Additional file 6: Figure S4. of Genetic properties of the MAGIC maize population: a new platform for high definition QTL mapping in Zea mays

Structure in the MM population. A principal components (PC) analysis on MM founders genotypes is shown in panel a. PC one to five are shown, each square representing one founder with colors according to those given in Fig. 1. Two replicas for each founder are shown. As expected, PC loadings (and structure) for founders are higher than those of RIL. Panel b shows PC one to five for the MM lines. Breeding subfamilies are depicted in different colors. PC 1 provides a slight separation in two clusters, but the highest PC loading is of only 1.7%. The distribution of the PC loadings for PC 1–100 in the MM lines shows a smooth decrease throughout in panel c. Panel d reports the outcome of a discriminant analysis of principal components (DAPC) over the MM lines. The lowest BIC values are assigned to one-two clusters, confirming the absence of structuration in the MM population. (TIFF 3269 kb