Table 6 Selection response for sow productivity traits
Trait | Group | LSM | SE | P value |
|---|---|---|---|---|
Number piglets born (piglet/litter) | \({\text{C}}_{\text{M}}\) | 0.458 | 0.050 | < 0.0001 |
\({\text{H}}_{\text{M}}\) | 0.116 | 0.049 | 0.027 | |
\({\text{R}} = 2\left( {{\text{H}}_{\text{M}} {-}{\text{C}}_{\text{M}} } \right)\) | − 0.684 | 0.140 | < 0.0001 | |
Average piglet birth weight per litter (kg) | \({\text{C}}_{\text{M}}\) | − 0.025 | 0.005 | 0.0000 |
\({\text{H}}_{\text{M}}\) | − 0.023 | 0.005 | 0.0000 | |
\({\text{R}} = 2\left( {{\text{H}}_{\text{M}} {-}{\text{C}}_{\text{M}} } \right)\) | 0.005 | 0.014 | 0.735 | |
Standard deviation of piglet birth weight within litter (kg) | \({\text{C}}_{\text{M}}\) | 0.001 | 0.001 | 0.273 |
\({\text{H}}_{\text{M}}\) | − 0.003 | 0.001 | 0.0001 | |
\({\text{R}} = 2\left( {{\text{H}}_{\text{M}} {-}{\text{C}}_{\text{M}} } \right)\) | − 0.009 | 0.003 | 0.0007 | |
Piglet survival rate per litter at birth (%/litter) | \({\text{C}}_{\text{M}}\) | − 0.089 | 0.041 | 0.026 |
\({\text{H}}_{\text{M}}\) | 0.009 | 0.040 | 0.833 | |
\({\text{R}} = 2\left( {{\text{H}}_{\text{M}} {-}{\text{C}}_{\text{M}} } \right)\) | 0.195 | 0.114 | 0.087 | |
Piglet survival rate per litter during the nursing period (%/litter) | \({\text{C}}_{\text{M}}\) | − 1.023 | 0.113 | < 0.0001 |
\({\text{H}}_{\text{M}}\) | 0.285 | 0.112 | 0.007 | |
\({\text{R}} = 2\left( {{\text{H}}_{\text{M}} {-}{\text{C}}_{\text{M}} } \right)\) | 2.616 | 0.319 | < 0.0001 |