Determinação de parâmetros de qualidade de grãos associados ao comportamento culinário em arroz de terras altas
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2015-09-29
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Universidade Federal de Goiás
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The factors that control the rice cooking behavior are related to the physicochemical characteristics of the grain. The information of these traits is important to understanding the changes undergone by food during the cooking process. The objective of this work was to understand culinary behavior of upland rice genotypes with different levels of amylose through the characterization of physical, physicochemical, genetic and cooking quality of grain, as well as linking these factors to each other in order to point out reliable and reproducible indicators. We have analyzed eleven upland rice genotypes from the 2013 crop season at Embrapa Rice and Beans regarding the physical grain quality traits (head rice yield, grain size, percentage of chalk, milling degree), starch granule properties (morphology of the starch granules, swelling power, apparent amylose and absolute gelatinization temperature by alkaline dispersion, thermal properties by differential scanning calorimetry, pasting properties, the size distribution of amylopectin branched chains) and cooking quality (texture: hardness and stickiness of cooked grains (by cooking and instrumental tests) and of rice RVA gel). For genomic analysis, eight molecular markers associated to the cooking quality profile and described in the international literature were used. This study resulted in reliable and reproducible indicators of food quality for upland rice, to predict the culinary behavior profile were identified as key: the amylose content, gelatinization temperature, paste properties, instrumental texture properties and sensory of grains. In relation to validation markers for grain quality, it is concluded that the information derived from the analysis of association was possible to identify markers associated with cooking and technological attributes as well as to these favorable alleles. The final considerations involved in this study indicate that for different stages of breeding programs to launch on the market are cultivars of different analyzes displayed until the last assay which involves growing and use value.
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FONSECA, R. C. Determinação de parâmetros de qualidade de grãos associados ao comportamento culinário em arroz de terras altas. 2015. 116 f. Dissertação (Mestrado em Ciência e Tecnologia de Alimentos) - Universidade Federal de Goiás, Goiânia, 2015.