Avaliação de linhagens de trigo provenientes de cruzamentos interespecíficos em dois locais no Estado de São Paulo e em laboratório

Eighteen semidwarf type wheat inbred lines, originated from interespecific cross between bread and durum wheat and two control cultivars (IAC-24 and IAC-370), were evaluated in four trials, with four replications, carried out at Capao Bonito, in acid soil without lime application and upland condition, and at Mococa, acid soil with lime application and sprinkler irrigation condition, in 2003 and 2004, in relation to grain yield, plant height and resistance to leaf rust. The tolerance to Al3+ toxicity was evaluated in nutrient solutions containing 0, 2, 4, 6, 8 and 10 mg L-1, in the laboratory. The inbred line 14, in Capao Bonito, was immune to the Puccinia recondita f. sp. tritici, causal agent of leaf rust and was superior for grain yield and tolerance to aluminum toxicity. In the four trials, the cultivars IAC-24 and IAC-370 and the inbred lines 5, 9, 10, 12, 13, 18, 19 and 20 showed moderate resistance to the causal agent of this rust. The inbred line 14 due to the resistance to the causal agent of leaf rust in all trials could be used considered a source of genetic for this character. In general, genotypes were tolerant to aluminum toxicity because they showed root growth after treatment in solution containing 10 mg L-1, except for the cultivar Anahuac sensitive to 2 mg L-1 of Al3+, and the cultivar IAC-370 and the line 13, sensitive to 4 mg L-1 of Al3+. Grain yield in acid soil without lime application in upland condition and plant height were affected in the same way by aluminum toxicity.