Fig. 4From: Repetitive DNA content in the maize genome is uncoupled from population stratification at SNP lociPopulation structure in the two heterotic groups of maize. In (a) the first two dimensions of a PCA analysis are used to describe the population structure as inferred by repeat content of the genome (i.e. abundance estimates of the clusters). In (b) PCA is used to infer population structure, but using genome wide SNP markersBack to article page