Caracterização de isolados de Colletotrichum lindemuthianum em feijoeiro comum (Phaseolus vulgaris L.) coletados no estado do Mato Grosso

Abstract

The monitoring of physiological races of Colletotrichum lindemuthianum, which causes anthracnose in common beans, is an important tool for breeding programs, since it facilitates identification of genetic sources of resistance to the effective control of this disease. Therefore, this study aimed to characterize isolates of C. lindemuthianum collected in common bean crops in the state of Mato Grosso. Thirty isolates of Colletotrichum lindemuthianum tested on 12 differential cultivars of Phaseolus vulgaris L., allowed the identification of 10 races of C. lindemuthianum, 1, 8, 9, 10, 24, 64, 65, 72, 73 and 81. It is noteworthy this is the first report of the races 1, 8, 9, 10, 24, 64, 72 and 73 C. lindemuthianum in MatoGrosso and the first record of 24 race in the world. There was a higher frequency of the races 64, 65 and 81. All isolates were incompatible with the cultivars Perry Marrow, Kaboon, PI 207262, TO, TU, AB 136 and G 2333. Some isolated not only infected the Mesoamerican origin of cultivars, but also those of Andean origin. Cultivars Perry Marrow, Kaboon, PI 207262, TO, TU, AB 136 and G 2333 constitute important sources of resistance to be used in common bean breeding programs for the control of anthracnose in the state of Mato Grosso.