Malays. Appl. Biol. (2017) 46(4): 55–62
STUDY OF BIOCHEMICAL AND COOKING QUALITY TRAITS
OF MAJOR RICE VARIETIES OF BANGLADESH
SHOZIB, H.B.1*, HOSSAIN, M.M.2, JAHAN, S.3, ALAM, M.S.4, DAS, S.C.4, ALAM, S.4, AMIN, R.B.4,
HASAN, M.M.4, MALO, R.6, ISLAM, M.R.5, SHEKHAR, H.U.2 and SIDDIQUEE, M.A.1
1Grain Quality and Nutrition, Bangladesh Rice Research Institute (BRRI), Gazipur-1701, Bangladesh
2Department of Biochemistry and Molecular Biology, Dhaka University, Dhaka-1000, Bangladesh
3Department of Applied Statistics, East West University, A/2, Jahurul Islam City Gate, Aftab Nagar,
4Department of Biochemistry and Molecular Biology, Tejgaon College, Tejgaon 16,
Indira Road, Dhaka-1215, Bangladesh
5Department of Genetic Engineering and Biotechnology University of Chittagong, Bangladesh
6Child Health Research Foundation, Mirpur Child Hospital, Borobug, Mirpur 2, Dhaka, Bangladesh
*Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Accepted 23 November 2017, Published online 31 December 2017
ABSTRACT
A total of eight BRRI inbreed high yielding rice varieties (HYVs) were subjected to evaluate both physicochemical and biochemical characterization. Nutritional quality, mineral profiling, molar ratio of phytate to minerals, starch digestion, glycemic index (GI) of all selected HYVs were tested along with their physicochemical parameters in this study. The data revealed that BR16 is a low GI rice variety (GI 52.4) with the highest content of both ?-amylase inhibitory activity (122 ?g/g AE) and resistant starch (RS) of 4.68% among all tested HYVs. It was found that GI has a negative correlation (-0.796*) with apparent amylase content (AAC); RS has shown a positive correlation (0.836**) with ?-amylase inhibitory activity (AAIA) and AAC has positive correlation (0.787*) with imbibitions ratio (IR) of rice. So, for better explanation of GI value of a particular variety, it is necessary to consider a group of parameters consisting of AAIA, IR, RS content along with AAC. In terms of bioavailability of micronutrients such as Zn and Fe, molar ratio of Phytic acid (PA) was evaluated to respective minerals. Regarding molar ratio of PA/Fe and PA/Zn we have found BRRI dhan53 and BRRI dhan62 are suitable for mineral intake of Fe and Zn respectively among other tested HYVs. This information might possibly be helpful for generating breeding materials specially for low GI and micronutrient enriched rice (MER) breeding programs in Bangladesh.
Key words: Rice varieties, resistant starch, glycemic index, alpha amylase inhibitory activity, apparent amylose content, imbibition ratio
