Combining disease resistance and postharvest quality traits by early marker-assisted backcrossing in carioca beans

Common bean is a worldwide important crop. The development of varieties with durable resistance to diseases major challenge in common breeding. present study aimed at evaluating the phenotypic and molecular selection anthracnose population obtained by assisted backcrossing from IAC Formoso (resistant, donor parent) × BRS Pérola (susceptible, recurrent parent). Nine microsatellites (SSRs) one Sequence Tagged Sites (STS) markers previously linked ANT were used genotype this progeny, results showed that genotypes closest parent BC1F1 decreased number cycles necessary obtain advanced isogenic lines, potentiating use tool for early resistant cultivars. A total 31 % progeny was selected backcrossed again. derived second backcross (BC2F3) Carioca grain ideotype, 42 high under controlled conditions infection races 65 81. Superior plants evaluated natural fusarium wilt angular leaf spot, allowing two inbred lines higher anthracnose, wilt, spot postharvest quality traits such as yield, 100 seed weight, L value harvest darkening cooking time. approach outlined paper proved be effective simultaneously select disease without losing technological aspects bean.