Effect of Syncro-Mate B Implants (SMB) on Embryo Production by Repeated Superovulation in Japanese Black Cattle

• DOCHI Osamu

  National Livestock Breeding Center Chugoku National Agricultural Experiment Station

• KONISHI Kazuyuki

  National Livestock Breeding Center National Liverstock Breeding Center, Oou Station

• IMAI Kei

  National Livestock Breeding Center

• TOMIZAWA Munetaka

  National Livestock Breeding Center Livestock Bureau of MAFF

• OKUCHI Hiroaki

  National Livestock Breeding Center Livestock Bureau of MAFF

• OKADA Masato

  National Livestock Breeding Center

• GOTO Yuji

  National Livestock Breeding Center

• TAKAKURA Hirosuke

  National Livestock Breeding Center National Liverstock Breeding Center, Iwate Station

Bibliographic Information

Other Title

• 過剰排卵誘起処置のSyncro-Mate Bを用いた反復が黒毛和種雌牛の胚回収成績に及ぼす影響
• カジョウ ハイラン ユウキ ショチ ノ Syncro-Mate B オ モチイ

Abstract

The purpose of this study was to evaluate the effect of repeated superovulation assisted by Syncro-Mate B implants (SMB) on embryo production in Japanese Black cattle. A total of 11 cattle were implanted s. c. with SMB in pinna and injected i. m. with 3mg of norgestomet and 5mg of estradiol valerate at the same time without considering stages of the estrous cycle. Six or seven days after SMB implantation, superovulation treatments were initiated with twice-daily injection of FSH with decreasing dosage manner for 4 days (total FSH 28AU). After 48h or 55h of the first FSH injection, all cattle were injected i. m. with 750μg cloprostenol. All cattle showing estrous behavior were inseminated artificially with frozen semen of Japanese Black bull. Six to eight days later, embryos were collected from uterus by flushing out. The embryo collection was repeated five times at an interval of 28 days. The repeated treatment of superovulation affected the proportion of transferable embryos (P=0.0117) and the number of transferable embryos (P=0.0501). The proportion of transferable embryos at 2nd treatment was significantly higher than that of the other treatment cycle (P<005). The number of transferable embryos after the 3rd treatment were significantly lower than that of the 1st and 2nd treatments (P<0.05). The average of the sum of oocytes/embryos, transferable embryos and good quality embryos were 45.2±25.0, 22.8±18.6 and 10.0±8.7, respectively. The response to superovulation treatment varies largely among individuals. The present study demonstrates that SMB can be effectively applied for embryo collection on repeated treatment of superovulation at an intervals of 28 days in cattle.

Journal

• Nihon Chikusan Gakkaiho

  Nihon Chikusan Gakkaiho 69 (4), 370-375, 1998

  Japanese Society of Animal Science

Keywords

• Repeated superovulation
• Superovulatory responses
• Syncro-Mate B
• Japanese Black cattle
• Embryo production

Details

• CRID: 1390001205196188544
• NII Article ID: 10021726428
• NII Article ID: 10020395653
• NII Book ID: AN00195188
• DOI: 10.2508/chikusan.69.370
• ISSN: 18808255
• ISSN: 00215309
• ISSN: 1346907X
• ISSN: http://id.crossref.org/issn/1346907X
• NDL BIB ID: 4471130
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4471130
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed