Variabilidad genética y ambiental en inhibidores de tripsina y hemaglutininas, observadas en cultivares de frijol común (Phaseolus vulgaris) proveniente de América Central y Colombia.

Abstract

The purpose of the present study was to learn of the effects of environment and of color of seed coat on the concentration of trypsin inhibitors and hemagglutinin compounds in Phaseolus vulgaris. A total of 20 cultivars obtained from CIAT were planted at the same time in Colombia, El Salvador and Honduras These samples were then sent to INCAP, Guatemala These 20 cultivars, therefore, came from three different localities and were classified into 4 color types: black, white, red and brown. Samples were analyzed for trypsin inhibitors and hemagglutinin compounds and the results were statistically analyzed through a factorial analysis of variance This indicated a significant effect of environment on trypsin inhibitors, with samples from Honduras having higher concentrations than those from the other localities Color of the seed and the interaction between environment and color had no effect on trypsin inhibitor activity The concentration of hemagglutinin activity was significantly affected by environment, with samples from Honduras having lower activities than those from the other localities. In this case, color of the seeds influenced statistically the activity of hemagglutinin compounds with values for color seed higher than those found in white seeds. The interaction between environment and color did not affect hemagglutinin content in the seed. Trypsin inhibitor activity was highly correlated with methionine concentration Because of this, it would be of some practical interest to determine the influence of specific environmental factors on trypsin inhibitor activity such as water availability and mineral composition of the soil.