title: Comparative study of maize cultivars 30 days after pollination (30 DAP): carbohydrates and protein.
abstract: 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.
authors.affiliation: Departamento de Ciência de Alimentos, Faculdade de Engenharia de Alimentos (FEA), Universidade Estadual de Campinas (UNICAMP), São Paulo, Brasil.
authors.forename: F G
authors.initials: FG
authors.lastname: Reyes
authors.forename: A M
authors.initials: AM
authors.lastname: Iguti
authors.forename: V C
authors.initials: VC
authors.lastname: Sgarbieri
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D004032:Diet; D004040:Dietary Carbohydrates / Q000032:analysis*; D005306:Fertilization; D009154:Mutation / Q000235:genetics; D009753:Nutritive Value; D010940:Plant Proteins / Q000032:analysis*; D003313:Zea mays / Q000032:analysis* / Q000145:classification / Q000235:genetics
chemical_list: D000596:Amino Acids; D004040:Dietary Carbohydrates; D010940:Plant Proteins