Dae-Jin Kwon, Godfrey Bigirwa, Seok Ki Im, Hyun Kim, Hak-KyoLee, Ki-DukSong
언어
영어(ENG)
URL
https://www.earticle.net/Article/A347462
원문정보
초록
영어
A artificial insemination (AI) has been used in Uganda for over 60 years, but a small population of the total herd has been bred using this method and pregnancy rates among dairy farms is still low. This study was conducted to optimize the Ovsynch method for improving the productivity of dairy farms through AI services in Uganda. In total, 160 cows from 18 dairy farms were selected for timed-AI. Synchronization was performed according to Ovsynch protocol with low GnRH (0.15 mg) followed by AI using frozen semen from Korean Holstein (0.5 mL straws). The pregnancy rate in low GnRH group was compared with the previously reported results using normal GnRH (0.25 mg). The overall pregnancy rate in normal group was 28.2% (22 of 78), whereas that in low GnRH was 49.4% (79 of 160) (p<0.01). The previous report implied that low pregnancy rate in normal GnRH was caused by a high occurrence of abnormal estrus (54.5%, 30 of 55). Thus reducing the GnRH during Ovsynch could reduce a occurrence of abnormal estrus. Taken together, these results suggested that use of low GnRH during AI services could improve the productivity of dairy farms in Uganda.
Dae-Jin Kwon [ International Agricultural Development and Cooperation Center, Chonbuk National University, Jeonju 54896, Korea ]
Godfrey Bigirwa [ International Agricultural Development and Cooperation Center, Chonbuk National University, Jeonju 54896, Korea, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Uganda ]
Seok Ki Im [ International Agricultural Development and Cooperation Center, Chonbuk National University, Jeonju 54896, Korea ]
Hyun Kim [ TNT Research Co., Ltd., Jeonju 54810, Korea ]
Hak-KyoLee [ International Agricultural Development and Cooperation Center, Chonbuk National University, Jeonju 54896, Korea, Department of Animal Biotechnology, Chonbuk National University, Jeonju 54896, Korea ]
Ki-DukSong [ International Agricultural Development and Cooperation Center, Chonbuk National University, Jeonju 54896, Korea, Department of Animal Biotechnology, Chonbuk National University, Jeonju 54896, Korea ]