Table 1.

Description of the graft combinations analyzed.

Rootstocks	Genetic origin	Short name	Bunch weight/plant (Kg)	Yield/plant (Kg)	Vigour pruned wood/plant (Kg)
140 Ruggeri	V. rupestris × V. berlandieri	GAG-140R	0.26 ± 0.16a	2.12 ± 0.78ab	0.36 ± 0.19bc
1103 Paulsen		GAG-1103P	0.39 ± 0.15b–d	3.45 ± 1.51cd	0.66 ± 0.18de
17–37 Mgt		GAG-17-37	0.40 ± 0.09cd	3.54 ± 0.68cd	0.41 ± 0.05b–d
775 Paulsen		GAG-775P	0.41 ± 0.09cd	4.26 ± 1.96d	0.95 ± 0.33f
779 Paulsen		GAG-779P	0.38 ± 0.03b–d	2.87 ± 1.28a–d	0.44 ± 0.17c–e
110 Richter		GAG-110R	0.39 ± 0.08cd	1.92 ± 0.96ab	0.25 ± 0.06a–c
420 A	V. riparia × V. berlandieri	GAG-420A	0.30 ± 0.09a–c	2.11 ± 0.86ab	0.23 ± 0.10ab
SO4		GAG-SO4	0.49 ± 0.11de	3.69 ± 1.05cd	0.82 ± 0.32f
Kober 5 BB		GAG-KOB	0.31 ± 0.13a–c	2.34 ± 1.16a–c	0.43 ± 0.11b–e
Gravesac	161-49C (V. riparia × V. berlandieri) × 3309 C	GAG-GRAV	0.36 ± 0.09b–d	3.52 ± 0.98cd	0.65 ± 0.14de
3309 Couderc	V. riparia × V. rupestris	GAG-3309C	0.41 ± 0.09cd	3.28 ± 0.91b–d	0.41 ± 0.12b–e
Rupestris du Lot	V. rupestris	GAG-RUP	0.57 ± 0.11e	3.55 ± 1.13cd	0.68 ± 0.13e
41 B Mgt	V. vinifera (Chasselas) x V. berlandieri	GAG-41B	0.26 ± 0.0ab	1.45 ± 0.74a	0.13 ± 0.04a

The scion Vitis vinifera cv. “Gaglioppo,” Librandi CVT80 clone (GAG-) was grafted onto 13 different rootstocks. The combinations chosen for RNA-seq analyses are indicated in bold font. Grape weight and yield data collected at harvest and vine vigor are reported as average of the data collected in the 2014 and in the 2015 vintages. Letters indicating significant differences by Tukey's HSD-test (P < 0.05) are reported for each value. Data are expressed as mean ± SD (n = 3).