Resumo

GRANITO, Marisela; GUINAND, Julieta  e  PEREZ, Delis. Chemical and nutritional composition of venezuelan phaseolus vulgaris cultivated varieties. Agronomía Trop. [online]. 2006, vol.56, n.4, pp.513-522. ISSN 0002-192X.

Phaseolus vulgaris is an important source of nutrients that is part of the staple diet of the Venezuelan population. Although there are adequate agroclimatic conditions for its growth in the country, Venezuela must import this foodstuff to meet the demand. The reasons for this fact are multiple, among which, the lack of certified and quality seeds could be pointed out. The objective of this work was the chemical and nutritional characterization of genetically improved black beans from the germplasm bank of the Instituto de Investigaciones Agrícolas (INIA), Maracay. Nine varieties of  P. vulgaris were analyzed regarding moisture, protein, fat, ash, minerals and polyphenol, following the methodologies described in the AOAC. To determine total and available starch the methodology of Holm et al., was used, for resistant starch Champ et al. was applied and tannins were determined by Naczk et al. Average values found were of 29,95% for protein, 2,44% for fat, 4,35% for ash, 43,88% of total starch, 38,99% of available starch, 25,48% of resistant starch, 846 mg 100gbs^-1 of polyphenols and 40,91 mg 100gbs^-1 of tannins. From these results, it was concluded that among the varieties characterized, there is a great variability of both nutrients and bioactive components, which suggests an important source of nutrients that may contribute to the diversification of the diet of Venezuelans.

Palavras-chave : Phaseolus vulgaris; chemical composition; nutritional composition.