Avaliação da qualidade industrial de linhagens de trigo por meio de métodos físico-químicos, reológicos e de panificação
Carregando...
Arquivos
Data
2013-04-12
Autores
Costa, Mariana Souza [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
A identificação das propriedades funcionais de farinhas de trigo através de testes específicos possibilita selecionar genótipos de trigo com características adequadas a cada uso industrial. O objetivo deste trabalho foi avaliar a qualidade tecnológica de dezesseis genótipos de trigo correlacionando as subunidades de gluteninas de alto e baixo peso molecular (HWS-GS e LWS-GS) e as subunidades de gliadinas com a cor, teor de amido danificado, taxa de extração de farinhas, testes das características físico-químicas do grão e com as propriedades físico-químicas, reológicas e de panificação da farinha. Nos grãos, o conteúdo protéico (CP), volume de sedimentação (SDS-VS), índice de sedimentação (IS = SDS-VS/ CP), número de queda (NQ), peso hectolitro (PH), peso de mil sementes (PMS) e índice de dureza (ID) foram analisados. Testes farinográficos, esxtensográficos,e viscoamilográficos foram realizados nas farinhas além dos testes de panificação. As subunidades de gluteninas e de gliadinas foram separadas usando SDS-PAGE e para cada HMW- GS foram calculados escores de 1 a 4, sendo o escore total (ET) mínimo de 4 e máximo de 10 para cada genótipo. Os amidos isolados dos diferentes genótipos de trigo foram analisados quanto ao teor de fósforo, lisofosfolipídeos (LPL), teor de amilose, propriedades térmicas e propriedades de pasta. Os dados foram submetidos à análise de variância, correlação de Pearson, análise de componentes principais e análise de cluster. Entre as amostras, o CP variou de 13,7 a 17,9 %, o SDS-VS de 8,3 a 14,6 mL e o IS de 0,58 a 1,01, sendo que estes dois últimos parâmetros mostraram forte correlação (r = 0,83) entre si. Os alelos 2* no Glu-A1 (43,8%), 7+9 no Glu-B1 (50,0%) e 5+10 no Glu-D1 (81,3%) foram...
Identification of functional properties of wheat flour by specific tests allows the selection of genotypes with appropriate characteristics for specific industrial uses. The aim of this study was to evaluate the technical quality of sixteen wheat genotypes by correlating both glutenin subunits of high and low molecular weight (LWS and HWS-GS-GS) and gliadins subunits with color, damaged starch, rate extraction flours, testing of the physicochemical characteristics of the grain and the physicochemical, rheological and baking flour. In grains, protein content (PC), sedimentation volume (SDS-SV), sedimentation index (SI = SV / PC), falling number (FN), hectolitre weight (HW), mass of 1000 seeds (MTS) and hardness index (HI) were analyzed. Farinography, extensography and viscoamylography were performed in addition to the flour baking tests. The glutenin and gliadins subunits were separated using SDS-PAGE and for each HMW-GS scores between 1 and 4 were calculated, with a minimum total score (TS) of 4 and a maximum TS of 10, for each genotype. Starches isolated from different wheat genotypes were analyzed for phosphorus, lysophospholipids (LPL), amylose content, thermal and pasting properties. The data were evaluated using variance analysis, Pearson’s correlation, principal component analysis, and cluster analysis. Among the samples, PC ranged from 13.7 to 17.9%, SDS-SV, from 8.3 to 14.6 mL and SI from 0.58 to 1.01, with the latter two parameters showing a strong correlation (r = 0.83) between them. The alleles 2* at Glu-A1 (43.8%), 7 +9 at Glu-B1 (50.0%) and 5 +10 at Glu-D1 (81.3%) showed more frequency in HMW-GS and due to this the most frequent TS were 9 and 10, showing a positive correlation with SDS-SV (r = 0.52), SI (r = 0.51) and MTS (r = 0.51). The allele c of Glu-A3 (56.3%) was the most frequent in LMW-GS... (Complete abstract click electronic access below)
Identification of functional properties of wheat flour by specific tests allows the selection of genotypes with appropriate characteristics for specific industrial uses. The aim of this study was to evaluate the technical quality of sixteen wheat genotypes by correlating both glutenin subunits of high and low molecular weight (LWS and HWS-GS-GS) and gliadins subunits with color, damaged starch, rate extraction flours, testing of the physicochemical characteristics of the grain and the physicochemical, rheological and baking flour. In grains, protein content (PC), sedimentation volume (SDS-SV), sedimentation index (SI = SV / PC), falling number (FN), hectolitre weight (HW), mass of 1000 seeds (MTS) and hardness index (HI) were analyzed. Farinography, extensography and viscoamylography were performed in addition to the flour baking tests. The glutenin and gliadins subunits were separated using SDS-PAGE and for each HMW-GS scores between 1 and 4 were calculated, with a minimum total score (TS) of 4 and a maximum TS of 10, for each genotype. Starches isolated from different wheat genotypes were analyzed for phosphorus, lysophospholipids (LPL), amylose content, thermal and pasting properties. The data were evaluated using variance analysis, Pearson’s correlation, principal component analysis, and cluster analysis. Among the samples, PC ranged from 13.7 to 17.9%, SDS-SV, from 8.3 to 14.6 mL and SI from 0.58 to 1.01, with the latter two parameters showing a strong correlation (r = 0.83) between them. The alleles 2* at Glu-A1 (43.8%), 7 +9 at Glu-B1 (50.0%) and 5 +10 at Glu-D1 (81.3%) showed more frequency in HMW-GS and due to this the most frequent TS were 9 and 10, showing a positive correlation with SDS-SV (r = 0.52), SI (r = 0.51) and MTS (r = 0.51). The allele c of Glu-A3 (56.3%) was the most frequent in LMW-GS... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Panificação, Tecnologia de alimentos, Cereais - Qualidade, Trigo - Qualidade, Farinha de trigo, Bread industry
Como citar
COSTA, Mariana Souza. Avaliação da qualidade industrial de linhagens de trigo por meio de métodos físico-químicos, reológicos e de panificação. 2013. 152 f. Dissertação (mestrado) - Universidade Estadual Paulista Julio de Mesquita Filho, Instituto de Biociências, Letras e Ciências Exatas, 2013.