Identification of introgression lines of Oryza glaberrima Steud. with high mineral content in grains
Identification of introgression lines of Oryza glaberrima Steud. with high mineral content in grains
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DOI：
10.1080/00380768.2016.1204896
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发表时间：
2016-01-01
影响因子：
2
通讯作者：
Fujiwara, Toru
中科院分区：
文献类型：
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作者：
Ohmori, Yoshihiro;Sotta, Naoyuki;Fujiwara, Toru
谷物中的矿物质浓度对人类健康至关重要，特别是对那些以谷物为主食的人来说。虽然水稻（Oryza sativa L.）是世界上最重要的主要作物之一，但淀粉构成了其谷物的很大一部分，矿物质浓度低于其他主要作物。一种解决方案是通过生物强化来改善稻米中的矿物质浓度，而这种方法需要对赋予稻米高矿物质浓度的遗传资源进行调查。在本研究中，我们在2012年和2013年进行了为期2年的田间试验，测定了40个由粳稻品种台中65 （T65）与非洲稻Oryza glaberrima Steud杂交而成的渗入系的水稻籽粒中钠（Na）、镁（Mg）、磷(P)、钾(K)、钙（Ca）、硼(B)、锰（Mn）、铁（Fe）、铜（Cu）、锌（Zn）和钼（Mo）的浓度。在40个渗透系中观察到矿物浓度的显著变化。我们选择了几个矿物质含量显著高于栽培水稻T65的优良品系，包括铁、铜、锌、钼、镁、磷和钙。这些品系可能是生物强化育种的新材料，并为我们提供了水稻籽粒中高矿物质含量的候选基因座的位置信息。
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.