Controle genÃtico da reaÃÃo do feijoeiro ao Phaeoisariopsis griseola e seleÃÃo de famÃlias baseada em caracteres agronÃmicos / Genetic control of common bean reaction to Phaeoisariopsis griseola and selection of promissing families based on agronomical traits.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

The genetic control of common bean reaction to the agent of angular leaf spot was studied by crossing the ESAL 693 line (resistant) and cv. Rosinha (susceptible) cultivar. Superior families were also selected in F2:3 population based on grain type and yield. The research was set up at the Departament of Biology/UFLA â MG. The reaction of angular leaf spot was evaluated in F2 plants and F2:3 families, under natural incidence of the pathogen in the field. One hundred and twenty F2:3 families were selected for grain type like those of Carioca and Rosinha cultivars. The families plus the ESAL 693 were evaluated in the dry reason of 2001, using a 11 x 11 lattice square design, with two replications and plots of one in long line. Besides the angular leaf spot reaction, the families were also evaluated for grain yield ant type. The reaction to P. griseola was due to one gene, and the resistance allele from ESAL 693 is dominant. The high variability of the families implies the possibility of selecting promising lines for grain type and yield and resistant to angular leaf spot.

ASSUNTO(S)

mancha angular plant breeding production produÃÃo melhoramento genÃtico vegetal common bean seleÃÃo feijÃo angular leaf spot selection genetica vegetal

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