Effect of grain discoloration of quality parameters of rice Sumangala K., Patil M. B., Nargund V. B., Ramegowda G. Department of Plant Pathology, College of Agriculture, Raichur, Karnataka *Department of Plant Pathology, College of Agriculture, Bheemarayanagudi, Karnataka Abstract Rice seeds of variety sonamahsuri was tested for chemical and physical characters in relation to grain discoloration. The higher protein (8.0%) and ash (0.000222%) content was found in discoloured grain in comparison to healthy seeds with protein and ash content of 7.5 and 0.00016 per cent respectively. Whereas moisture (0.0089%), fat (0.0023%) and carbohydrates (91.98%) levels were less in discolored grains compared to healthy grains with 0.0041, 0.0027 and 92.48 per cent moisture, fat and carbohydrates respectively. The discolored grains also showed the less seed weight (13.10g), volume (24.28) and density (0.53) as compared to healthy grains with higher seed weight (14.85g), volume (25.22) and density (0.57). The increased broken rice (68.2g) was noticed with discolored grains in comparison to healthy grains (13.13g). Discolored grains also recorded higher endosperm chalkiness and low gelatinization temperature and poor organoleptic values like good aroma, slight tender, less cohesiveness, white and glossy appearance. Top Keywords Grain discoloration, protein, ash, fat, carbohydrates and organoleptic. Top |