Storage and loss moduli (G0 and G00) of rice starch and flour pastes dependent on temperature and frequency
were characterized from two starch mutants (waxy mutant GM077 and white-core mutant
GM645) and their parent Guangluai 4 (GLA4). The values of G0 and G00 for rice starch and flour pastes
decreased with the increase in temperature during heating. GLA4 contained the highest amylose content
and exhibited the highest values in both G0 and G00, while the waxy mutant GM077 that had the lowest
amylose content showed the lowest values in G0 and G00. During the cooling process, GLA4 and GM645,
with higher amylose content, presented more significant increase in values of G0 and G00, indicating that
amylose played an important role in intermolecular entanglement and gel network formation. G00
showed sharper increase than G0 as a function of frequency for both starch and flour pastes. Results
observed in the current study will be of use to rice breeders and allied industries to meet the diversified
demands for quality improvement of food products.