Phenotypic and genetic dissection of the contents of important metallic elements in hybrid rice grown in cadmium-contaminated paddy fields
Tengfei Liu,
Wenbin Hu,
Lvshui Weng,
Lihua Deng,
Jinjiang Li,
Jianghui Yu,
Zheng Zhou,
Ye Liu,
Caiyan Chen,
Teng Sheng,
Zhenghong Zhao,
Guoying Xiao
Affiliations
Tengfei Liu
Hunan Rice Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China
Wenbin Hu
Hunan Rice Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China
Lvshui Weng
Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
Lihua Deng
Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
Jinjiang Li
Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
Jianghui Yu
Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
Zheng Zhou
Hunan Rice Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China
Ye Liu
Hunan Rice Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China
Caiyan Chen
Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China; Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
Teng Sheng
Laboratory of Photosynthesis and Environmental Biology, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China; Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China
Zhenghong Zhao
Hunan Rice Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China; Corresponding author.
Guoying Xiao
Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China; Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, 100101, China; Corresponding author. Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China.
Rice (Oryza sativa 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.
