Twenty three inbred lines showing at the same time tolerance to A1(3+), Mn2+ and Fe2+ toxicities, originated from the cross between 'BH-1146' (tolerant to Al3+ toxicity and sensitive to Mn2+ and Fe2+ toxicities) and 'Siete Cerros' (sensitive to Al3+ and tolerant to Mn2+ and Fe2+ toxicities), and the two cultivars used as parents were evaluated in four trials carried out in acid soils, at Itararé (1990-92) and Capão Bonito (1992) Experimental Stations and in five trials carried out in limed soils, at Campinas (1990-92) Experimental Center and in a private farm located in Cruzália (1990-91). The following parameters were assessed: grain yield, agronomic characteristics and disease resistance. Twenty inbred lines and 'BH-1146' presented greater grain yield than 'Siete Cerros' in acid soils indicating that Al3+ toxicity was one of the main factors limiting yield. In limed soils, differences in yield were not observed, considering all studied genotypes, showing that no association between low yield and Al3+ tolerance was found in this condition. The line 21 was moderately resistant to powdery mildew. All studied genotypes presented susceptibility to the causal agents of leaf spots. 'Siete Cerros' and the lines 3 to 12 exhibited short stature associated with logding resistance; the lines 13, 14 and 23 showed long heads; the line 12, the highest number of spikelets and grains per spike; and the line 17, the heaviest grains. These genotypes represented, valuable genetic sources for these characteristics.
wheat; grain yield; agronomic characteristics; disease resistance; acid soil; limed soil