Genetic bases of the inheritance of Al-toxicity tolerance in wheat genotypes

Abstract

Aluminium sensitive and aluminium tolerant wheat genotypes (Tritictim aestivum L.) were used to study the inheritance of responses to aluminium toxic effects P₁, P₂, F₁, F₂, BC₁F₁, e BC₂F₁ generations where grown under Al-toxic soil at Centro Nacional de Pesquisa de Trigo (CNPT/EMBRAPA, Passo Fundo, RS) in 1979. There appeared to be high genetic differences between the two groups: sensitive (Anza, Siete Cerros e Toquifen) and tolerant (BH-1146, Cotiporã, Lagoa Vermelha, Maringá and Nobre) for aluminium response. Segregated population data from sensitive/tolerant crosses showed tolerance conditioned at least, by a dominant homozygous locus. The additivity-effects and heritability estimations were large. The basic results indicated that selection of tolerant genotype could be simple and rapid.