Fig 1. Frequency distributions of physiological and morphological traits comparing the frequency of well-watered control (green dash-dotted lines) and drought stress (red plain lines) during both generative and vegetative stage treatments.

The vertical lines in the histograms show population mean values in control (green) and water deficit stress (red) conditions, and values in parentheses represent the percentage change (+, increase;–, decrease) in water-deficit conditions over the control. Levels of significance for genotype (G), treatment (T), and their interaction (GxT) effects from the linear mixed model are given in the graphs (***, P< 0.001; and ns, not significant).