WINETECH Technical Yearbook 2020

understanding the development and progression of flavours and the eventual implications thereof in wine style will serve as a valuable tool to Pinotage producers in day-to-day harvest decisions. REFERENCES Du Plessis, C.S. & Van Rooyen, P.C., 1982. Grape maturity and wine quality. South African Journal of Enology and Viticulture 3, 2, 41-45. Coetzee, B., 2018. PhD thesis: Genome and transcriptome sequencing of Vitis vinifera cv. Pinotage. Stellenbosch University. Hunter, J.J., Nadal, M. & Volschenk, C.G., 2007. Grape ripeness and wine style of Shiraz. Winetech Technical , November. Kriel, G.J. le R., 1983. KWV-Plantverbete­ ringskema: Watter kloon moet ek plant? Wynboer Technical Yearbook 2, January, 51-56. Marais, J. & October, F., 2005. Verband tussen drui fkleur en wynkwal i tei t . Winetech Technical 191, 15-17. Myburgh, P.A., 2011. Possible adjustments to irrigation strategy and trellis system to

management, vine frame and cordon height on viticultural and oenological performance of Pinotage in climate region 2. Wynboer Technical Yearbook 1, 1, 12-17. Van Schalkwyk, D. & Schmidt, A., 2009c. Cultivation of Pinotage in various climatic regions (Part 3): The influence of canopy management, vine frame and cordon height on the viticultural and oenological performance of Pinotage in climate region 3. Wynboer Technical Yearbook 1, 1, 18-24. Van Schalkwyk, D. & Schmidt, A., 2009d. Cultivation of Pinotage in various climatic regions (Part 4): The impact of canopy management, vine frame and cordon height on the viticultural and oenological performance of Pinotage in climate region 4. Wynboer Technical Yearbook 1, 1, 25-30.

improve water use efficiency of vineyards (Part 6): Yield and quality of Pinotage. Winetech Technical , June. OIV, 2017. 2017 World viticul ture situation. In: OIV Statistical Report on World Vitiviniculture , 1-20. SAWIS, 2017. SA Wine Industry 2017 Statistics 42, 1-31. Serra Stepke, I.M., 2014. Grapevine ( Vitis vinifera L., cv. Pinotage) responses to water deficit modulated by rootstocks. Stellenbosch University. Van Rooyen, P.C., Ellis, L.P. et al. , 1984. Interactions between grape maturity indices and quality for Pinotage and Cabernet Sauvignon wines from four localities. South African Journal of Enology and Viticulture 5, 1, 29-34. Van Schalkwyk, D. & Schmidt, A., 2009a. Cultivation of Pinotage in various climatic regions (Part 1): Climatic differences. Wynboer Technical Yearbook 1, 1, 7-11. Van Schalkwyk, D. & Schmidt, A., 2009b. Cultivation of Pinotage in various climatic regions (Part 2): The influence of canopy

& Van Rooyen, 1982; Van Rooyen et al. , 1984) assessed a wide range of ripeness levels (17-25°B), while nowadays vintners are picking in a narrower band at higher sugar levels. Internationally this trend has seen a major drive in grape compositional research and analyses in the search for improved ripening indicators and links to wine attributes. This field is unexplored for our most important local variety. Practical implications Research conducted locally on Shiraz displayed a strong relationship between progressive ripening and changes in wine style (Hunter et al. , 2007). This suggests that there are multiple “optimum ripeness” points during ripening, each associated with a specific style, contrary to the notion of a sole optimal point. This theory, however, remains uninvestigated for rapid ripening Pinotage. What is the possible scope of stylistic diversity? The ability/flexibility to manipulate wine style in the vineyard will allow producers to harness the potential of a given terroir, while also adhering to changing consumer preferences and market trends. Thus,

For more information, contact Etienne Terblanche at etienne@vinpro.co.za.

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