Digestibilidad del almidón en diferentes variedades de frijol (phaseolus vulgaris L.)

The chemical composition and starch digestibility of four common bean (Phaseolus vulgaris L.) varieties were studied. Protein, content was not significantly different (p ≤0.05) and lipid content was low, with no appreciable differences. Beans are a good source of minerals (3.67-5.15% ash content). The Flor de Mayo variety presented the lowest total starch (TS) content (34.70%), while the Peruano (42.81%) and Mayocoba (40.24%) varieties showed the highest ones. Flor de Mayo (32.27%) and Peruano (31.60%) also showed the highest available starch (AS) levels, and the lowest ones were in Mayocoba (22.87%) and Negro (21.7%). The lowest resistant starch (RS) level was in Flor de Mayo (2.43%) and the varieties with higher TS (40.24-42.81%) also had higher RS content (5.41-6.4%). The highest (p<0.05) hydrolysis percentages (34-37%) were measured in Flor de Mayo and Peruano, coinciding with their AS values. The highest predicted glucemic index (pGI) was determined in Peruano (68.69), and the lowest in Mayocoba (57.88) and Negro (58.40) varieties. The pGI values obtained for these bean varieties are considered to be low.