Assessment of the Phenological and Ampelographic Variability of Grapevine Genetic Resources

The study evaluated the phenological and morphological diversity of several varieties from the germplasm collection at INCDBH Ștefănești. We analyzed phenology between 2023 and 2025 using the BBCH scale, while assessing morphological traits based on 41 OIV descriptors. Statistical analyses included PCA and hierarchical clustering. Phenological stage durations ranged from 153.0 to 159.2 days, with significant annual variation. The first two PCA components accounted for 70.34 % of the phenological variability, and 68.3 % of the OIV descriptors exhibited variability. The results highlight the value of this collection for theconservation of genetic resources and for grapevine breeding.