Table 4 Cross-pollination of Trebbiano Toscano and Nebbiolo with Corinto Nero pollen. Self-pollination was used as a control in the trial involving Nebbiolo
Variety | Year | Self-pollination | Cross-pollination with Corinto Nero pollen | |||
|---|---|---|---|---|---|---|
Inflorescences that set fruit | Berries and seeds | Inflorescences that set fruit | Berries | Seeds | ||
Trebbiano Toscano | 2012 | Not performed | Â | 3/24 | Several berries were observed at fruit set stage. However, at the end of the ripening season only a few berries were still present | Twenty-nine normal seeds were recovered, but none was able to germinate |
2013 | Not performed | Â | 2/9 | The two clusters had small berries | No seed | |
Nebbiolo | 2013 | 4/4 | The ripe clusters had 225 berries on average. Around 74% of the berries contained normal seeds (1.7 seeds per berry, 2.3 seeds per seeded berry on average) | 1/10 | The ripe cluster had 29 small berries | All the berries contained seeds (1.8 seeds per berry on average). Forty-nine seeds were recovered, but only two germinated |
2014 | 4/5 | The clusters had several berries | 0/3 | Â | Â | |