Crosses and backcrosses were performed between the semi-dwarf cultivars IAC-24 and Anahuac, tolerant and sensitive to aluminum toxicity, respectively. Seedlings from the parents, F1 generation of the cross between them as well as from the backcrosses to both parents were evaluated in nutrient solutions containing 2 mg/l of Al3+. Progenies of F2 and F3 generations from the cross and progenies of F2 generation from the backcrosses were also studied. Plants that were able to show root regrowth of the central primary root in the complete nutrient solution after a treatment of 48 hours in solution containing 2 mg/l of Al3+ were considered tolerant. The cultivar IAC-24 differed from Anahuac by one pair of dominant genes for the tolerance to the presence of this aluminum concentration into the nutrient solution.
wheat; aluminum toxicity; tolerant cultivar; sensitive cultivar; dominant genes; nutrient solutions