Skip to main content

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)