Comparative Assessment of Proximate, Mineral and Anti-Nutritional Component of Indigenous and Foreign Rice in Ado-Odo Ota Local Government Area of Ogun State, Nigeria

Rice (Oryza sativa) is a popular staple food in Nigeria. A comparative analysis of one foreign and four indigenous rice consume in Ado-Odo Ota Local Government, Southwest Nigeria were investigated. The proximate compositions (moisture, total ash, crude protein, crude fat, crude fibre and carbohydrate) were estimated using AOAC method. The phytate and oxalate were determined by titrimetry while trypsin inhibitor was determined with Spectrophotometer. The mineral element contents (Ca, Fe, K, Mg, Na, Cu, Mn, Zn, Cd and Cr) were determined using the inductively Coupled Plasma- Optical Emission Spectrophotometer (ICP-OES) after the samples were digested. The highest protein content was observed in the foreign rice with 8.59%, carbohydrate content was highest in the Ofada rice (80.64%). Crude fat, crude fibre and ash values ranges from 0.30-1.07%; 1.17-1.79%; 0.37-1.18% respectively. Mineral contents were significantly higher in the indigenous rice than the foreign rice variety while Cd and Cr were not detected in all the rice samples. Phytate, Oxalate and Trypsin inhibitor were higher in the foreign rice samples than the indigenous rice samples. These results provide the information needed for improving the consumption of the indigenous rice among Nigerian citizens.

Keywords: Rice, Proximate composition, Minerals, Anti-Nutrition.