Fig. 2

Principal component analysis of hydrocarbon constituents on emerged and husk-encased silks across five heterotic groups. The first and second principal components (PC1 and PC2) are shown for silks analyzed at 3-days PSE from the 22 and 16 inbred lines grown in 2010 (a) and 2009 (b), respectively. Percentages represent the amount of variation explained by each principal component. Ellipses represent a 95% confidence ellipse for each heterotic group. No representatives from the Sweet Corn group were grown in 2009