본 연구는 당대검정 한우 4,681두와 후대검정 한우 4,442두의 자료를 이용하여 한우 일당증체량을 통한 성장 특성과 유전력을 추정하고, 도체형질과의 유전상관을 알아보고자 수행하였다. 당대검정우에서 구한 6~9개월령, 9~12개월령, 6~12개월령 일당증체량의 평균과 표준편차는 각각 $1.04{pm}0.16$ kg, $1.11{pm}0.17$ kg, $1.07{pm}0.11$ kg이었으며, 6~9개월령과 9~12개월령, 6~9개월령과 6~12개월령, 9~12개월령과 6~12개월령 일당증체량의 표현형 상관이 각각 -0.03, 0.66, 0.65였다. 후대검정우에서 구한 6~12개월령 일당증체량과 도체중, 등심단면적, 등지방두께 및 근내지방도의 표현형 상관은 각각 0.446, 0.199, 0.0266 및 0.045였다. 6~12개월령 일당증체량, 도체중, 등심단면적, 등지방두께 및 근내지방도의 유전력은 각각 0.251, 0.298, 0.424, 0.503 및 0.626이었으며, 6~12개월령 일당증체량과 도체중, 등심단면적, 등지방두께 및 근내지방도의 유전상관은 각각 0.606, 0.292, -0.095 및 -0.007이었다. 본 연구로부터 일당증체량에 대한 개량으로 도체 중, 등심단면적 및 등지방두께에 대한 개량이 가능할 것으로 사료된다.
This study was conducted to identify the characteristics and estimate the genetic parameters of average daily gain (ADG) and carcass traits of Hanwoo. The data used in this study were 4,681 heads which were performance-tested and 4,442 heads which were progeny-tested in test station of National Agricultural Cooperative Federation. The means and standard deviations of ADG between 6~9 months (ADG:6-9), ADG between 9~12 (ADG:9-12) and ADG between 6~12 (ADG:6-12) from the performance test were $1.04{pm}0.16$, $1.11{pm}0.17$ and $1.07{pm}0.11$, respectively. The phenotypic correlations of ADG:6-9 and ADG:9-12, ADG:6-9 and ADG:6-12, ADG:9-12 and ADG:6-12 were -0.03, 0.66 and 0.65, respectively. The phenotypic correlations of ADG:6-12 with carcass weight (CW), eye muscle area (EMA), backfat thickness (BF), and marbling score (MS) from progeny test were 0.446, 0.199, 0.0266 and 0.045, respectively. Estimated heritabilities from the pooled data were 0.251 (ADG:6-12), 0.298 (CW), 0.424 (EMA), 0.503 (BF) and 0.626 (MS), respectively. Estimated genetic correlations of ADG:6-12 with CW, EMA, BF, MS were 0.606, 0.292, -0.095 and -0.007, respectively. From these results, it could be suggested that selection for ADG significantly affects CW, EMA and BF by correlated response to selection.
