Principal component (PC) analysis of petal morphometry in standard carnation cultivars.

<p>(A) Petal shape by variation along the first four PCs of the carnation petal shape model, PC1 to PC4. The mean petal and petal shapes corresponding to PC values deviating by ±2 SD are shown. (B) Two-dimensional PC map generated by standard deviations from the mean petal along PC1 and PC2. The ellipses represent 1 SD from the mean petal for each one of the nodes (cultivars) shown.