ROSS 육용계 품종의 성장능력 관련 유전자 발현 분석 연구

서지정보

ㆍ발행기관 : 경상대학교 농업생명과학연구원 ㆍ수록지정보 : 농업생명과학연구 / 47권 / 4호
ㆍ저자명 : 이지웅, 이명지, 김영신, 정승현

한국어 초록

본 연구는 국내 일반 사양환경에서 ROSS 육용계의 성장능력을 조사․분석하고, 사료효율을 고려한 도계의 적정시기를 산출하며, 도체성적을 분석하여 ROSS종 육계의 국내 활용 가능성을 검증하고, 성장관련 유용유전자를 발굴하여 조기선발을 위한 육종 전략을 수립하는데 목적으로 실시하였다. ROSS308 육계는 부분육 생산에 탁월한 능력을 지닌 품종으로 국외에서는 일반적으로 42일령에 도계를 실시하지만 국내에서는 55일령까지는 도계시기를 연장해도 좋지만 그 이후에는 사료효율이 저하되기 때문에 55일령을 도계시기로 선정하는 것이 바람직하다. 일반성장능력은 일당증체량이 83.4±10.4g, 사료섭취량은 4.5±1.4g, 출하체중은 4,833.2±570.7g, 정강이 길이는 9.36±5.4㎜, 가슴중량은 1,088.6± 125.0g, 넓적다리 중량은 864.8±86.9g으로 조사되었다. 초기 성장에서 능력이 저하되는 개체들은 조기 도태를 유도하여 계군 전체의 성장 능력 및 도체 성적을 개선할 수 있을 것으로 사료되며 이를 위하여 4개의 후보유전자인 TGFBR1, TGFBR1, IGF2, POUF1 등을 활용하여 조기선발을 유도하는 것이 유용할 것으로 사료된다.

영어 초록

The objectives of this study were to investigate a potential growth performance for body weight, feed intake, and feed efficiency in ROSS broiler breed and to measure carcass traits such as final weight, head weight, leg weight, shank length, gizzard weight, carcass weight, breast weight, drumstick weight, and dressed weight to provide the optimal slaughter day for the economic consideration of the producer, and to find informative candidate genes related to growth performance. A total of 100 ROSS308 broilers were reared initially, and body weight and feed intake were measured daily up to 57 days. After the slaughtering, carcass traits such as final weight, head weight, leg weight, shank length, gizzard weight, carcass weight, breast weight, drumstick weight, and dressed weight were measured. 20 candidate genes associated with growth in chickens were used to analyze differential expressed gene using quantitative real time PCR with breast and liver tissue. Average daily gain was 83.4 ± 10.4 g. Feed intake was 4.5 ± 1.4 g. Final weight was 4,833.2 ± 570.7 g. Shank length was 9.36 ± 5.4 mm. Breast weight was 1,088.6 ± 125.0g. Loin and drumstick weights were 168.6 ± 34.6 g and 864.8 ± 86.9 g, respectively. All ROSS broilers were divided into 4 groups based on the criteria for growth performance. Group four, the lower performance group, had a significantly lower average daily gain, average feed intake, and final weight than those of the other groups. Suggested slaughter age should be around 55 days of age due to worse feed efficiency and fail to endure standing. The genes such as TGFBR1 and TGFBR2 from liver and IGF and POU1F1 from breast were significantly expressed in heavy group. These results indicated that the selection or culling strategies in early age needed to improve fast growth performance and carcass traits for herds.

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