## 3 Results
#### 3.1.4 Berry and Must Quality Parameters  
The analysis of technological berry quality (period 2018-2020) revealed that high-vigor clones had significantly higher berry weight (188, 94), total acidity (4), malic acid (4, 94, and 188) and a higher juice percentage (94) than low-vigor clones (Table 6). In contrast, high-vigor clones had significantly lower pH (94), IM (4), and tartaric/malic ratio (4, 94, and 188) than low-vigor clones. Moreover, the lowest productive and vigorous clone (360) also showed the lowest berry weight and juice % and the highest TSS, pH, and tartaric acid, compared to the rest of the clones (Table 6). There was also a significant effect of WS in most of the berry technological parameters (decreasing berry weight, pH, malic acid, and juice %, and increasing tartaric acid and tartaric/malic ratio), but this depended on the clone (Table 6). There were significant interactive effects (clone \(\times\) treatment) in berry weight (decreasing by WS in 372 and 276), pH (decreasing by WS in 188), malic acid (decreasing by WS in 360 and 188), and tartaric/malic ratio (increasing by WS in 360, 276, and 188). \begin{table}
\begin{tabular}{c c c c c c c c c c c c} \hline \hline  & & & & & \multicolumn{6}{c}{3-Year Period (2018-2020)} \\ \hline \multirow{2}{*}{**Clone**} & \multirow{2}{*}{
\begin{tabular}{c} **Vield** \\ **(gggggg  
Figure 9: Significant interactive effects of clone and irrigation treatment in yield (yield, no. clusters per vine, no. berries per cluster and WUE\({}_{\text{yield}}\)), vigour parameters (total leaf area), and sink-source ratios (TLA/yield, TLA/pruning weight). Values are the average of three years: 2018–2020. Arrows indicate the percentage of reduction with regards to their controls. Different letters indicate significant differences according to [PERSON]’s multiple range test at the 95% confidence level. In (**A**) and (**E**), we also did a unifactorial analysis (ANOVA) for each clone, looking for significant differences between control and stress treatment. ns, not significant. * \(p<0.05\); **\(p<0.01\); ***, \(p<0.001\), according to [PERSON]’s multiple range test at the 95% confidence level. Low-vigor clones also showed higher color intensity (373, 276, 360), seed maturity index, and tannins concentration (360) than high-vigor clones (94, 4) (Table 7). It is noted that high-vigor clone 188 had also a significantly higher polyphenol content compared to 94 or 372, and a similar polyphenol content than 360. Moreover, WS increased anthocyanins concentration in the must, compared to control, but this depended on the clone. Therefore, clones 372 and 94 under WS increased the concentration of total anthocyanins, and clone 360 under WS increased polyphenol content compared to their controls (Table 7). In addition, global berry quality indices (QI) calculated for the period 2018-2020 revealed that WS (compared to the control) significantly enhanced berry quality, regardless of the clone, but the improvement in QIoverall berry was greater in low-vigor clones (276 (48%) > 372 (25%) > 360 (24%) > 373(13%)) compared to high-vigor clones (188 (20%) > 94 (19%) > 4(10%)) (Table 8). Clone 360 increased mineral content in the must (K, Ca, Mg, P, B, Mn, and Zn) compared to the rest of the clones (Table 9). In contrast, high-vigor clones (94 and 188) had the lowest mineral concentration, especially for K, Ca, P, Zn in clone 94 and Mn and Zn in clone 188. In general, WS significantly increased the concentration of P and B and decreased Cu in the must compared to the control. In addition, significant interactive effects also showed that low-vigor clones 276 under WS increased Ca, Mn, P, Zn, 372 under WS increased Mg, Mn, and B and decreased Cu, and 360 and 373 under WS increased B and P, respectively, compared to their controls. In contrast, in high-vigor clones 188, 4, and 94, WS significantly decreased K, Mn, and P, respectively, compared to their controls (Table 9).