Non Technical Summary
This research project will test the performance of clones of the major global cultivars and of new or previously neglected wine grape cultivars in the different wine grape growing regions within the U.S. This work will improve the competitiveness of U.S. grape growers and wineries by providing performance and quality information that is much needed for planting decisions.
Animal Health Component
Research Effort Categories
Goals / Objectives
Characterize the viticultural and wine quality potential of emerging cultivars based on regional needs.
Because of the range of climates, soils, and markets included in this project, specific protocols will require broad input from the cooperating experts and the statistician. This proposal only suggests the procedures which will be used to finalize vineyard and cellar protocols. The Guidance Committee will select cultivars for testing in this program. It will solicit suggestions from the wine industry and from technical experts. Examples of cultivars to be included are clones or cultivars with a documented history of production and value in wine production. Additional clones or cultivars may be included because they possess characteristics that may be of value to the industry. Cultivars and clones of potential economic value will be selected and grouped based on interest and need for various states and regions. Although not every item will be tested in every site, all items will be tested over a range of sites so that genotypic influences may be distinguished from environmental influence. All vines will be propagated from a single source. Vitis vinifera cultivars shall be grafted to a standard rootstock that is adapted to the site in question. In most cases 3309, 101-14, or Freedom rootstock will be suitable. Where phylloxera is not endemic, non-grafted vines will be included for comparison. Standard viticultural measurements will be collected each year at each site. Examples are: cane pruning weight, nodes retained at pruning, shoots per vine, shoot length, shoot weight, leaf area, yield per vine, clusters per vine, cluster morphology, berry weight, pest predation and disease status and cold hardiness. Vine phenology will be recorded. Berry sampling will be used to determine harvest date. After harvest, fruit sub-samples will be analyzed for juice soluble solids, pH, total acidity, color and organic acids (tartaric, malic, acetic). The guidance committee will specify the full compliment of components to be measured and the methods to be used. Wines will be produced with standard protocols developed by the guidance committee. Sufficient wine will be produced so that wines from different regions can be evaluated at several locations, and so that examples may be presented to stakeholders. Standard wine analyses, such as pH, TA, residual sugar, color, free/total SO2, malic, lactic, tartaric, and acetic acids, will be performed. The guidance committee will specify the exact components and methods to be used. Sensory analysis will be conducted regionally. Wines from each site will be evaluated at each testing center. Tasting methodology, wine descriptors, evaluator training and testing will be specified by the guidance committee. Sufficient wine will be produced so that presentations can be made to stakeholders in the various production regions. An expert in sensory analysis will be invited to join the technical committee.