Inheritance of resistance to races 69 and 453 of Colletotrichum lindemuthianum in the common bean

The cultivars, AB 136 and G 2333 both resistant to Colletotrichum lindemuth ianum races 69 and 453, were crossed with the cultivars Michelite and Ferry Marrow (susceptible to both races), with Dark Red Kidney and Cornell 49242 (resistant to both races) and F-1 and F-2 generations were obtained. Plant s were inoculated using a spore suspension at 1.2 x 10(6) concentration. Th e reaction of F-1 and F-2 populations showed that Dark Red Kidney, Cornell 49242 and AB 136 cultivars had the dominant genes A (Co-l), Are (Co-2) and Co-6, respectively, was conferring resistance to races 69 and 453. The segr egation data obtained from F2 populations indicated that G 2333 carried two dominant resistance genes Co-5 gene and another one Co-7 for 69 and 453 ra ces. The dominant genes in G 2333 and its resistance to C. lindemuthianum r ace could be transferred to provide anthracnose resistance to susceptible c ultivars relatively easy.