Comparative study on the quality characteristics of wheat‐based broken rice noodles from different rice varieties

Abstract

SummaryMaking noodles based on broken rice (BR) is a green approach to promote the utilisation of rice byproducts (the underutilised bio‐materials with vast annual production). In this study, BR of Indica, Japonica and Glutinous varieties were semi‐dry milled to yield flour (BRI, BRJ and BRG). They were substituted for wheat flour at the level of 10% to prepare W‐BRI, W‐BRJ and W‐BRG noodles respectively. Among three varieties, BRG showed greatest whiteness, highest relative crystallinity and lowest pasting viscosities. Substitution of all BR flours decreased percentage of α‐helix but increased β‐sheet in fresh noodles. BRG substitution markedly enhanced the binding tightness of water to gluten or starch. Owing to the strongest swelling power and lowest pasting temperature (59.1 °C) of BRG, W‐BRG noodles showed shortest cooking time and highest cooking yield (190.64%). All noodles were sensorily acceptable, among which W‐BRG noodles had the greatest softness and least stickiness. W‐BRJ noodles presented more uniform and tightly packed microstructure, which might explain their lowest cooking loss (6.65%) and greater springiness. W‐BRI dough sheet had the most viscoelastic, and its noodles had the highest cohesiveness (0.65). Selective utilisation of rice variety is crucial for producing noodles with characteristic quality.