Fig. 2

Scenarios used for training and validation for genomic prediction. Pink, purple, and blue colored rectangles represent each of the three genetic lines with pigs in both NVSL and KS06 trials, with the trial number indicated inside the rectangle. Gray colored rectangles represent individual genetic lines with only one trial of PRRSV infected pigs. Arrows indicate direction of genomic prediction, with the tail originating from the trials used in training and the head pointing towards the trial(s) used for validation. a Genomic prediction across PRRSV isolates using all data indicated by black arrows; across breeding company using both PRRSV isolates in training indicated by red arrows. b Genomic prediction across PRRSV isolate including validation breeding company in training indicated by purple arrow; genomic prediction across genetic line within PRRSV isolate and across genetic lines and isolate indicated by small and large blue arrows, respectively