Ampelometric characterization of presumed clones of the Greco di Tufo vine varieties and comparison with some standard varieties.

The present work is a contribution to the knowledge of the Campanian viticultural patrimony and, in particular, of the Greco di Tufo vine variety, one of the most interesting varieties from an ampelographic and oenological perspective. For ten presumed clones and six standard grapevine varieties, eighteen phyllometric parameters (giving 29 determinations) were measured for ten adult leaves. Data were statistically analysed to generate the similarity matrix and a dendrogram. The results obtained from the present work have indicated that, from an ampelometric point of view, the Greco di Tufo group appears clearly separated from the grapevine varieties chosen as standard. Moreover, among the Greco presumed clones some interesting ampelographic differentiations have emerged, permitting the distinction of two separate groups: presumed clones 1, 3, 4, 5, 8, and 10 and presumed clones 2, 6 and 7. Presumed clone 9 exhibited phyllometric characteristics, which differentiate it from the two groups. Important analogies in leaf shape have been confirmed in the present work, for example the well-known one between Pinot bianco and Chardonnay