Fig 6.

Redundancy Analysis (RDA) ordination diagram displaying the relationships between the (i) Chl a fluorescence measurements and parameters and (ii) genetic, genotypic diversity and chlorophyll content in leaves. The first two RDA axes explained of 28.9 and 24.8% of variation in the data respectively. The classification of Chl a fluorescence parameters were performed with k-means clustering. The optimal number of groups (3) was estimated based on Caliński-Harabasz criterion. The result of classification was superimposed onto the ordination diagram. The ellipses represent 95% confidence intervals for the groups.