Understanding the chapatti making attributes of the Indian wheats – II: The rheological basis
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Abstract
The concept of good chapati varies from individual to individual and depends mainly on the rheological properties of the dough used to prepare the chapaties. The research project was largely built around two type of plant meterials, the tall traditional cultivars of the pre-dwarfing era, and three backcross recombinant populations (BC1F5 generation) C 273/PBW 343//PBW 343 (70 lines), C 306/PBW 534//PBW 534 (70 lines) and C 518/PBW 343//PBW 343 (80 lines). Association of traits studied with chapati score in set of cultivars and genetic stocks Starch pasting characteristics showed mild negative correlation with chapati quality, which is again contrasting, to the requirements of bread making. The correlations were not consistent over years possibly due to environmental factor (temperature, rainfall, fertilizer and irrigations etc.) and due to change in the constitution of the set. Similarly mixographic traits showed negative association chapati making quality. The correlations which prevail in the populations carry much greater weight as these have persisted over several rounds of recombination and are likely to reflect under lying causes of superior chapati quality. As various components of chapati quality would be disassembled, the relative levels of correlations for individual traits would be uncovered. Among the starch pasting characteristics, final viscosity and setback were consistently negatively associated with the chapati making quality. In case of the mixographic traits, mixing tolerance index is negatively associated whereas rate of dough development has consistent positive correlation with chapati quality.
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Chapati making quality, Mixograph, Rheological properties, Starch pasting, Wheat
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