Qualidade industrial e propriedades do amido de grãos do colmo principal e dos perfilhos de genótipos de arroz.

Abstract

The study aims to evaluate the quality industrial, cooking and properties of starches isolated from the main stem (CP) and tillers (PF) of five genotypes of rice, four hybrids and conventional farming. The grains of genotypes Avaxi CL, QM Arize 1010, BRS 302 and CIRAD INOV CL (hybrid) and BR IRGA 409 (cultivar) were harvested with moisture 20-25% and dry up 12-13%. The hybrid genotypes of rice have a higher number of tillers per plant and higher production than cultivar BR IRGA 409. The grains of tillers had higher humidity than the main stem grain at harvest, but no difference in chemical composition. The yield of the entire main stem was higher than the yield of the tillers of the hybrid genotypes but similar to cultivar BR IRGA 409. The genotypes showed few grains with metabolic defects, as evaluated without being subjected to storage, however the percentage of plastered was found, more in tillers than the main stem. The cooking time of the rice grains differ between genotypes, being lowest for cultivar BR IRGA 409 and there were no differences between the grains of the main stem and tillers. The extraction yield of starch differ between genotypes but not between the main stem and tillers. There were differences between the properties of the starches from the rice genotypes, and between starches from main stem and tillers, and the viscoamylographic properties, swelling power and solubility were the properties that differed most.