Table 1.

Scenarios based on choosing different phases of phenotypes for variance component estimation and average statistics of simulated datasets over 5 replicates

	Phenotyping periods (years)				No. of genotypes
Scenarioa	Conventional phase (1–20)	Genomic selection phase (21–35)	Size of pedigree	No. of phenotypes	Bulls	Cows with phenotype	Cows without phenotype
Pheno1	√	–	84,164	81,240	1050	–	–
Pheno1 + 2	√	√	160,131	144,728	8550	25,021	4979
Pheno2	–	√	106,011	63,487	8550	25,021	4979

^aPheno₁: phenotypes from only the conventional phase (1–20 years) were used; Pheno_1 + 2: phenotypes

from both the conventional phase and genomic selection phase (1–35 years) were used; Pheno₂:

phenotypes from only the genomic selection phase were used (21–35 years)