ABSTRACT. Beans can be found in different grain colours, and for this reason, it is important to understand the technological and nutritional quality of the diverse types of beans that are consumed. The objectives of this work were to identify the traits that determine Brazilian consumer choice of different bean colours and to evaluate whether different bean colours present differences in technological and nutritional traits. For this purpose, beans of different colours (white, cranberry, matte red kidney, shiny red kidney, and black) were obtained from supermarkets. The samples were evaluated for consumer preference and the technological and nutritional traits of the beans. In southern Brazil, the majority of the survey participants (58%) preferred black beans, and their choice was based on consumption habit (66%) and grain colour (30%). Different bean colours presented differences for all traits related to technological and nutritional quality, except for potassium concentration. Consumption habit and grain colour defined consumer choice for black beans. Black beans were preferred by 58% of the participants, and this type of bean has high concentrations of calcium, magnesium, iron, zinc and copper.

RESUMO. Estimativas de parâmetros genéticos para a concentração de ferro e zinco em sementes de feijão Andino foram obtidas usando os cruzamentos IAC Boreal × Light Red Kidney e Ouro Branco × Light Red Kidney. Os parentais e as gerações F1, F1 recíproco, F2, F2 recíproco e retrocruzamentos RC11 e RC12 foram avaliados em experimento de campo conduzido em Santa Maria, Estado do Rio Grande do Sul, Brasil. A concentração de ferro nas sementes de feijão Andino variou de 24,70 a 102,40 mg kg-1 de matéria seca - MS e a de zinco, de 10,73 a 37,50 mg kg-1 de MS, sem que expressão de efeito materno tem sido observada. A herdabilidade em sentido restrito foi de baixa (h2r= 19,04%) a alta (h2r= 63,60%) magnitude para a concentração de ferro e de zinco, respectivamente. Vigor híbrido e segregação transgressiva foram observados para a concentração de ferro e de zinco em sementes de feijão Andino. Na combinação híbrida IAC Boreal × Ligh Red Kidney é possível selecionar recombinantes para o programa de biofortificação de ferro e zinco. A partir das combinações híbridas testadas podem ser selecionados recombinantes com baixa concentração de ferro e de zinco nas sementes para atender os casos de necessidade de restrição desses minerais na alimentação.

ABSTRACT. The genetic parameter estimates of the iron and zinc concentrations in Andean common bean seeds were obtained using the IAC Boreal × Light Red Kidney and Ouro Branco × Light Red Kidney crosses. The parents and the F1, F1 reciprocal, F2, F2 reciprocal, and backcross BC11 and BC12 generations were evaluated in a field experiment that was carried out in the state of Rio Grande do Sul, Brazil. The iron concentration in Andean common bean seeds ranged from 24.70 to 102.40 mg kg-1 dry matter (DM), the zinc concentration ranged from 10.73 to 37.50 mg kg-1 DM, and no significant maternal effect was observed. The narrow-sense heritability ranged from low (h2n= 19.04%) to high (h2n= 63.60%) for the concentrations of iron and zinc, respectively. Hybrid vigor and transgressive segregation were observed for the iron and zinc concentrations in Andean common bean seeds. In the hybrid combination IAC Boreal × Light Red Kidney, it was possible to select recombinants for the iron and zinc biofortification program. From the tested hybrid combinations, recombinants with low iron and zinc concentrations in seeds could be selected to use when the diet needs to be restricted in those minerals.