초록 ▼

III. 연구개발의 내용 및 범위
1. 고급육형 한우 선발을 위한 초음파 생체정보 이용 연구
○ 씨수소 선발모형 개발
○ 암소의 근내지방 발현양상 구명에 의한 암소선발 모형 개발
2. 한우 암소 비육우 고품질·생산성 향상 기술개발
○ 연령, 비육기간 및 체중별 산육 및 육질 변화 구명
○ 암소 비육 시 적정 배합사료 급여방법 구명
3. 한우 암소비육 유형별 사육기술 개발
○ 경산 암소의 비육유형별 산육, 도체특성 및 경제성 분석
4. 한우 암소고기의 도체 및 육질특성 조사 연구

III. 연구개발의 내용 및 범위
1. 고급육형 한우 선발을 위한 초음파 생체정보 이용 연구
○ 씨수소 선발모형 개발
○ 암소의 근내지방 발현양상 구명에 의한 암소선발 모형 개발
2. 한우 암소 비육우 고품질·생산성 향상 기술개발
○ 연령, 비육기간 및 체중별 산육 및 육질 변화 구명
○ 암소 비육 시 적정 배합사료 급여방법 구명
3. 한우 암소비육 유형별 사육기술 개발
○ 경산 암소의 비육유형별 산육, 도체특성 및 경제성 분석
4. 한우 암소고기의 도체 및 육질특성 조사 연구
○ 연령, 산차 조건에 따른 암소고기의 도체 및 육질 특성 구명
○ 암소고기의 맛관련 요인 도출 및 상관관계 분석
5. 한우 종축 탈락축 생산성 향상기술 개발
○ 후보종모우 탈락축에 대한 고급육생산 프로그램 적용 생산성 구명
6. 반추위 보호 영양물질 강화 최고급 한우고기 생산연구
○ 미경산 암소 비육시 성장단계별 발육, 혈액성상 및 사료이용성 구명
○ 출하시기별 도체특성 및 경제성 분석

Abstract ▼

The study of using ultrasound measurement traits on selection of high quality beef type in Hanwoo
This study was performed using ultrasound technology to check the possibility of the selection of the cows and the meat quality of bulls with superior ability. The current performance and progeny tes

The study of using ultrasound measurement traits on selection of high quality beef type in Hanwoo
This study was performed using ultrasound technology to check the possibility of the selection of the cows and the meat quality of bulls with superior ability. The current performance and progeny test require approximately 5.5 years to select bull but, ultrasound technology to allow testing period to reduce 3 years.
Ultrasound measurements of carcass traits at 30 months of age for the bull traits were backfat thickness of 5.4 mm, eye muscle area of 96.5 cm², marbling score of 2.5. In this study, marbling score over 4 grade appear 17.6% in bull, so that it could be increased of marbling score for bull with more proper management. As for the cow, when animals with marbling score 3 for 4 month fattening were flattened 6 months more, marbling score appeared 92% of 1^st grade. Specification management Forage oriented cow form a generally intramuscular fat deposition due to inadequate phenotypically difficult to select the excellent cow, if we select excellent cow with marbling score 3 for mating after four months fattening measured by ultrasound marbling, it would be very helpful for cow breeding scheme. As for the heifer, the pattern of marbling score deposition, marbling score was measured grade 2 at 22 months old and after 28 months old, it increased over grade 4 followed by increasing until 40 month old. Genetic parameters for ultrasound traits of cow were estimated that heritability for backfat thickness by ultrasonic measurement of the cows was 0.43, loin eye area, 0.23 and marbling 0.32. Heritability of carcass traits backfat thickness 0.33, loin eye area 0.13 and 0.33 marbling. As for the genetic correlation between the actual and ultrasound, backfat thickness showed very high: 0.97, loin eye area 0.94 and marbling score 0.92. The phenotypic correlation coefficients between ultrasound measurements and carcass measured values was the positive each other. The correlation between ultrasound measurements and actual carcass traits showed highly correlated in genetic and phenotype so that ultrasound measurement might be a breeding tools to select elite cow for cow breeding in Korea.
Development of technique for improving high quality and performance of Hanwoo beef cows
This study was conducted to determine the feeding pattern and fattening periods on growth performance and carcass characteristics of Hanwoo cows. This study were contained 3 experiments for 4 years feeding trial.
Experiment 1. This experiment was conducted to determine th fattening periods on Carcass characteristics and economic efficiency of Hanwoo cows. 56 Hanwoo cows were randomly allocated 3 groups(6, 8 and 10 months), which contained 18 animals. Final BW was no different between the treatments group by fattening periods. However, ADG was significantly lower than that of the 10 months group (p<0.05). The results of yield traits, carcass weight was significantly higher at the 10 months group than the 6 months group. In terms of quality traits, meat color, texture, and maturity were not significantly different between the three groups. However, marbling score and appearance rate of high quality grade (1⁺⁺, 1⁺, and 1) were higher in the 8 months group compared with the other groups. Thus, Hanwoo cows was greater at 8 month fattening group on growth performance and carcass characteristics.
Experiment 2. This study was to investigate the effects of growth performance, carcass characteristic and economic efficiency according to feeding patterns of concentrates in Hanwoo cows. Randomly-allocated groups, restricted feeding for 8 months (T1) without ad libitum, restricted feeding for 6 months with ad libitum 2 months(T2), restricted feeding for 4 months with ad libitum 4 months(T3), were contained with 9 animals. According to feeding patterns of concentrate, growth performance was not significantly different among the treatment groups. However, ADG tended to be high in T2 group (0.05 kg/d) compared to the other groups (T1: 0.62 kg/d, T3: 0.72 kg/d). The results of yield traits, yield index was significantly greater in T2 group compared to T1 group (p<0.05). Marbling score and appearance rate (%) of over 1st meat quality grade were tend to be increased at T3 rather (4.0, 56%) group compared with other groups (T1: 3.4, 56%; T2: 3.6, 33%). Hanwoo cows may be restricted concentrate feeding (1.6% of BW) for 4 months during early fattening periods and ad libitum feeding for 4 months of late fattening periods.
Experiment 3. This study was to determine the feeding managements of Hanwoo cows. 12 Hanwoo cows were randomly allocated to three concentrate feeding patten groups (T1: ad libitum 6 months, T2: restricted 4+ ad libitum 4 months and T3: restricted 10 months), which contained with 4 steers, respectively. DMI was greater T1 group compare other groups. The results of quality traits, marbling score was significantly greater in T3 group compared to other groups (p<0.05). In economic efficiency, income was higher T3 group more than other groups. The index was improved 59% in T3 group compared to the T1 group. According to the results on the growth performance, carcass characteristics and economic efficiency of Hanwoo cows, the feeding management may be appropriate restricted feeding of concentrate for 10 months.

