EVALUATION OF IRON AND ZINC ENRICHED RICE (Oryza sativa L.) GENOTYPES IN DIFFERENT LOCATIONS OF BANGLADESH

  • M.S.R. Khanom Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202

    M.H. Rani Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202

    M.H.S. Rahman Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202

    S.A. Shammy Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202

    A.C. Sharma Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh-2202

    M.W. Akram Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202

    S.N. Begum Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202

    M.M. Islam Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202

Abstract

Malnutrition among women and children are extremely prevalent in Bangladesh. Bangladeshi children become stunted and underweight due to micronutrients deficiencies particularly iron (Fe) and zinc (Zn). Anemia is also highly prevalent among children and women in the country due to Fe deficiency. Biofortification of rice (Oryza sativa L.) with micronutrients is widely recognized as a sustainable strategy to alleviate human Fe and Zn deficiencies in Bangladesh where rice is the staple food. With this view, four advanced brown rice genotypes: IZSD-10, IZSD-26, IZSD-44 and IZSD-45 along with Binadhan-20 as check variety were analyzed for grain Fe and Zn concentration using energy Dispersive X-ray Fluorescence Spectrophotometer (ED-XRF). Advanced yield trial was conducted in three different locations of Bangladesh during Aman season of 2020 in a randomized complete block design (RCBD) with three replications in each location. The Fe concentration varied from 9 to 15 mg kg-1 and 1 to 4 mg kg-1 whereas Zn concentration ranged from 45 to 59 mg kg-1 and 29 to 40 mg kg-1 in unpolished and polished rice, respectively. Almost higher Fe loss (~60 to 94 %) was observed compared to Zn (~18 to 42%) at 10% polishing throughout the grain shape that was responsible due to loss of embryo, pericarp and aleurone layer. Grain yield of IZSD-26 was considerably higher (5.37 t ha-1) but not significantly different at mean over locations. The genotype IZSD-26 and IZSD-10 were matured (116 and 114 days) earlier than the check variety (129 days with yield 5.36 t ha-1). Considering earliness, Fe and Zn content and higher yield, the genotypes IZSD-26 and IZSD-10 might be recommended for further regional yield trial to develop Fe and Zn enriched varieties. Moreover, other genotypes IZSD-44 and IZSD-45 with high Zn concentration were identified, which have the potential to be used in rice improvement for bio fortification.

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Section
Research Article