논문 ; 육종 번식 : 한우 송아지의 성장에 미치는 종모우군의 효과

To determine effects of sire group and sire`s birth year on body measurements of Korean native calves, the data set from 276 heads of Korean native calf raised at National Animal Breeding Institute from 1981 to 1990, was analyzed. The sire groups were subdivided into performance tested, championship contested, and general sire groups, respectively. The effects of sire`s birth years on the calves growth were significant in body length, withers height, chest width, hip width and thurl width at birth, and in body weight, body length, withers height, chest girth, hip width and thurl width at 6 months after birth. On the calves growth, the effect of the championship contested sire group was much more evident than those of the other sire groups. Body lengths and chest widths at birth and 3 months after birth fluctuated greatly by sire`s birth year. However, at 6 months after birth, the phenotypic gain of the all traits were distinctive.