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Table 1 Parameters of the simulation process

From: Maximizing crossbred performance through purebred genomic selection

Population structure

 

Step 1: Historical generations (HG)

 

Number of generations(size) - phase 1

1000 (2000)

Number of generations(size) - phase 2

1000 (gradual decrease)

Selection and mating

Random

Step 2: Breed formation (BF)

 

Number of founder males from HG

50

Number of founder females from HG

50

Number of generations

100

Number of offspring per dam

5

Selection and mating

Random

Step 3*: Expanded generations (EG)

 

Number of founder males from BF

100

Number of founder females from BF

100

Number of generations

8

Number of offspring per dam

10

Selection and mating

Random

Step 4: Purebred A0 and B0

 

Number of founder males/females from EG breed A

100/200

Number of founder males/females from EG breed B

100/200

Number of offspring per dam

5

Mating system

Random

Selection and mating

Random

Step 5: Purebred A and B

 

Number of males/females from A0

100/200

Number of males/females from B0

100/200

Number of offspring per dam

5

Selection

GEBV

Mating system

Random

Heritability of the trait

0.3

Phenotypic variance

1

Genome

 

Number of chromosomes

1

Number of SNPs

1000

SNP distribution

Random

Number of QTL

100

QTL distribution

Random

MAF of SNPs

0.05

MAF of QTL

0.05

Additive allelic effects for SNPs

Neutral

Additive allelic effects for QTL

Gamma

Rate of recurrent mutation

2.5 × 10−4

  1. *All of the individuals from the last generation of step 3 (Generation 8) was the training set.