• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2005.10a
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• pp.122-123
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• 2005

• Proceedings of the Korean Society of Embryo Transfer Conference
• /
• 2005.10a
• /
• pp.130-130
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• 2005

• Proceedings of the Korean Society of Embryo Transfer Conference
• /
• 2005.10a
• /
• pp.131-131
• /
• 2005

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2003.10a
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• pp.86-86
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• 2003

• Proceedings of the Korean Society of Embryo Transfer Conference
• /
• 2006.10a
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• pp.44-45
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• 2006

• Proceedings of the Korean Society of Embryo Transfer Conference
• /
• 2004.10a
• /
• pp.32-32
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• 2004

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2000.11a
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• pp.46-54
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• 2000

Transgenic rabbits were produced by DNA microinjection using growth hormone receptor (GHR) and IGF-1 receptor (IGF-1R) genes. Overall efficiencies for production of transgenic rabbits were 3.2% and 3.1% in GHR and IGF-1R genes, respectively. Founder rabbits transmitted transgenes to their progenies through medelian fashion. Growth rate in GHR and ICF-1R transgenic rabbits was faster than non-transgenic rabbits. Transgenic rabbits grew larger (25% and 15% increase in body weight of GHR and IGF-1R transgenic rabbits, respectively) than non-transgenic rabbits and organ weight of transgenic rabbits increased, suggesting that GHR and IGF-1 genes affects growth rates in transgenic rabbits.

• Proceedings of the Korean Society of Embryo Transfer Conference
• /
• 2000.11a
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• pp.60-61
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• 2000

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2000.11a
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• pp.64-65
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• 2000

• Journal of Animal Reproduction and Biotechnology
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• v.34 no.2
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• pp.106-110
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• 2019

Sexed sperm can contribute to increase the profitability of the cow industry through the production of offspring of the craved sex, such as males for meat or females for dairy production. Therefore, the utilization of sexed sperms plays a very important role in the production of offspring of superior cattle. In this study, we examined the pregnancy rates and calves sexing proportion of male and female calves produced using AI, both performed using sexed and conventional sperm. In the result, the conception rates after ET were 73.3% (33/45) sexed semen and 52% (55/104) conventional semen. Thus, the sex ratio for sexed-semen inseminations was 70% (21/30) females for singleton births within a 272 to 292 day gestation interval. The sex ratio for conventional semen was 61% (34/56) females for births. As a result, it is suggested that the use of sex classification sperm will play a very important role in the offspring production of Korean bovine.