Crosses were made between BH-1146, a tall wheat standard cultivar and tolerant to toxic effects of aluminum and sensitive to iron and manganese excessive levels, and Siete Cerros, a semidwarf cultivar and sensitive to aluminum and tolerant to iron and manganese toxic effects. Seedlings of this cross, in F2 generation, were selected for aluminum tolerance (10 mg/l) using nutrient solutions. Tolerant plants were transplanted to pots into a screenhouse. Selections of tolerant plants for aluminum, iron and manganese were made from F3 to F6 generations using distinct nutrient solutions with 6 mg/l of Al3+, 600 mg/l of Mn2+ and 10 mg/l of Fe2+. Twenty three inbred lines were obtained and evaluated with the cultivars BH-1146 and Siete Cerros in three experiments, using nutrient solutions. In the first experiment, the following levels of Al3+ were used: 0, 2, 4, 6, 8 and 10 mg/l; in the second experiment, the following levels of Mn2+ were used: 0.11; 300; 600 and 1,200 mg/l; and in the third experiment, Fe2+ was used at: 0.56; 5; 10 and 20 mg/l. The results permitted to confirm that selected inbred lines presented simultaneous tolerance to aluminum, manganese and iron toxicities.
wheat; inbred lines; cultivars; root length; aluminum; manganese and iron toxicities; tolerance; sensitivity