돼지의 繁殖能力에 对한 結合能力, 母體效果 및 相反交雜効果 推定에 關한 硏究

Estimation of Combining Abilities, Maternal and Reciprocal Effects on Reproductive Traits in Swine

This study was conducted to estimate combining abilities, maternal and reciprocal effects for reproductive traits in swine. Data obtained from the litters of Duroc, Landrace, Yorkshire and Hampshire breeds were analysed. The least-square means and standard errors for pig weight at birth and 21 days of age, litter sizes at birth and 21 days of age, and liveability were 1.25±0.013㎏, 4.92± 0.027㎏, 10.29±0.074 heads, 8.55±0.089 heads and 84.48±1.028%, respectively. The variance components for pig weight at birth and 21 days of age were largely due to breed difference, reciprocal effect and general combining ability. The variance components for litter size at birth and 21 days of age were resulted from nonadditive genetic variance (specific combining ability and heterosis) and reciprocal effect. Particulary specific combining ability was most important factor for litter size at birth and maternal effect was most important in percentage survival. In addition to this, specific combining ability and reciprocal effect were also important for this trait.