Accounting for genomic pre-selection in national BLUP evaluations in dairy cattle

Table 3 Quality of BLUP evaluations of young sires for udder depth after a 25% genomic pre-selection

Scenarios	Mendelian sampling estimate (in σ_g^d)	Bias (in σ_g^d)	True reliability	Mean square error
CONTROL	-0.001 (ns)	0.002 (ns)	0.756	0.183
GPS_no^a	0.304 (***)	-0.146 (***)	0.727	0.188
GPS_sel^b	0.188 (***)	-0.138 (***)	0.763	0.165
GPS_all^c	-0.003 (ns)	-0.019 (ns)	0.760	0.150

H0 = {μ = 0}: ns = non significant (p > 0.001); *** = p-value < 0.001; ^agenomic pre-selection of young sires but no inclusion of genomic pseudo-performances; ^bgenomic pre-selection of young sires and genomic pseudo-performances were included for selected young sires; ^cgenomic pre-selection of young sires and genomic pseudo-performances were included for all candidate sires; ^dgenetic standard deviation of the trait

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