Reyes F G, Iguti A M, Sgarbieri V C
Departamento de Ciência de Alimentos, Faculdade de Engenharia de Alimentos (FEA), Universidade Estadual de Campinas (UNICAMP), São Paulo, Brasil.
Arch Latinoam Nutr. 1989 Mar;39(1):27-35.
A comparative study of the carbohydrates and protein of five maize cultivars at 30 days after pollination (DAP) showed a higher protein content for the Supersweet variety, and better protein quality for the Maya Opaque-2, Nutrimaiz, the Supersweet, and the Hybrid L90 x L41, when compared to the Maya Normal. The lipid content also proved to be higher in the four genetically-modified cultivars in relation to the Maya Normal. In contrast, the Maya Normal and the Opaque-2 were higher in starch content, lower in total and reducing soluble sugars, and exhibited only very small amounts (approximately equal to 1%) of phytoglycogen, a water-soluble polysaccharide. Nutrimaiz and the Hybrid L90 x L41 had approximately half the starch of the Maya Normal cultivar, but presented an appreciable content of phytoglycogen (23-26%), which is typical for sugary maize mutants, and a higher amount of soluble sugars, mainly sucrose, in relation to Maya Normal. The Supersweet had about half the starch content and a very high (approximately equal to 24%) amount of soluble sugars, mainly sucrose, in relation to the Maya Normal cultivar. The Supersweet also had a negligible amount of phytoglycogen. Nutrimaiz and the Hybrid L90 x L41 showed a much higher proportion of grain in the ears and, as a consequence, a higher yield of dry solids at 30 DAP, when compared with the Maya Normal cultivar.
一项对五个玉米品种授粉后30天（DAP）的碳水化合物和蛋白质的比较研究表明，与玛雅普通品种相比，超甜品种的蛋白质含量更高，而玛雅不透明-2、营养玉米、超甜品种和杂交种L90×L41的蛋白质质量更好。四个转基因品种的脂质含量也被证明高于玛雅普通品种。相比之下，玛雅普通品种和不透明-2品种的淀粉含量较高，总可溶性糖和还原可溶性糖含量较低，并且仅含有极少量（约等于1%）的植物糖原（一种水溶性多糖）。营养玉米和杂交种L90×L41的淀粉含量约为玛雅普通品种的一半，但含有相当可观的植物糖原（23%-26%），这是甜玉米突变体的典型特征，并且与玛雅普通品种相比，可溶性糖含量更高，主要是蔗糖。与玛雅普通品种相比，超甜品种的淀粉含量约为一半，可溶性糖含量非常高（约等于24%），主要是蔗糖。超甜品种的植物糖原含量也可以忽略不计。与玛雅普通品种相比，营养玉米和杂交种L90×L41的穗粒比例要高得多，因此在授粉后30天的干物质产量也更高。
