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Table 5 Biases of genomic predictions for average daily gain (ADG) and feed conversion ratio (FCR) in different validation groups for univariate (UNI) or bivariate (BI) single-step genomic prediction models with or without metafounders (MF), each with their optimal weighting factor (ω) in the two populations

From: Single-step genomic evaluation with metafounders for feed conversion ratio and average daily gain in Danish Landrace and Yorkshire pigs

Population

Trait

Validation group

UNI_SSGBLUP

UNI_MF-SSGBLUP

BI_SSGBLUP

BI_MF-SSGBLUP

Landrace

ADG (ω = 0.20)

All

0.960

0.989

0.945

0.962

Genotyped

0.733

0.739

0.732

0.738

Non-genotyped

0.838

0.839

0.829

0.828

FCR (ω = 0.70)

All

0.824

0.871

0.923

0.931

Genotyped

0.542

0.479

0.565

0.524

Non-genotyped

1.078

1.283

0.764

0.881

Yorkshire

ADG (ω = 0.25)

All

0.999

0.991

1.006

1.002

Genotyped

0.743

0.742

0.750

0.760

Non-genotyped

0.867

0.866

0.870

0.886

FCR (ω = 0.10)

All

1.004

1.012

1.006

1.008

Genotyped

0.472

0.488

0.483

0.502

Non-genotyped

1.006

0.996

1.005

0.999

  1. The four methods are UNI_SSGBLUP, UNI_MF-SSGBLUP, BI_SSGBLUP and BI_MF-SSGBLUP
  2. Validation groups are the validation population including all the young pigs born between 1 May 2016 and 1 February 2017, and two subgroups of genotyped and non-genotyped animals
  3. The results for ADG and FCR for bivariate single-step genomic prediction models are obtained with their optimal ω respectively