목차 Contents

• 표지 ... 1
• 제출문 ... 2
• 요약문 ... 3
• SUMMARY ... 5
• 목차 ... 10
• 제1장 서론 ... 11
• 제1절 고급육형 한우 선발을 위한 초음파 생체정보 이용 연구 ... 11
• 제2절 한우 암소 비육우 고품질· 생산성 향상 기술개발 ... 12
• 제3절 한우 암소비육 유형별 사육기술 개발 ... 12
• 제4절 한우 암소고기의 도체 및 육질특성 조사 연구 ... 13
• 제5절 한우 종축 탈락축 생산성 향상기술 개발 ... 14
• 제6절 반추위 보호영양물질 강화 최고급 한우고기 생산 연구 ... 15
• 제2장 국내외 기술개발 현황 ... 17
• 제1절 고급육형 한우 선발을 위한 초음파 생체정보 이용 연구 ... 17
• 제2절 한우 암소 비육우 고품질· 생산성 향상 기술개발 ... 18
• 제3절 한우 암소비육 유형별 사육기술 개발 ... 19
• 제4절 한우 암소고기의 도체 및 육질특성 조사 연구 ... 19
• 제5절 한우 종축 탈락축 생산성 향상기술 개발 ... 20
• 제6절 반추위 보호영양물질 강화 최고급 한우고기 생산 연구 ... 20
• 제3장 연구개발수행 내용 및 결과 ... 22
• 제1절 고급육형 한우 선발을 위한 초음파 생체정보 이용 연구 ... 22
• 제2절 한우 암소 비육우 고품질· 생산성 향상 기술개발 ... 37
• 제3절 한우 암소비육 유형별 사육기술 개발 ... 58
• 제4절 한우 암소고기의 도체 및 육질특성 조사 연구 ... 63
• 제5절 한우 종축 탈락축 생산성 향상기술 개발 ... 95
• 제6절 반추위 보호영양물질 강화 최고급 한우고기 생산 연구 ... 97
• 제4장 연구개발목표 달성도 및 대외기여도 ... 107
• 제1절 목표대비 달성도 ... 107
• 제2절 정량적 성과 ... 108
• 제5장 연구개발결과의 활용계획 ... 113
• 제1절 고급육형 한우 선발을 위한 초음파 생체정보 이용 연구 ... 113
• 제2절 한우 암소 비육우 고품질· 생산성 향상 기술개발 ... 113
• 제3절 한우 암소비육 유형별 사육기술 개발 ... 113
• 제4절 한우 암소고기의 도체 및 육질특성 조사 연구 ... 113
• 제5절 한우 종축 탈락축 생산성 향상기술 개발 ... 113
• 제6절 반추위 보호영양물질 강화 최고급 한우고기 생산 연구 ... 113
• 제6장 연구개발과정에서 수집한 해외과학기술정보 ... 114
• 제7장 기타 중요 변동사항 ... 114
• 제8장 국가과학기술종합정보시스템에 등록한 연구장비 현황 ... 114
• 제9장 참고문헌 ... 115
• <참고> 주요 연구성과 요약 ... 130