Results for two quantitative traits dichotomized at the 50^th percentile.

Manhattan plots summarizing the genome-wide association study (GWAS) results for two quantitative traits dichotomized at the 50th percentile. Each trait was analyzed using both the unified mixed linear model (MLM) and the logistic mixed model (LMM). Quantile quantile (QQ)-plots depicting the observed (Y-axis) and expected (X-axis) −log(10) P-values are inserted into each Manhattan plot. The Manhattan plots on each graph shows the physical bp position of each tested SNP in either the maize B73_RefGen v2 reference genome (for A and B) or the sorghum Btx623 v2.1 reference genome (for C and D) on the X-axis; while the −log(10) P-values from either the unified MLM (A and C) or LMM (B and D) on the Y-axis. The vertical line on each graph indicates the approximate location of the peak marker-trait associations identified in the previously-published GWAS of the original quantitative trait. (A) Results for a GWAS on dichotomized α-tocopherol measured in maize grain using the unified MLM. (B) Results for a GWAS on dichotomized α-tocopherol measured in maize grain using the LMM. (C) Results for a GWAS on dichotomized sorghum plant height using the unified MLM. (D) Results for a GWAS on dichotomized sorghum plant height using the LMM.