Aluminum Tolerance In Soybean .1. Genotypic Correlation And Repeatability Of Solution Culture And Greenhouse Screening Methods

Breeding for Al tolerance in soybean [Glycine max (L.) Merr.], has been hindered by confusion regarding screning methodology. This study was undertaken to determine the relationship between greenhouse and solution culture screening methods, using 12 diverse soybean genotypes. Greenhouse media consisted of a Goldsboro sandy loam (fine-loamy, siliceous, thermic Aquic Paledult) at 19% Al saturation and the same soil amended with Al 2 (SO 4 ) 3 to 55% Al saturation. Solution-culture media consisted of 0 or 11 μM Al 2 (SO 4 ) 3 added to 200 μM CaSO 4 solutions. Traits measured were shoot dry weight in grenhouse pots and radical elongation rate in solution culture (...)