Additional file 1 of Genome-wide association mapping and genomic prediction analyses reveal the genetic architecture of grain yield and agronomic traits under drought and optimum conditions in maize

Supplementary Material 1: Supplementary Figure S1. Population structure analyses of 236 maize inbred lines based on 215,542 SNPs : (a) Evanno plot of the number of clusters (K) against delta K to determine the optimum number of K; (b) graphical representation of the 236 lines at K = 3 to K = 10. Each individual is shown as a vertical line divided into K colored segments, with segment lengths indicating the estimated probability of membership to each cluster.