Hello everyone! I wonder if somebody could suggest me an article related or the solution to the following problem. I got phenotype data collected for the plant of interest for three years to run GWAS. For some samples phenotype data failed to pass Shapiro-Wilk test for normality so I want to use the median phenotype values instead of the mean values, however, I failed to find articles and/or tutorials where the similar approach have been used. If you faced such problem or know such articles please suggest!