Fig. 4

Additive genetic relationship of SAP/CAP accessions based on the top 5% and bottom 5% rankings for β-carotene BLUP estimates and allelic diversity surrounding marker trait association. A Accessions plotted according to the first two principal components for sorghum kinships coded by country of origin and ranking for β-carotene BLUP estimates. B Nucleotide diversity of the region 1 Mb upstream and downstream of marker S06_47123508. The gray and orange lines represent nucleotide diversity for the bottom and top 5% rankings for β-carotene BLUP estimates, respectively. The black line represents the nucleotide diversity for all of the accessions in the SAP/CAP collections. The red dashed line represents the start position for the ZEP gene