Fig. 5.

Distribution of genetic variation in ecological and maize biogeographic regions in Mexico. a) Ecological group of sampled accessions as in Ruiz Corral et al.[29], numbers refer to mean seasonal rainfall (mm); b) Sampling over the maize biogeographic regions of Perales & Golicher [21]; and, c) PCA showing the first two components (left) and neighbor joining trees (right) colored by ecological group (top) and maize biogeographic region (bottom). Teosintes are not shown in the PCA. The ecological group for some samples is missing, those samples are not colored but their tree branches are shown.