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Table 2 Estimated genetic parameters for piglet survival traits and birth weight analysed at the piglet level

From: Evaluation of direct and maternal responses in reproduction traits based on different selection strategies for postnatal piglet survival in a selection experiment

Effect Trait Genetic variance Direct Maternal
SVB SVNP IBW SVB SVNP IBW
Direct SVB 0.335 0.178* 0.225* 0.230* − 0.041 0.146 0.119
(0.13 to 0.23) (− 0.00 to 0.44) (0.11 to 0.35) (− 0.26 to 0.17) (− 0.05 to 0.34) (− 0.00 to 0.24)
Pr(h2 > 0) = 1.00 Pr(rg > 0) = 0.97 Pr(rg > 0) = 1.00 Pr(rg < 0) = 0.63 Pr(rg > 0) = 0.93 Pr(rg > 0) = 0.97
SVNP 0.287 0.069 0.184* 0.254* 0.165 – 0.152 0.137*
  (0.13 to 0.24) (0.14 to 0.37) (− 0.04 to 0.37) (− 0.33 to 0.03) (0.01 to 0.26)
  Pr(h2 > 0) = 1.00 Pr(rg > 0) = 1.00 Pr(rg > 0) = 0.94 Pr(rg < 0) = 0.95 Pr(rg > 0) = 0.98
IBW 0.091 0.04 0.04 0.358* 0.163* 0.149* – 0.047
   (0.32 to 0.40) (0.04 to 0.29) (0.03 to 0.27) (− 0.14 to 0.05)
   Pr(h2 > 0) = 1.00 Pr(rg > 0) = 0.99 Pr(rg > 0) = 0.99 Pr(rg < 0) = 0.83
Maternal SVB 0.261 − 0.015 0.045 0.025 0.140* 0.233* 0.175*
    (0.11 to 0.17) (0.07 to 0.40) (0.06 to 0.29)
    Pr(h2 > 0) = 1.00 Pr(rg > 0) = 1.00 Pr(rg > 0) = 1.00
SVNP 0.181 0.035 − 0.037 0.019 0.0507 0.117* 0.278*
     (0.09 to 0.14) (0.18 to 0.38)
     Pr(h2 > 0) = 1.00 Pr(rg > 0) = 1.00
IBW 0.075 0.019 0.020 − 0.004 0.024 0.032 0.294*
      (0.26 to 0.32)
      Pr(h2 > 0) = 1.00
  1. Estimates for piglet survival at birth (SVB), during the nursing period (SVNP) and individual piglet birth weight (IBW) are presented as posterior means of genetic variances, direct and maternal heritabilities h2 (on the diagonal), genetic correlations \({\text{r}}_{\text{g}}\) (above the diagonal) including their 95% highest posterior density interval (in parentheses), posterior probability of being positive Pr(. > 0) or negative Pr(. < 0) and genetic covariances (below the diagonal) using a Bayesian multivariate analysis at the piglet level
  2. *Significantly different from 0 (P < 0.05)
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