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(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.
