Liu Tengfei, Hu Wenbin, Weng Lvshui, Deng Lihua, Li Jinjiang, Yu Jianghui, Zhou Zheng, Liu Ye, Chen Caiyan, Sheng Teng, Zhao Zhenghong, Xiao Guoying
Hunan Rice Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China.
Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China.
Heliyon. 2023 Sep 9;9(9):e19919. doi: 10.1016/j.heliyon.2023.e19919. eCollection 2023 Sep.
Rice ( L.) is a staple food that feeds over half of the world's population, and the contents of metallic elements in rice grain play important roles in human nutrition. In this study, the contents of important metallic elements were determined by ICP-OES, and included cadmium (Cd), zinc (Zn), manganese (Mn), copper (Cu), iron (Fe), nickel (Ni), calcium (Ca), and magnesium (Mg) in brown rice, in the first node from the top (Node 1), in the second node from the top (Node 2), and in roots of 55 hybrids and their parental lines. The heritability of metallic element contents (MECs), the general combining ability (GCA) for MEC, and the correlation between MECs in different organs/tissues of hybrids were also analyzed. The results indicated that: (1) there was a positive correlation between the contents of Cd and Zn in nodes and roots, but a negative correlation between the contents of Cd and Zn in brown rice of the hybrids(2) the GCA for MECs can be used to evaluate the ability of the parental lines to improve the metal contents in brown rice of the hybrids(3) the contents of Cd, Zn, Ca, and Mg in brown rice were mainly affected by additive genetic effects(4) the restorer lines R2292 and R2265 can be used to cultivate hybrids with high Zn and low Cd contents in the brown rice.
水稻（Oryza sativa L.）是一种主食，养活了世界一半以上的人口，水稻籽粒中的金属元素含量对人类营养起着重要作用。在本研究中，采用电感耦合等离子体发射光谱法（ICP - OES）测定了55个杂交种及其亲本糙米、顶部第一节（第一节）、顶部第二节（第二节）和根中镉（Cd）、锌（Zn）、锰（Mn）、铜（Cu）、铁（Fe）、镍（Ni）、钙（Ca）和镁（Mg）等重要金属元素的含量。还分析了金属元素含量（MECs）的遗传力、MEC的一般配合力（GCA）以及杂交种不同器官/组织中MECs之间的相关性。结果表明：（1）杂交种节点和根中Cd和Zn含量呈正相关，但糙米中Cd和Zn含量呈负相关；（2）MECs的GCA可用于评估亲本提高杂交种糙米中金属含量的能力；（3）糙米中Cd、Zn、Ca和Mg含量主要受加性遗传效应影响；（4）恢复系R2292和R2265可用于培育糙米中Zn含量高、Cd含量低的杂交种。
