Principal component analysis (PCA) (Individuals factor map and variables factor map) displaying the variability of interspecific hybrids and parental species.

PCA based on biometrical parameters: plant height (PH), plant diameter (PD), fresh weight (FW), dry weight (DW), pollen quality (P) and flowering time (FT). The variables factor map presents the amount of variance from each parameter on the total variance in the PCA. When the arrow is longer, then the amount from the total variance is larger. a: Values examined from parental species CmP and CmD and CfB and CfW (‘Blue’ and ‘White’). A squared box is the average of values for each parental species and interspecific hybrid. The solid ellipse includes all Cf plants and interspecific hybrids when Cf was the maternal species (cycle a). The dashed ellipse includes all Cm plants and interspecific hybrids when Cm was used as the maternal species (cycle b); b: Values originated from parental species Cc, Ci and interspecific hybrids. Parental species and interspecific hybrids codes are provided in Table 1.