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RESUMEN Product quality and safety are two essential characteristics for the fruit market, making it necessary to normalize and standardize processes in order to improve their commercialization. In this study, the quality of two Andean blackberry cultivars grown in two regions of Antioquia (Envigado and Guarne), Colombia, from different maturity stages as defined by the Norma Tecnica Colombiana 7146 (NTC Spanish) was characterized. The parameters that were found suitable for the fruit quality characterization were: weight, total solid soluble content (TSS), titratable acidity (TA), maturity index (MI), color index (CI) and firmness (F). The equatorial diameter (ED) maintained its importance relative to the standard and the market, along with the juice yield (JY). The quotient a*/b* presented the best correlation with the visual color scale as defined in the standard. The TSS ranges defined in NTC 4106 were not verified in this studied for fruits grown in the agroclimatic conditions of Antioquia. Linear regression models are a useful tool for making quick and easy comparisons and estimations of the quality parameters. Actualmente la calidad e inocuidad de los productos es un requisito de los mercados de frutas, haciendo necesario la estandarizacion y normalizacion de los procesos. En este estudio, se caracterizo la calidad de dos cultivares de mora de ‘Castilla’ producidos en dos localidades de Antioquia (Envigado y Guarne), Colombia, en los diferentes estados de madurez que define la NTC 4106. Los resultados mostraron que los parametros mas adecuados para la caracterizacion de la calidad del fruto fueron: peso, solidos solubles totales (SST), acidez titulable (AT), indice de madurez (IM), indice de color (IC) y firmeza (F). Se encontro que el diametro ecuatorial (DE) guarda su importancia respecto a la norma y el mercado, asi como el rendimiento en zumo (RZ). El cociente a*/b* fue el que presento mejor correlacion con la escala visual de color definida en la norma. Los rangos de SST definidos en la norma no se verificaron en este estudio para las condiciones agroclimaticas de Antioquia. Los modelos de regresion linear son una herramienta util para realizar comparaciones y estimaciones rapidas de los parametros de calidad.

Quality characterization of Andean blackberry fruits (Rubus glaucus Benth.) in different maturity stages in Antioquia