Terroir 1996 banner
IVES 9 IVES Conference Series 9 Clone performance under different environmental conditions in California

Clone performance under different environmental conditions in California

Abstract

Clonal evaluation of winegrapes in California has not been extensive. Early selection work by Alley (1977), Olmo (unpublished data) and Goheen (personal communication) resulted in the current collection of virus-tested clones in Foundation Plant Materials Service (FPMS) at the University of California, Davis. However, release of these certified selections was generally not accompanied by publication of viticultural performance or wine sensory attributes. A present day effort to characterize differences among clones of several cultivars has begun (Wolpert et al, 1995), with the objective of determining the viticultural and enological characteristics of winegrape clones. Research to date has centered on certified selections of Cabernet Sauvignon, Chardonnay, Pinot noir (for sparkling wine) and Zinfandel. In this paper, Cabernet-Sauvignon and Chardonnay performance will be examined in greater detail.

DOI:

Publication date: February 24, 2022

Issue: Terroir 2000

Type: Article

Authors

James A. Wolpert

Department of Viticulture and Enology
University of California
Davis, CA 95616

Tags

IVES Conference Series | Terroir 2000

Citation

Related articles…

Zonazione dell’area viticola doc durello

Il lavoro di zonazione riveste un ruolo importante per capire le potenzialità e la vocazionalità di una specifica area viticola. La viticoltura dovrebbe essere vista in funzione dell’obiettivo enologico che si vuole realizzare e quindi particolare importanza riveste il risultato delle vinificazioni delle uve provenienti dai vigneti delle diverse aree della zona di produzione oggetto d’indagine. La zonazione dell’area a DOC Monti Lessini Durello ha preso in esame la varietà “Durella”, vitigno autoctono del territorio, che rappresenta la maggior parte della produzione vitivinicola della zona.

The role of the environmental factor as a component of the terroir in Spain (A.O. Cigales, NW Spain)

The components and the methodology for characterization of the terroir in Spain have been described by Gómez-Miguel et al.

Early defoliation positively enhances bioactive composition of berries with no effect on cuticle characteristics

Leaf removal in the fruit-zone has been employed to improve cluster light exposure and ventilation and therefore increase metabolite accumulation and reduce botrytis incidence in berries. When applied before flowering (early defoliation – ED), it can also decrease cluster compactness and regulate yield in high-yielding varieties. This study aimed to evaluate the impact of ED on the physiology and metabolism of Aragonez (syn. Tempranillo) berries along the ripening period. The experiment was set up in 2013 at a commercial vineyard located in the Lisbon winegrowing region.

Shoot positioning: effect on physiological, vegetative and reproductive parameters

[English version below]

On a étudié durant deux saisons de croissance (2002/2003 et 2003/2004) l’effet de l’orientation vertical des rameaux sur les paramètres physiologiques, végétatifs et reproductifs dans la région de Stellenbosch dans un vignoble du cépage Merlot sur 99 R conduite à espalier et taillé a cordon coursonné. Les vignes étaient espacées 2.7 x 1.5 m. L’irrigation a été appliquée quand la baie avait la dimension d’un pois et a la véraison.

From the current probabilistic approach to a deterministic production process, a clear step towards digital transformation in the wine sector

Currently, to consistently ensure the maintenance of a wine-style while benefiting from the utmost rigor made possible by the winemaking process, the composition of the wine blend is made using sensory control. This is performed after the wine is made with no real possibility of deterministic intervention.