Summary
Content and composition of sugars of 259 grapevines including varieties, bred lines, rootstocks and wild species were determined. Wide variation existed in the sugar content. The sugar contents of varieties and bredlines were higher than those of rootstocks and wild species. The sugar components, fructose, glucose and sucrose were detected. Fructose and glucose were the primary sugars in approximately 1:1 ratio. Sucrose was present in a trace amounts, but two accessions of Vitis rotundifolia contained large amounts of sucrose. For the evaluation of the sugar composition, it was possible to discriminate clearly between high and low sucrose accessions by the ratio of glucose to fructose plus sucrose (α ratio).
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Shiraishi, M. Three descriptors for sugars to evaluate grape germplasm. Euphytica 71, 99–106 (1993). https://doi.org/10.1007/BF00023472
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DOI: https://doi.org/10.1007/BF00023472