Figure 4. Plot of Principal Component Analysis (PCA) of the major Vicieae specimens.

The plot shows analogies and differences between the faba bean from el-Wad (), those from Ahihud, Nahal Zippori and Yiftahel (▲) and modern wild species native to Western Asia (○). The letters_a and_b are used to distinguish different seed and hilum outlines, within the same species. PCA axes 1 and 2 account for 65% of the cumulative variance. PCA axes represent respectively, the seed outline and the hilum relative length. For details, see Supplementary Table S3. Data for the modern species are from Zohary¹⁷, Gunn²⁰ and Perrino et al.²¹. The plot was obtained using XLSTAT.