우량한우 난자생검 유래 배반포 수정란 이식이 후대 유전체육종가에 미치는 영향 = The effects of embryo transfer on the genomic breeding values of offsprings using elite Hanwoo ovum pick-up technique

다국어 초록 (Multilingual Abstract)

Recent methods for producing high-quality Hanwoo (Korean beef cattle) frequently utilize elite cows as oocyte donors and result in superior calves using ovum pick-up (OPU), in vitro maturation (IVM), in vitro fertilization (IVF), and embryo transfer (ET) techniques. In this study, 13 male calves were produced over a 4?month period through ET and evaluated for growth performance and genetic breeding value. Body weights were monitored for 20 months. The genetic breeding values of the Hanwoo male offspring were in the top 11.33% for carcass weight, 14.01% for loin eye area, 48.45% for backfat thickness, and 17.11% for marbling score. Mean body weights at birth were not significantly different. However, at 6 and 15 months of age, values were 282.0±47.3 kg and 577.7±34.8 kg, respectively, for non-castrated bulls, and 236.6±27.8 kg and 475.0±33.7 kg, respectively, for castrated bulls, indicating that individuals selected based on genetic breeding values exhibited superior performance. These results demonstrate that embryo transfer technology utilizing elite cows provides an important means of genetically improving Hanwoo cattle and ensuring farm income.