• Title/Summary/Keyword: Science experiment

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Strategies to Multiply Elite Cow in Hanwoo Small Farm

  • Lee, Seung Hwan;Kim, Ui Hyung;Dang, Chang Gwan;Aditi, Sharma;Kim, Hyeong Cheul;Yeon, Seung Heum;Jeon, Gi Jun;Chang, Sun Sik;Oh, Sung Jong;Lee, Hak Kyo;Yang, Bo Suk;Kang, Hee Seol
    • Journal of Embryo Transfer
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    • v.28 no.2
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    • pp.79-85
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    • 2013

  • The recent development in genetic assisted selection (combining traditional- and genome assisted selection method) and reproduction technologies will allow multiplying elite cow in Hanwoo small farm. This review describes the new context and corresponding needs for genome assisted selection schemes and how reproductive technologies can be incorporated to get more genetic gain for cow genetic improvement in Hanwoo. New improved massive phenotypes and pedigree information are being generated from commercial farm sector and these are allowing to do genetic evaluation using BLUP to get elite cows in Korea. Moreover cattle genome information can now be incorporated into breeding program. In this context, this review will discuss about combining the reproductive techniques (Multiple Ovulation Embryo Transfer; MOET) and genome assisted selection method to get more genetic gain in Hanwoo breeding program. Finally, how these technologies can be used for multiplication of elite cow in small farm was discussed.

  • https://doi.org/10.12750/JET.2013.28.2.79 인용 PDF KSCI

Efficacy of a Cue-Mate Intravaginal Insert and Injection of Prostaglandin $F_{a{\alpha}}$ for Synchronizing Estrus in Hanwoo Cattle

  • Cho, Sang-Rae;Kumar, Kuldeep;Yeon, Seong-Heum;Lee, Sung-Hwan;Kim, Ui-Hyung;Chung, Ki-Yong;Kim, Hyeon-Shup;Lee, Myeung Sik;Park, Chang-Seok;Yang, Byoung-Chul
    • Journal of Embryo Transfer
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    • v.29 no.4
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    • pp.321-325
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    • 2014

  • The present study was performed on farm animals to test the effectiveness of progesterone-releasing intravaginal device (Cue-Mate$^{(R)}$ 1.56 g) and injection of prostaglandin $F_{2{\alpha}}$ ($PGF_{2{\alpha}}$) for synchronization estrus in Hanwoo cattle. The cattle were at random stage of the estrus cycle. The cows were artificially inseminated at day 7 after Cue-Mate withdrawal, using commercial semen from Korean native bulls. There was a season effect on the estrus synchronization rate. It was higher in spring (94.3%) followed by winter (93.3%), autumn (90.4%) and summer (67.2%). In summary, The results of this study revealed that season has influences on estrus behavior of cattle with no significant effect on pregnancy rate. In summary, we suggest summer reproductive management to alleviate the effects of heat stress. It should be based on intensive cooling combined with hormonal treatment. Given that different subgroups of cows benefit differently from the treatments, selective hormonal administration should be considered.

  • https://doi.org/10.12750/JET.2014.29.4.321 인용 PDF KSCI