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Table 5 Estimates of phenotypic variance (Vp), residual variance (Vr), direct additive genetic variance (Vg), maternal genetic variance (Vm), common environmental effects within litter variance (Ve), of direct and maternal heritability (in italics on diagonal), and of genetic correlations (below diagonal) for traits at the piglet level

From: Genetic selection against intrauterine growth retardation in piglets: a problem at the piglet level with a solution at the sow level

 

HEAD CLASS

Ind BWT

V p

0.131 ± 0.001

119,480 ± 2290

V r

0.121 ± 0.001

86,549 ± 1761

V g

0.002 ± 0.002

8822 ± 2970

V m

0.004 ± 0.001

12,313 ± 3420

V e

0.004 ± 0.001

11,793 ± 2614

Direct heritability for HEAD CLASS

0.01 ± 0.007

 

Direct heritability for Ind BWT

− 0.90 ± 0.099

0.07 ± 0.024

Maternal heritability for HEAD CLASS

0.03 ± 0.009

 

Maternal heritability for Ind BWT

− 0.85 ± 0.077

0.10 ± 0.028

Direct evolvability

7.68%

0.42%

  1. HEAD CLASS = head morphology (score = 0 normal to 1 IUGR head morphology)
  2. Ind BWT = individual birth weight
  3. All standard errors (± SEM) are from a 2-variate model