Genetic variability in a grapevine progeny (Vitis vinifera L. cvs Grenache×Syrah) using reduced night-time transpiration as the target parameter

Abstract

[eng] Grapevine is one of the most important crops worldwide, but its sustainability is threatened by climate change. The rise in temperature and the decrease in rainfall reduce water availability in the Mediterranean region and plants experiment higher transpiration rates due to the planet warming. Hence, this study focuses in water relations and transpiration in plants, especially at night. Previous researchers found genetic differences in cultivar’s stomatal control (they show an isohydric or an anisohydric behaviour), then the cross between two cultivars with different behaviours results in a progeny with a high genetic variability. The aim was to identify genotypes with reduced night-time transpiration paired with high photosynthetic taxes in order to maintain the grapevine sustainability in the Mediterranean region in a climate change scenario