The loaded plots between the factors Z1 and Z2 are summarized
in Fig. 2a with a total cumulative proportion of up to 67% of the
variation. The plots are clearly divided by three groups, i.e.,
3G5G-, 3GX- and 3G-types of anthocyanins. The plot for the eigen-
vector of the non-acyl pigment pattern is not included in either the
groups for 3G5G- or 3GX-types (circled). The pigment patterns,
Cy3GaAcX (7) and Cy3GAcX (9) are also excluded from 3GX-types
of anthocyanins. It is interesting that the eigenvectors for pigment
patterns related to the Dp-types are included in the 3G-types of
anthocyanins, which imply that there are no groups for the Dp-
types of anthocyanins. Most of the acylated pigment patterns are
included in the 3G5G-types of anthocyanins excepting the E-Caf
pattern.