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Table 4 Validation of parent index (PI) and genomic breeding values (GBV) using French (FRA_ref) and EuroGenomic (EU_ref) reference populations

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

Trait French reference (3071 bulls) EuroGenomic reference (12078 bulls)
  RELPI NQTL b0g b1 RELGBV-PI RELPI NQTL b0g b1 RELGBV-PI
Protein yield 0.23 206 0.25 0.79 0.17 0.24 324 0.19 0.79 0.21
Udder depth 0.16 216 0.05 0.96 0.23 0.14 310 -0.07 0.98 0.35
SCS 0.33 214 0.02 0.96 0.27 0.33 304 -0.02 0.95 0.35
CR* 0.24 166 0.11 0.79 0.14 0.22 280 0.09 0.85 0.24
Average 0.24 201 0.11 0.88 0.20 0.23 305 0.05 0.89 0.29
  1. *CR: conception rate; 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: genetic standard deviation