Adaptability, stability and pathogen resistance in common bean genotypes

Abstract

The objective of this work was to evaluate the resistance of bean genotypes to the main pathogens of the culture, and the adaptability and stability of these genotypes’ grain yield. Twenty‑six genotypes were evaluated for their resistance to Colletotrichum lindemuthianum, Fusarium oxysporum f. sp. phaseoli and Xanthomonas axonopodis pv. phaseoli, by inoculation, in laboratory, and in 19 trials the value for cultivation and use (VCU), in different locations of the state of São Paulo, Brazil, in “rainy”, “dry”, and “winter” seasons, during the growing years of 2011, 2012, and 2013. Eighteen genotypes were considered resistant, as follows: seven of them to C. lindemuthianum, seven to F. oxysporum f. sp. phaseoli, and four to X. axonopodis pv. phaseoli. Resistance reaction to pathogens is associated with genotype stability. GGE biplot analyses made it possible to identify genotypes superior to the controls for adaptability and stability, in the two groups of integument evaluated in all sowing dates.