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Identification of introgression lines of Oryza glaberrima Steud. with high mineral content in grains

Ohmori, Yoshihiro, Sotta, Naoyuki and Fujiwara, Toru 2016. Identification of introgression lines of Oryza glaberrima Steud. with high mineral content in grains. Soil Science and Plant Nutrition 62 (5-6) , pp. 456-464. 10.1080/00380768.2016.1204896

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Mineral concentrations in cereals are crucial for human health, especially for people who consume cereals as a subsistence diet. Although rice (Oryza sativa L.) is one of most important staple crops in the world, starch constitutes a large portion of its grains, and mineral concentrations are lower than in other staple crops. One solution is the improvement of mineral concentrations in rice grains through biofortification, and this approach requires investigation of genetic resources that confer high mineral concentrations to rice grains. In the present study, we performed 2 years of field experiments, in 2012 and 2013, and determined sodium (Na), magnesium (Mg), phosphorus (P), potassium (K), calcium (Ca), boron (B), manganese (Mn), iron (Fe), copper (Cu), zinc (Zn) and molybdenum (Mo) concentrations in the rice grains of 40 introgression lines derived from a cross between a japonica cultivar, Taichung 65 (T65), and African rice, Oryza glaberrima Steud. Substantial variation in mineral concentrations was observed among the 40 introgression lines. We selected several elite lines that had significantly higher concentrations of minerals, including Fe, Cu, Zn, Mo, Mg, P and Ca than the cultivated rice T65. These lines could be novel potential materials for breeding programs for biofortification and provide us with positional information for the candidate loci in the O. glaberrima genome responsible for high mineral concentrations in rice grains.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Biosciences
Publisher: Taylor & Francis
ISSN: 0038-0768
Date of Acceptance: 20 June 2016
Last Modified: 10 Nov 2021 02:22

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