TABLE 4.

Akaike information criteria (AIC) for the different models implemented.^a

Trait	PBLUP	GBLUP one-component					GBLUP two-component
		54K	54K + YSS	54K + DFS	54K + YSS + DFS	54K* + YSS + DFS + LET	54K + YSS	54K + DFS	54K + YSS + DFS	54K* + YSS + DFS + LET
YSS Index	−26.99	−45.18	−45.17	−45.16	−45.16	−45.13	−45.12	−45.14	−45.12	−45.10
BP1	−27.65	−39.86	−39.85	−39.84	−39.84	−39.82	−39.81	−39.82	−39.81	−39.79
BP2	−22.16	−44.98	−44.97	−44.96	−44.96	−44.93	−44.94	−44.95	−44.94	−44.91
HP1	−26.26	−40.75	−40.74	−40.73	−40.72	−40.70	−40.70	−40.70	−40.69	−40.67
HP2	−24.00	−44.96	−44.95	−44.94	−44.94	−44.91	−44.92	−44.93	−44.92	−44.89

^ax10³.

54K + YSS = Conventional 54K SNPs plus SNPs from GWAS on young stock survival (YSS_SNPs).

54K + DFS = Conventional 54K SNPs plus SNPs from GWAS on all traits in Nordic total merit index (DFS_SNPs).

54K + YSS + DFS = Conventional 54K SNPs plus YSS_SNPs and DFS_SNPs.

54K* + YSS + DFS + LET = Reduced 54K (minus SNPs in recessive lethal haplotypes), plus YSS_SNPs (YSS) and DFS_SNPs and the model considered random regression on genotype code of SNPs in recessive lethal haplotypes (LET_SNPs).

BP1, Bull period 1; BP2, Bull period 2; GBLUP, genomic best linear unbiased prediction; GWAS, genome-wide association study; HP1, Heifer period 1; HP2, Heifer period 2; PBLUP, pedigree-based best linear unbiased prediction; SNP, single-nucleotide polymorphism; YSS, young stock survival.