## 2 Material and Methods
### Field Conditions, Plant Materials, and Irrigation Treatments
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline
**Phenological Period** & **Period of the Year** & **Eto (mm)** & **VPD (Gr)** & **Rain-Fall** & **T-max** & **T-med** & **T-min** & **Solar Rad.** \\  & & **(mm)** & **(Gr)** & **(mm)** & **(°C)** & **(°C)** & **(°C)** & **(W m\({}^{-2}\))** \\ \hline Budburst-fruit set & 15 April–14 June & 280 & 1.06 & 119 & 24.2 & 16.9 & 8.6 & 280 \\ Fruit set-version & 15 June–31 July & 280 & 2.04 & 1.4 & 32.9 & 24.5 & 14.2 & 313 \\ Verasion-Barrovest & 1 August–20 September & 219 & 1.43 & 170 & 30.5 & 23.3 & 15.7 & 234 \\ Postharvest & 21 September–31 October & 95 & 0.79 & 39 & 25.0 & 16.9 & 9.3 & 180 \\ Dormarcy period & 1 November–14 April & 261 & 0.45 & 289 & 16.7 & 9.34 & 2.75 & 133 \\ Total/annual average & & & & & & & & \\ Year 2020 & & 1135 & 1.15 & 618 & **25.9** & **18.2** & **10.10** & **228** \\ Budburst-fruit set & 15 April–14 June & 255 & 1.06 & 27 & 25.1 & 17.7 & 9.3 & 264 \\ Fruit set-version & 15 June–31 July & 266 & 1.92 & 6 & 33.2 & 24.6 & 14.4 & 316 \\ Verasion-harvest & 1 August–20 September & 231 & 1.71 & 6 & 32.2 & 23.5 & 13.8 & 258 \\ Postharvest & 21 September–31 October & 99 & 0.99 & 9 & 24.5 & 15.2 & 5.8 & 181 \\ Dormancy period & 1 November–14 April & 261 & 0.45 & 233 & 16.6 & 9.0 & 2.2 & 135 \\ Total/annual average & & & **1112** & **1.23** & **281** & **26.3** & **18.0** & **9.10** & **231** \\ Year 2021 & & 15 April–14 June & 253 & 0.94 & 113 & 24.3 & 17.1 & 9.2 & 259 \\ Budburst-fruit set & 15 June–31 July & 247 & 1.75 & 53 & 32.1 & 23.8 & 13.8 & 306 \\ Version-Barrovest & 1 August–20 September & 206 & 1.63 & 3 & 32.3 & 24.1 & 15.5 & 234 \\ Postharvest & 21 September–31 October & 94 & 0.79 & 16 & 24.8 & 17.2 & 10.05 & 162 \\ Dormarcy period & 1 November–21 March & 173 & 0.48 & 201 & 16.2 & 8.06 & 0.80 & 120 \\ Total/annual average & & & **973** & **1.12** & **386** & **25.94** & **18.05** & **9.87** & **216** \\ \hline \hline \end{tabular}
\end{table} 
Table 1: _Cont._  
Figure 1: (**A**). Experimental vineyard showing Monastrell vines from clone 373 under control treatment in July 2020. (**B**). Monastrell vines from clone 360 under water stress in July 2020. (**C**). Monastrell vines from clone 4 under water stress in July 2020. (**D**). Monastrell vines from clone 372 under water stress in July 2020.  
from the fruit set to the end of the cycle (Stress treatment, Table 2). All of the clones of each treatment were irrigated with similar annual water volumes, applying the same control and DI strategy from 2018 to 2020 (Table 2). In 2021, irrigation was optimized in each clone according to the physiological and agronomic results obtained in the three previous years, and a different annual irrigation water volume was applied to each clone (Table 2). The amount of water applied in the orchard was measured with flow meters (model MFSM-L, Hidroconta, Murcia, Spain). Water was applied by one pressure-compensated emitter per plant (2 L h\({}^{-1}\)) with one drip-irrigation line per row. All of the clones received the same annual amount of organic fertilizer (liquid organic matter-amino acid complex/compost, 50 L ha\({}^{-1}\) month\({}^{-1}\)), supplied through the irrigation drip system from April to August. In the stressed vines, fertilizer was applied directly into the soil when irrigation was cut. A completely randomized design was used in the vineyard with two factors: Clone (7 clones) and Irrigation conditions (control and stress treatments), with 15 repetitions per combination. Therefore, each clone had 15 control vines and 15 stressed vines arranged in the same trellis row (Figure 1). Due to its small size and to the high soil homogeneity (there were no significant differences in soil characteristics, such as texture, organic matter, pH, or cation exchange capacity), the experimental design was elaborated without repetitions of complete blocks. To cut off irrigation in plants with stress treatment, a key in the drip line was provided to open or close when irrigation or drought had to be applied.