Maize is one of the most important sources of protein and starch for humans, however, low soil nitrogen may affect important grain quality traits. The objective of this study was to determine the chemical composition and pasting properties of 11 quality protein maize (QPM) hybrids with one non-QPM hybrid check, grown under optimal and low nitrogen stress conditions. Maize hybrids grown under low nitrogen compared to optimal environments had higher values of starch (56.71 and 54.50%), amylose (33.41 and 30.99%), β- (1.39 and 1.36%) and γ-zeins (68.53% and 53.78) as well as final (3004.56 and 1465.88 cP), setback (2110.48 and 1035.17 cP), trough (958.32 and 430.71 cP), breakdown (237.23 and 68.19 cP) and peak (1217.0 and 499.0 cP) viscosities. Lower amounts of protein (7.08% and 10.22) and α-zein content (29.94% and 44.96), as well as lower temperatures of pasting (50.89 and 51.21 °C) and peak time (5.89 and 6.91 min) of the pasting curves, were observed under low nitrogen conditions. The environment had a large effect on protein, viscosity and amylose content, while starch, zein and pasting temperature were largely determined by genotype.

玉米是人类最重要的蛋白质和淀粉来源之一，但土壤氮含量低可能会影响重要的谷物品质性状。本研究的目的是确定在最佳和低氮胁迫条件下生长的 11 种优质蛋白玉米 (QPM) 杂种的化学成分和糊化特性，其中一种是非 QPM 杂种检查。与最佳环境相比，在低氮环境下生长的玉米杂种具有更高的淀粉（56.71 和 54.50%）、直链淀粉（33.41 和 30.99%）、β -（1.39 和 1.36%）和γ-玉米醇溶蛋白（68.53% 和 53.78）以及最终（3004.56 和 1465.88 cP）、挫折（2110.48 和 1035.17 cP）、低谷（958.32 和 430.71 cP）、分解（237.23 和 68.19 cP）和峰值（1217.0 和 499.0 cP）粘度。较低量的蛋白质（7.08% 和 10.22）和α-玉米醇溶蛋白含量（29.94% 和 44.96），以及较低的糊化温度（50.89 和 51.21 °C）和糊化曲线的峰值时间（5.89 和 6.91 分钟），在低氮条件下观察到。环境对蛋白质、粘度和直链淀粉含量有很大影响，而淀粉、玉米醇溶蛋白和糊化温度很大程度上取决于基因型。