Abstract

TOSQUY-VALLE, Oscar Hugo et al. Yield and reaction to diseases of bean genotypes under rainfed conditions and residual moisture. Rev. Mex. Cienc. Agríc [online]. 2012, vol.3, n.4, pp.727-737. ISSN 2007-0934.

In Chiapas, Veracruz and Puebla, diseases are one of the main factors that reduce the yield of beans. The objectives were to determine the productive performance ofblack bean genotypes in rainfed and residual moisture and, their reaction to disease. In 2008, a trial was made in Ocozocoautla, Chiapas, Orizaba, Veracruz and Tecamachalco, Puebla, in rainfed conditions and, in Medellín de Bravo and San Andrés Tuxtla, Veracruz, with residual moisture. 11 varieties and five lines were evaluated, in lattice design 4x4 with four replications. In field, the reaction was quantified to the common mosaic virus, angular leaf spot, rust and anthracnose, with a scale of 1 to 9 of CIAT and grain yield in kilograms per hectare. An analy sis of variance was performed for each disease, which were correlated with grain yield, as well as combined analysis of genotypes yield for moisture condition and, overall analysis of all tested environments. For the separation of means DMS at 0.05 was applied. Negro Papaloapan yielded 1 753 kg ha^-1 in rainfed and, 1 3 3 3 kg ha^-1 with residual moisture; both average yields were statistically higherthan the other genotypes. The incidence of anthracnose (r= -0516*) in the first condition and, angularleaf spot (r= -0528 *) in the second one, significantly reducing its yield. Negro Papaloapan was the mostproductive in both conditions, and showed resistance to common mosaic, angular leaf spot and, anthracnose tolerance.

Keywords : Phaseolus vulgaris L.; environment; fungus; productivity; varieties; virus.

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