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Table 5 Average accuracy of prediction of breeding values for log squared estimated residuals for a simulated trait *

From: Genetic and environmental heterogeneity of residual variance of weight traits in Nellore beef cattle

  

σ²Av ,exp = 0.01

σ²Av ,exp = 0.09

σ²Av ,exp = 0.25

Model

rmv

All

Sire

Dam

All

Sire

Dam

All

Sire

Dam

HOM

−0.5

0.11

0.20

0.05

0.25

0.50

0.12

0.29

0.63

0.14

(0.02)

(0.02)

(0.01)

(0.01)

(0.01)

(0.00)

(0.01)

(0.01)

(0.00)

HET

−0.5

0.11

0.23

0.05

0.26

0.57

0.11

0.30

0.70

0.14

(0.01)

(0.02)

(0.00)

(0.01)

(0.02)

(0.00)

(0.01)

(0.02)

(0.00)

HOM

0

0.16

0.20

0.07

0.26

0.47

0.12

0.31

0.64

0.15

(0.02)

(0.02)

(0.01)

(0.02)

(0.01)

(0.01)

(0.01)

(0.02)

(0.01)

HET

0

0.13

0.22

0.06

0.27

0.55

0.12

0.31

0.71

0.15

(0.01)

(0.02)

(0.01)

(0.02)

(0.01)

(0.01)

(0.01)

(0.01)

(0.01)

HOM

0.5

0.12

0.21

0.05

0.22

0.44

0.10

0.30

0.63

0.15

(0.02)

(0.02)

(0.01)

(0.02)

(0.02)

(0.01)

(0.01)

(0.01)

(0.00)

HET

0.5

0.12

0.23

0.05

0.23

0.53

0.10

0.30

0.70

0.14

(0.01)

(0.02)

(0.00)

(0.01)

(0.01)

(0.00)

(0.01)

(0.01)

(0.00)

  1. *Results given as mean (s.e.) of 20 replicates; accuracies were computed as Pearson’s correlations between estimated and true breeding values, by considering only the sires (sire), only the dams (dam) or all animals in the pedigree (all); results pertain to simulation using the observed pedigree structure; each scenario is characterized by the simulated values for additive genetic variance on residual variance (σ²Av,exp) and for the additive genetic correlation between the mean and the residual variance of the trait (rmv); homoscedastic (HOM) or heterogeneous residual variances among sire families (HET) were assumed in the model for the mean of the trait (first step of analyses).
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Genetics Selection Evolution

ISSN: 1297-9686