Resumo

RODRIGUEZ-MIRANDA, Odile  e  ROSAS-SOTOMAYOR, Juan Carlos. Elección de genotipos de frijol común por su resistencia al tizón bacteriano. Agron. Mesoam [online]. 2010, vol.21, n.2, pp.275-280. ISSN 2215-3608.

Selection of genotypes of common bean for their resistance to common smut. In November of the 2007, the reaction of bean genotypes to the common smut produced by the isolation EAP 9506 of Xcp of Honduras was evaluated, and new lines and tolerant varieties to this pathogen were identified. The study was developed in a greenhouse of the experimental area at Research Program on Bean (PIF), Pan- American Agricultural School, Zamorano, Honduras. Two experiments were established: 1) 37 genotypes from Cuba, 2) 27 genotypes from the PIF in Honduras. The plants were inoculated at the stage V3 with the isolation EAP9506, using the method of multiple puncturing. The severity of the damage was evaluated 20 days after inoculation, using a visual scale from 1 to 9 (1=no symptoms; 9 = severe symptoms). The genotypes that showed resistance reaction to Xcp in experiment 1 was XAN 159, and in experiment 2, VAX 3, VAX 5, VAX 6, XAN 309 and XAN 310, and lines resulting from the cross Tío Canela 75/VAX6, and with X0104-45-3-5-5, X104-45- 5-1-4 y X104-45-5-5-3 showing outstanding resistance values.

Palavras-chave : Phaseolus vulgaris; common smut; Xanthomonas campestris.

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