A. Monaco’s research while affiliated with University of Naples Federico II and other places

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.

An identification and characterization study of different Aglianico genotypes (A. del Vulture, A. di Taurasi, A. Amaro, Aglianico di Napoli, A. di Galluccio) was carried out. The main purpose of this study was to identify leaf ampelometric and ampelographic features that can make procedures easier and results more effective and to measure the nuclear DNA by Flow Cytometry in order to describe the differences in genome size observed between five Aglianico genotypes. Application of cluster analysis on ampelographic parameters allowed tree groups: the first consisted of the genotypes A. del Vulture, A. di Taurasi and A. Amaro; the second of A. di Napoli; the third of A. di Galluccio. Cluster analysis applied to the ampelometric parameters shows only two groups: the first of A. del Vulture, A. di Taurasi and A. Amaro; the second of A. di Napoli and A. di Galluccio. Five genotypes displayed a characteristic DNA content measured by Flow Cytometry. The DNA content varied between 0.580 (A. Amaro) and 0.861 (A. del Vulture) pg/nucleus, accounting for a difference of ca. 33%.