holstein cows, regardless of estrous cycle. Superovulation was induced using folliclar stimulating hormone (FSH). For artificial insemination, donor cows were injected with PGF2α and estrus was checked about 48 hours after the injection. Then they were treated with 4 straws of semen 3 times, with 12-hour intervals. Embryos were collected by a non-surgical method 7 days after the first artificial insemination. The cows were considered to have resumed ovarian cyclicity on the day of ovulation if followed by regular ovarian cycles. Seventy two point seven percentage of the cows(16/22) had normal resumption of ovarian cyclicity(resumption within 40 days after superovulation), and 27.3%(6/22) had delayed resumption(resumption did not occur until＞40 days after superovulation). Delayed resumption Type Ⅱ(first ovulation did not occur until ≥40 days after superovulation, i.e. delayed first ovulation 13.6%) were the most common types of delayed resumptions. The mean numbers of total ova from < 10 and 10≤ of corpora lutea(CL) was 7.8±1.8 and 12.7±2.7, respectively. The number of transferable embryos differed between < 10 and 10≤ CL was 5.4±1.3 and 8.1±3.4, respectively. Four point five percentage of the cows(1/22) did not resumption their ovarian cyclicity until 60 days after superovulation treatment. Diverse researches on the superovulation treatment method that is suitable for high-producing Holstein donor cows would contribute to preventing ovarian cyclicity disorder, as well as to the early multiplication of cows with superior genes by increasing the utilization value of donor cows.

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