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Table 3 Description of the variables used in the models for efficiency, performance and meat quality traits

From: Genetic analysis of protein efficiency and its association with performance and meat quality traits under a protein-restricted diet

Variable

Included in the model

Levels

Variable type

Univariate

Bivariate

Year of change

Yes

Yes

9

Fixed categorical

Slaughter weight (kg)

Yes

Yes

1

Fixed continuous

Slaughter age (days)

Yes

Yes

1

Fixed continuous

Temperature (°C)

Yes

Yes

1

Fixed continuous

Treatmenta

Yes

Yes

5

Fixed factor

Sex

Yes

Yes

3

Fixed factor

Animal

Yes

Yes

1071

Random factor

Sibshipb

Yes

Yes

197

Random factor

Interactionsc

Yes

–

  

Treatment:slaughter age

    

Year:slaughter age

    

Slaughter weight:sex

    

Treatment:sex

    
  1. aThe variable ‘Treatment’ was used only in the univariate and bivariate model of efficiency and performance traits (PE, phosphorus efficiency, ADG, FCR, ADFI)
  2. bThe variable ‘Sibship’ was used only in the univariate and bivariate model of efficiency and performance traits (PE, phosphorus efficiency, ADG, FCR, ADFI)
  3. cInteractions for meat quality traits differed depending on the top model selected for each meat quality trait
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Genetics Selection Evolution

ISSN: 1297-9686