Six varieties of long-grain rice were selected as representative
of the main production in the region. Four of them were from the
National Institute of Agricultural Research from Ecuador : INIAP 14, INIAP 15, INIAP 16 and INIAP 17 and
two varieties were from the company PRONACA (Guayaquil,
Ecuador): F09 and F50. The average size of the rice grains was
7.2 mm ± 0.1 mm. All varieties were harvested between May and
December of 2011. All the samples were provided by INIAP.