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Table 3 Estimates of parameters obtained with the recursive intercept and linear reaction norm models for average daily gain of lambs with milk yield (dL) as covariate

From: No direct by maternal effects interaction detected for pre-weaning growth in Romane sheep using a reaction norm model

 

Intercept model

Reaction norm model

Δ(-2logL)

1.58

σ ϵ 1 2

18

18

σ v 2

35

35

σ ϵ 2 2

824

818

σ int 2

789

768

σ slope 2

 

126

ρ i ‒ s

 

-0.23 ± 0.30

ρ i ‒ v

0.47 ± 0.26

0.46 ± 0.27

ρ s ‒ v

 

-0.59 ± 0.94

β

3.9

3.9

  1. Δ(-2logL) : restricted likelihood ratio test = -2logLintercept_model + 2logLreaction_norm_model. σ ϵ 1 2 , σ ϵ 2 2 , σ v 2 , σ int 2 , σ slope 2 are the variances of the residuals for MY and ADG, of the additive genetic effect of the dam on MY, of the additive genetic effects of the lamb on the intercept and slope of the linear reaction norms, respectively. ρi ‒ s, ρi ‒ v, ρs ‒ v are the correlations between intercept and slope, intercept and maternal effects, slope and maternal effects. β is the regression coefficient.