highly significant−log 10 ( P ) = 15.96
Initial mapping using an imputed genotype matrix for 2029 accessions (Togninalli et al ., 2018 ) revealed a highly significant peak associated with symptom score and total SA levels (−log 10 ( P ) = 15.96 and 10.64, respectively) spanning over 10 Kb on Chromosome 2 (Figs 1 , S2 for SA) and one marker reaching significance on Chromosome 3 (−log 10 ( P ) = 7.59) that is only associated with symptom score.