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Contribution to the Clearing Up of Synonymies in Some Groups of Italian Grapevine Cultivars

Crespan, Manna, Cancellier, Severina, Costacurta, Angelo, Giust, Mirella, Carraro, Roberto, Di Stefano, Rocco, Santangelo, Salvatore
Acta horticulturae 2003 no.603 pp. 275-289
chemical analysis, computer software, cultivars, genes, genetic improvement, genetic markers, germplasm, grapes, vines, viticulture
Selection for genetic improvement in grapes has led to a reduction in the variability, a narrowing of the ampelographic range and the cultivation of many grape varieties being abandoned. In some cases it has been discovered that these grape varieties could be interesting sources of useful genes (for instance Gouais/Heunisch weiss) or when they are cultivated in suitable environments (for example Sauvignonasse/Tocai friulano). Genetic erosion therefore also regards viticulture and in recent times different institutions have financed projects devoted to the preservation and study of local germplasm. Moreover, for grapevines the problem exists of name redundancy with respect to the actual number of cultivars, which is, anyway, very high. Within this general framework, this paper offers a contribution towards the characterisation of local Italian grapevine germplasm, with the clearing up of the inevitable synonyms under which these vines are known in different geographical areas. Preliminary ampelographic comparisons suggested the hypothesis that the following groups of vines may be synonyms: 1. Prosecco lungo and Tocai nostrano 2. Aleatico, Vernaccia di Pergola and Moscatello nero 3. Bianchetta trevigiana, Vernassina, Vernanzina and Senese 4. Pedevenda and Verdise 5. Malvasia bianca lunga and Fresia 6. Ranaccio and Grenache For their characterisation we applied a multidisciplinary approach as follows: 1. ampelographic remarks with the O.I.V. fiche 2. ampelometric analysis with the Leaf-ISV software 3. GPI and PGM isozyme analyses 4. microsatellite DNA markers 5. chemical analyses of aromas The results and conclusions of each approach were integrated together and confirmed the initial feeling of identity for every group of accessions.