Genetic constitution of anthracnose-resistance in common bean lines
Helton Santos Pereira, and João Bosco dos Santos
Aiming at the identification of common bean lines with anthracnose-resistance, 256 lines obtained from the backcrossing program of the donor parent G2333 (carrier of the alleles Co-42, Co-5, and Co-7) with the recurrent parents ESAL 696 and CI 140 were used. These lines were inoculated with the three races 2047, 1545, and 73. In the lines with allele Co-42, resistant to race 2047, we could not identify other resistance alleles, although Co-5, Co-7 or both might be present in some of them. In the lines without allele Co-42 (susceptible to race 2047) and inoculated with the races 1545 and 73, some lines were identified with pyramid Co-5 and Co- 7, some with Co-5 only, and others with Co-7 only. Lines carrying allele Co-7 only can be used for tagging.