IDENTIFICATION OF A MOLECULAR MARKER LINKED TO CO-11 ANTHRACNOSE RESISTANCE GENE IN COMMON BEAN

摘要

The fungus Colletrotrichum lindemuthianum, causal agent of anthracnose, is found in diverse common bean production areas around the world. The using of resistant cultivars is one of most recommended method to control this disease, and it has been demonstrated to be efficient and viable economically (Pastor-Corrales et al., 1995). On the other hand, the identification of resistance genes through molecular markers has shown great importance for breeding programs, once it allows a resistance selection of plants without the presence of the pathogen. The Michelite cultivar, which belongs to the 12 differential group of common bean (Phaseolus vulgaris L.), is a significant resistance source to anthracnose (Pastor-Corrales et al., 1995). Previously study had characterized the gene Co-11 which confers genetic resistance in Michelite (Gon9alves-Vidigal et al., 2007). This gene coffers resistance to the races alpha, beta (130), gamma (102), 0, 2, 4, 6, 36, 38, 64, 128, 132, 192, 256, 258, 264, 320, 384, 388,448, 1088, 1344, 1472, 1600 and some races named as MA-1 to MA-6, and MA-8 to MA-10 of the Mexican groups (Yerkes Jr. and Ortiz, 1956; Cardenas et al., 1964; Mahuku and Riascos, 2004). Therefore, in order to assist the selection of resistant genotypes,the present work had as objective to identify molecular markers linked to gene Co-11.