SELECTION FOR ALUMINUM TOLERANCE IN TROPICAL SOYBEANS

Authors

  • Carlos Roberto Spehar
  • Luiz Augusto Copati Souza

Keywords:

Subsurface acidity, Glycine max, Al stress, plant breeding

Abstract

Soil acidity is a limiting factor for most of the cultivated plants in the Brazilian Savannah. Toxicity caused by aluminum (Al) is especially serious in the acid subsurface, which remains acidic after soil has been amended, by hindering root growth and causing drought susceptibility and nutritional unbalance. This research aimed at selecting soybean with increased tolerance to Al through association of hydroponics and field experiments. Crosses including savannah adapted genotypes were obtained. Seeds of contrasting individuals, selected in hydroponics at F2 generation for root growth, were obtained for progeny evaluation at F3, in the field, and at F4 in hydroponics. Grain production and total dry matter of selected progenies were superior to the parentals, in the acid soil experiment. These results were confirmed by performance in hydroponics, indicating the method may be successfully employed in breeding programs for crop adaptation to subsurface acid soil conditions.

KEY-WORDS: Subsurface acidity; Glycine max; Al stress; plant breeding.

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Author Biography

Carlos Roberto Spehar

Embrapa Cerrados (CPAC). Caixa Postal 08223, CEP 73310-970 Planaltina, DF. Brazil. E-mail: spehar@cpac.embrapa.br

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Published

2007-10-27

How to Cite

SPEHAR, C. R.; SOUZA, L. A. C. SELECTION FOR ALUMINUM TOLERANCE IN TROPICAL SOYBEANS. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 36, n. 1, p. 1–6, 2007. Disponível em: https://revistas.ufg.br/pat/article/view/2162. Acesso em: 17 jul. 2024.

Issue

v. 36, n. 1, Jan./Apr. 2006

Section

Research Article

License

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