Abstract

DELGADO, H.; PINZON, E.H.; BLAIR, M.  and  IZQUIERDO, P.C. EVALUATION OF BEAN (Phaseolus vulgaris L.) LINES RESULT OF AN ADVANCED BACKCROSS BETWEEN A WILD ACCESSION AND RADICAL CERINZA. rev.udcaactual.divulg.cient. [online]. 2013, vol.16, n.1, pp.79-86. ISSN 0123-4226.

In order to select potential parents with adaptation to the area, adequate yield and grain type, 100 genotypes (95 RC2 lines and 5 witnesses) of bush bean (Phaseolus vulgaris L.) were evaluated in a lattice design 10 x 10 at the Experimental Farm Tunguavita, Paipa-Boyaca. The RC2 lines were obtained from an advanced backcross between Radical Cerinza population (recurrent parent) and a wild accession G 10022 (donor parent). Vigor, days to flowering and maturity, grain yield and its components: number of pods per plant, number of grains per pod and weight of 100 grains, were evaluated. The final grain yield showed its highest correlation coefficients and significance for the components number of pods per plant and weight of 100 grains. Several lines, expressing transgressive segregation of Radical Cerinza, the recurrent parent, in the variables number of pods per plant, weight of 100 grains and final yield, with seven significantly superior lines in yield and appropriate grain type were identified. The line of maximum yield with 3.894kg ha^-1exceeded the recurrent parent in 1.811kg ha^-1. These results indicate that the advanced backcross method is proving to be efficient for high yield genes, introgressed from wild accessions to improved cultivars. The lines with best yields should furthermore be advanced with this methodology, in the search of donor parents of high yield genes to obtain new bush bean improved varieties, for cold climate of the Boyacá department.

Keywords : Advanced backcross; pre-breeding; beans; yield and components.

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