돼지의 번식형질에 미치는 품종 및 환경의 효과 = Effects of Breed and Environmental Factors on Reproductive Traits in Swine

다국어 초록 (Multilingual Abstract)

This study was conducted to determine the main effects of the breed, furrowing year, season and parity on gestation length, litter size and litter weight at birth, 21 days and 56 days in swine. The least square means were estimated on the basis of the data obtained from 1,551 litters of Landrace, Large Yorkshire, Hampshire and Duroc breeds raised at National Animal Breeding Institute from 1981 to 1985. The results are summarized as follows; 1 The breed mean of the gestation length was 115.28 days, and effects of breed. furrowing year, season and parity were nonsignificant. 2. The effects of breed, furrowing year, season and parity for litter size at birth were highly significant at 1% level, and Large Yorkshire breed was superior for litter size at birth than the other breeds. 3. The effects of breed, furrowing year, season and parity for litter size on suckling, 21 days and 56 days were highly significant at 1% level, and Landrace breed was superior for pig weight at birth, 21 days and 56 days than the other breeds. 4. The effects of breed, furrowing year, season and parity for pig weight on birth, 21 days and 56 clays were highly significant at 1% level, and Landrace breed was superior for pig weight at birth, 21 days and 56 days than the other breed. 5. The effects of breed, furrowing year, season and parity for litter weight on birth, 21 days and 56 days were highly significant at 1% level, and the litter size at birth, 21 days and 56 days were superior in Landrace, in spring and in 3rd parity.