The performances of three widespread ‘Nebbiolo’ clones, CVT 308, CVT 423 (Picotener biotype) and CVT 142 (Lampia Biotype) were evaluated to assess the influence of mountain environmental conditions on field performances and grape and wine quality. The clones were studied over two years (2003-04) comparing their behaviour in two vineyards set at Donnas (steep mountain area, dry and rocky soil with a pH of 6.2) and at Monforte d’Alba (hilly area, loamy and calcareous fresh soil with a pH of 8.1). The study was focused on agronomic and phenological parameters, grape quality, yield, berry skin polyphenolic composition and wine quality. The grapes underwent small-scale vinification; after stabilization, bottling and a six month rest, the 6 wines were sensory evaluated according to ranking and characterization tests as well as the wine composition were evaluated by chemical analysis. The aptitudes of the three clones reported in the National catalogue ranged from high (142) to low (423) vegetative vigour and yield. The clones with marked aptitudes (142 and 423) performed very differently depending on the sites of cultivation. In the more limiting environment of Donnas, the best response in terms of grape and wine quality were obtained from vigorous and yielding 142, whereas the low vigour and low yield clone 423 gave opposite results. The 308 showed an intermediate behaviour. Grapes grown in the mountain environmental conditions of Donnas generally showed a lower soluble solid content if compared to the ones produced at Monforte although they accumulated more anthocyanin, especially in the very hot and dry 2003. The wines from Donnas showed a lower alcohol content in both years, and during droughty 2003 the tannin content was higher than in wines from Monforte. The wines obtained from Picotener-biotype clones were preferred at Monforte, while the wines obtained from clone 142 (Lampia-biotype) grapes were preferred at Donnas. The results stress the importance of investigating the genotype-environment interactions in order to properly choose the suitable propagation material before establishing a new vineyard, overall when a high quality production is required.
Field performances and wine quality of three clones of Nebbiolo (Vitis vinifera L.) grown in two different environments of Northern Italy: Aosta Valley and Langhe
FERRANDINO, Alessandra;GUIDONI, Silvia;
2006-01-01
Abstract
The performances of three widespread ‘Nebbiolo’ clones, CVT 308, CVT 423 (Picotener biotype) and CVT 142 (Lampia Biotype) were evaluated to assess the influence of mountain environmental conditions on field performances and grape and wine quality. The clones were studied over two years (2003-04) comparing their behaviour in two vineyards set at Donnas (steep mountain area, dry and rocky soil with a pH of 6.2) and at Monforte d’Alba (hilly area, loamy and calcareous fresh soil with a pH of 8.1). The study was focused on agronomic and phenological parameters, grape quality, yield, berry skin polyphenolic composition and wine quality. The grapes underwent small-scale vinification; after stabilization, bottling and a six month rest, the 6 wines were sensory evaluated according to ranking and characterization tests as well as the wine composition were evaluated by chemical analysis. The aptitudes of the three clones reported in the National catalogue ranged from high (142) to low (423) vegetative vigour and yield. The clones with marked aptitudes (142 and 423) performed very differently depending on the sites of cultivation. In the more limiting environment of Donnas, the best response in terms of grape and wine quality were obtained from vigorous and yielding 142, whereas the low vigour and low yield clone 423 gave opposite results. The 308 showed an intermediate behaviour. Grapes grown in the mountain environmental conditions of Donnas generally showed a lower soluble solid content if compared to the ones produced at Monforte although they accumulated more anthocyanin, especially in the very hot and dry 2003. The wines from Donnas showed a lower alcohol content in both years, and during droughty 2003 the tannin content was higher than in wines from Monforte. The wines obtained from Picotener-biotype clones were preferred at Monforte, while the wines obtained from clone 142 (Lampia-biotype) grapes were preferred at Donnas. The results stress the importance of investigating the genotype-environment interactions in order to properly choose the suitable propagation material before establishing a new vineyard, overall when a high quality production is required.
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