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Genetics and monosomic analysis of aluminum tolerance in wheat (Triticum aestivum L.)

Mario Bastos Lagos^I; Maria Irene M. Fernandes^II; Carlos E. de O. Camargó^III; Luiz Carlos Federizzi^IV; Fernando I.F. de Carvalho^IV

^IDepartamento de Defesa Fitossanitária, Centro de Ciências Rurais, Universidade Federal de Santa Maria, 97100 Santa Maria, RS, Brasil.
^IICentro Nacional de Pesquisa de Trigo, Passo Fundo, RS. Brasil
^IIIInstituto Agronômico de Campinas, 13100 Campinas, SP, Brasil
^IVUniversidade Federal do Rio Grande do Sul, Caixa Postal 776, 90001 Porto Alegre, RS, Brasil. Send correspondence to L.C.F.

ABSTRACT

Experiments were conducted in order to investigate the genetics of tolerance to aluminum (A1⁺⁺⁺) in wheat and to determine the chromosome location of major genes involved, by monosomic analysis. The responses to Al⁺⁺⁺ were assessed by measuring the root regrowth, as described by C.E. de O. Camargo (Ph.D. Thesis, Oregon State University, 1978).
The level of Al⁺⁺⁺ that best descriminated between sensitive and tolerant plants was found to be 4 ppm. Genetic analysis of crosses with the variety BH 1146 demonstrated one or two different genes. Monosomic analysis revealed that the gene for tolerance to Al⁺⁺⁺ present in BH 1146 was located on chromosome 4D.

Keywords: Aluminum tolerance; Triticum aestivum.

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