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Table 2 Model comparison for analysis of FCS using a likelihood ratio test

From: Plumage condition in laying hens: genetic parameters for direct and indirect effects in two purebred layer lines

  

Cage3

Classical4

Direct-indirect5

Line

Region

LR1

P (vs null2)

LR

P (vs cage3)

LR

P (vs classical4)

W1

Neck

604.0

< 0.001

64.8

< 0.001

16.3

< 0.001

 

Back

209.2

< 0.001

70.4

< 0.001

22.9

< 0.001

 

Rump

1025.4

< 0.001

8.5

0.004

11.5

< 0.001

 

Belly

326.2

< 0.001

105.2

< 0.001

4.1

0.128

 

Total

862.3

< 0.001

83.7

< 0.001

29.5

< 0.001

WB

Neck

1220.9

< 0.001

156.3

< 0.001

48.9

< 0.001

 

Back

1124.8

< 0.001

45.2

< 0.001

66.2

< 0.001

 

Rump

1698.9

< 0.001

57.7

< 0.001

66.6

< 0.001

 

Belly

401.0

< 0.001

55.8

< 0.001

15.4

< 0.001

 

Total

1565.2

< 0.001

132.8

< 0.001

90.7

< 0.001

  1. Model comparison was done for FCS in different regions of the body and for the total FCS in two lines (W1, WB); 1LR is the likelihood ratio test (LR is two times the difference in log likelihood between the complex model and the less complex model); 2null is a model without random effects; 3Cage is a model with only a random cage effect; 4Classical is a model with an additive genetic effect and a random cage effect (Equation 1); 5Direct-indirect is a model with both direct and indirect genetic effects (Equation 2).
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Genetics Selection Evolution

ISSN: 1297-9686