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Table 2 Validation of parent index (PI) and genomic breeding values (GBV) using German (DEU_ref) and EuroGenomic (EU_ref) reference populations

From: A common reference population from four European Holstein populations increases reliability of genomic predictions

Trait Number of bulls German reference EuroGenomic reference
  DEU ref. DEU val. EU ref. EU val. RELPI b0g b1 RELGBV-PI RELPI b0g b1 RELGBV-PI
Protein yield 3676 463 14475 1075 0.32 .29 0.83 0.28 0.32 .15 0.89 0.30
Udder depth 3672 454 14371 1048 0.22 -.08 0.97 0.26 0.20 -.16 1.01 0.45
SCS 3676 445 14479 1028 0.33 .04 0.83 0.26 0.33 .02 0.94 0.41
NRR 3676 314 14318 892 0.18 -.08 0.91 0.04 0.22 .11 0.91 0.14
Average 3675 419 14411 1011 0.26 .08 0.89 0.21 0.27 .03 0.94 0.32
  1. RELPI: r2(PI, DRP)/RELDRP, DRP is deregressed proofs in the validation dataset, RELDRP is the average reliability of DRP; RELGBV-PI : the difference between RELGBV and RELPI, where RELGBV is r2(GBV, DRP)/REL(DRP); b0 is intercept and b1 is regression coefficient of DRP on GBV; σg is the genetic standard deviation