Strategy of identification of candidate genes for WHC. Genes rated present after normalization were included in the statistical analysis. Both expression and phenotype data were adjusted using the general linear model before performing Pearson correlation analysis. Genes with trait correlated expression were included in the eQTL analysis. Genes with significant eQTL were assigned cis regulated if the genes' position matches the position of its eQTL, others were considered trans regulated. Also the position of the genes relative to QTL for drip was taken into account.