.1. Materials
Black rice cultivar IAC-600 and red rice lineage MPB-10 were cultivated under an irrigation system in Pelotas, State of Rio Grande do Sul, Brazil. The rice grains were harvested when the moisture content was approximately 20%, transported to the Postharvest, Industrialization and Quality of Grains’ Laboratory at the Federal University of Pelotas and subjected to cleaning and drying processes until a 13% moisture content was achieved. The method described by Bertoft, Piyachomkwan, Chatakanonda, and Sriroth (2008) was used to determine the amylose content of the rice samples. The IAC-600 black rice cultivar presented 23.4% amylose content while the MPB-10 red rice lineage presented 32.0% amylose content.
2.2. Rice processing