Table 6.
Generic and variety-specific model estimates for berry juice titratable acidity level (g/L). DR_GS, DR_OF Growing season and October to February months diurnal ranges, respectively; DR_Jan, DR_Feb January and February diurnal ranges; Tmn_RP, Tmx_RP means of minimum and maximum temperatures during ripening period; D25_GS number of days with maximum temperature over 25 °C during growing season; Rad_Oct, Rad_Nov mean daily radiations in October and November (MJ/m2). Other details as in Tables 4 and 5
| Variety | Intercept | Climate variable | Model performance | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GDD_GS | DR_GS | DR_OF | DR_Jan | DR_Feb | Rn_GS | Tmn_RP | Tmx_RP | D25_GS | Rad_Oct | Rad_Nov | Adj_r2 | P.E. | VIFmax | ||
| Generic | 26.86*** | −0.00467 *** | −0.664 *** | 0.63 | 1.19 | 1.22 | |||||||||
| 25.56*** | −0.00771 *** | −0.0145 *** | 0.59 | 1.23 | 1.02 | ||||||||||
| 24.11*** | −0.00668 *** | −0.00335 *** | 0.59 | 1.25 | 1.07 | ||||||||||
| Cabernet Sauvignon | 19.0*** | −0.0052 *** | −0.0025 *** | 0.0073 *** | 0.85 | 0.49 | 1.14 | ||||||||
| 19.2*** | −0.003 *** | −0.389 *** | 0.77 | 0.57 | 1.20 | ||||||||||
| Chardonnay | 10.33*** | −1.1738 *** | −0.11147 *** | 1.038** | 0.87 | 0.89 | 3.29 | ||||||||
| 16.11*** | −0.0305 *** | −0.935 *** | 0.942** | 0.82 | 1.04 | 2.35 | |||||||||
| 36.56*** | −0.0066 *** | −1.058 *** | 0.81 | 1.10 | 1.22 | ||||||||||
| Shiraz | 17.61*** | −0.3048 *** | 0.70 | 0.93 | – | ||||||||||
| 13.34*** | −0.0034 ** | 0.0086 ** | 0.82 | 0.79 | 1.48 | ||||||||||
** P < 0.01, *** P < 0.001