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Plot of the first two principal components in analyses of non-auto-correlated characters by cytotype. Principal components 1 and 2 accounted for 37 and 20% of the variance, respectively. Cytoplasm species clusters are circled. Z. mays cytotypes form a tight, discrete group with the inbred line at its approximate center. Cytotypes from Z. luxurians and from the perennial teosintes form another two dispersed but discrete groups.
