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박동순,정선부,박홍양 ( D . S . Park,S . B . Chung,H . Y . Park ) 한국축산학회 1987 한국축산학회지 Vol.29 No.1
This study was conducted to estimate the heritabilities, genetic, phenotypic and environmental correlations among litter size, body weight at birth. weaning, daily gain and survival rate in swine. The data analysed were estimated on the basis of 4802 litters produced from 487 boars of Yorkshire, Hampshire, Duroc and Landrace raised at Duck-Won farm in Inchon from 1983 to 1985. The results obtained are summarized as follows: 1. The least square means over all litters studied were 9.86±0.10 pigs at birth, 8.24±0.10 pigs at weaning. 2. The least square means of body weight over all litters studied were 1.446±0.01㎏ at birth, 7,068±0.057㎏ at weaning. 3. The least square means over all litters studied were 0.188㎏ in daily gain, 85.1% in survival rate. 4. The estimates of heritabilities of litter size at birth and weaning, pig weight at birth and weaning, daily gain and survival rate were 0.286, 0.170, 0.110, 0.158, 0.183, 0.119, respectively. 5. Genetic correlation between litter size at birth and at weaning was 0.544, between body weight at birth and at weaning was 0.183 and between daily gain and survival rate was 0.026. 6. Phenotypic correlation between litter size at birth and at weaning was 0.493, between body weight at birth and at weaning was 0.163, and between daily gain and survival rate was 0.117. 7. Environmental correlation between litter size at birth and at weaning was 0.491, between body weight at birthand at weaning was 0.250; and between daily gain and survival rate was -0.040.