돼지의 3원교배종과 3 품종간윤환교배종의 자돈생산능력 비교 = Comparison of Three - way Crosses and Three - breed Rotational Crosses for Production of Piglets

다국어 초록 (Multilingual Abstract)

The results of comparison for reproductive performance of three-way crosses and three-bread rotational crosses produced at Livestock Experiment Station, are summarized as follows: 1. Number of born alive and number of weaned per Utter were non significant among mating groups, threebreed rotational crosses were superior to three-way crosses on D × LwL and H × LwL mating. The pigs in autumn, the 2-4th parities and the 2nd three-breed rotational crosses had larger litter size than. those of others. 2. Birth weight per head of three-way crosses and 1st three-breed rotational crosses were heavier than that of three-breed rotational crosses. The difference of year was significant at 5% level. 3. Weaning weights of three-breed rotational crosses and 2nd rotational crosses were heavier than that of three-way crosses in each mating groups. 4. Survival rate at weaning in 2nd three-breed rotational crosses, autumn and 2-4th parities were superior, respectively, than that of other characters.