Fig. 3. Principal components analysis of environments found across the distribution range of annual wild Cicer species (and C. anatolicum), based on climate, location, and altitude. Habitat types (Clusters 1 to 9) were defined using hierarchical and subsequent K-means clustering of PC1...PC4 scores (see Materials and Methods). Shaded areas represent germplasm currently stored in ex situ collections (see Fig. 2). Biplot vectors indicate strength and direction of factor loadings for PC1 and PC3. Plant developmental phases defined as indicated in Materials and Methods.