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The objective of thisexperiment was to select bean genotypes with high yieldpotential, wide adaptation, multiple disease resistance andtolerance to acid soils. For that reason, during the Fall-Winter1999-2000 cycle, a uniform yield trial was conducted in fourenvironments in Veracruz and Chiapas, Mexico. Sixteengenotypes were evaluated, including the varieties NegroJamapa as a regional control. A randomized Complete Blockdesign with three replications was used. Grain yield wasevaluated by means of individual and combined analysis ofvariance and stability parameters. Reaction to diseases wasgraded according to a 1-9 scale; the Efficiency Index (IE) wasused to evaluate the tolerance to acid soils. There weresignificant differences in grain yield and tolerance to diseasesfor localities, genotypes and the locality .genotypeinteraction; whereas for the tolerance to acid soils there wasno significant differences between localities and theinteraction. The best genotypes with regard to yield,adaptation and tolerance to acid soils were Negro 8025,DOR-454, Icta Ju 95-112, Icta Ju 93-15 and DOR-448; thefirst and the last varieties had multiple resistance to diseases.The lines UCR-55, TLP-22 and DOR-500 also showed highyields and multiple disease resistance.

Adaptación, resistencia múltiple a enfermedades y tolerancia a suelos ácidos en genotipos de frijol.