Genetic and Phenotypic Correlation Estimates of Sow Reproductive Performance

Abstract

Study of genetic and phenotypic correlations of Large White, Landrace and Duroc sows at Chiangmai Livestock Research and Breeding Center were corrected from 1,569 litters. The environmental effects of breed, parity, season of birth and years were adjusted prior to estimation. Reproductive performance of Large White and Landrace sows were not significant difference (P> 0.05) in almost traits studied, only one traits on litter weight at birth of Landrace was heavier than Large White (P<0.01). In all traits of sow reproductive performance of Large White and Landrace were significantly higher than Duroc (P<0.01). Genetic correlations of number born alive with litter size at 3, 4, 5 and 8 weeks; litter weight at birth with litter weight at 3, 4, 5 and 8 weeks were 0.15, 0.16, 0.02 and 0.17; 0.38, 0.39, 0.28 and 0.38 respectively. Phenotypic correlations of number born alive with litter size at 3, 4, 5 and 8 weeks; litter weight at birth with litter weight at 3, 4, 5 and 8 weeks were 0.87, 0.86, 0.86 and 0.85; 0.66, 0.64, 0.61 and 0.63 respectively.