O objetivo deste trabalho foi avaliar a variabilidade genética de linhagens de feijão para ciclo, massa de 100 grãos, produtividade de grãos, tempo de cozimento e concentração de cálcio e ferro nos grãos. Vinte e quatro linhagens de feijão foram avaliadas em dois ciclos de cultura (2010 e 2011). O índice ¯Z foi usado para a seleção de linhagens superiores, para a maioria dos caracteres. As linhagens DF 06-19, DF 06-03, DF 06-17, DF 06-20, DF 06-11, DF 06-14, DF 06-01, DF 06-08, DF 06-22 e DF 06-04 apresentaram alta produtividade de grãos. Todas as linhagens foram de ciclo semiprecoce e de rápido cozimento. As linhagens DF 06-08 e DF 06-23 apresentaram alta concentração de cálcio nos grãos (>1,4 g kg-1 de matéria seca - MS), e as linhagens DF 06-09, DF 06-03, DF 06-04 e DF 06-06 apresentaram alta concentração de ferro nos grãos (>0,95 g kg-1 de MS), nos dois anos agrícolas. As linhagens do grupo carioca DF 06-09 e DF 06-03 apresentam alto desempenho agronômico e alta concentração de ferro nos grãos. As linhagens do grupo preto DF 06-17 e DF 06-08 apresentam alto desempenho agronômico e alta concentração de cálcio nos grãos. A seleção das linhagens DF 06-09, DF 06-03, DF 06-17 e DF 06-08 é recomendada.
The objective of this work was to evaluate the genetic variability of common bean lines for cycle, weight of 100 grains, grain yield, cooking time, and grain calcium and iron concentrations. Twenty-four common bean lines were evaluated in two crop cycles (2010 and 2011). The ¯Z index was used for the selection of superior lines for most of the traits. The DF 06-19, DF 06-03, DF 06-17, DF 06-20, DF 06-11, DF 06-14, DF 06-01, DF 06-08, DF 06-22, and DF 06-04 lines showed high grain yield. All lines were of semi-early cycle and of fast cooking. The DF 06-08 and DF 06-23 lines showed high calcium concentration in grains (>1.4 g kg-1 dry matter - DM), and the DF 06-09, DF 06-03, DF 06-04, and DF 06-06 lines presented high iron concentration in grains (>0.95 g kg-1 DM) in the two crop cycles. The DF 06-09 and DF 06-03 carioca lines present high agronomic performance and high iron concentration in grains. The DF 06-17 and DF 06-08 black lines present high agronomic performance and high calcium concentration in grains. The selection of the DF 06-09, DF 06-03, DF 06-17, and DF 06-08 lines is recommended.