Fig. 5

Epistatic QTLs. Phenotypic response of epistatic QTLs affecting freshwater growth in half-sibling families of Atlantic salmon. Significant gene-by-parent interactions, detected in all four datasets, demonstrate that the effect at a given allele was affected by the genetic background of the parents in the half-sib family. Selected examples from all four datasets; a, dataset 1; b, dataset 2; c, dataset 3 and; d, dataset 4