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Variations in grain cadmium and arsenic concentrations and screening for stable low-accumulating rice cultivars from multi-environment trials.
Sci Total Environ. 2018 Dec 01; 643:1314-1324.ST

Abstract

In order to help mitigate widespread cadmium (Cd) and arsenic (As) co-contamination in paddy soils in China, screening and breeding of low-accumulating rice (Oryza sativa L.) cultivars (excluders) have been widely adopted. However, the performance of rice cultivars for grain Cd and As accumulation may vary in different growing environments. The inability to identify stable low-accumulating cultivars has largely hindered their application. In this study, 51 rice cultivars were evaluated at four Cd- and As-contaminated paddy sites in two crop seasons in northern Guangdong Province, China. The aim was to investigate the effects of cultivar, environment and their interactions in determining grain Cd and As concentrations, and so to identify stable low-accumulating cultivars. Results showed that environment effects dominated the Cd and As concentrations in rice grains, explaining 87% of the total variations. The crop season played a vital role; compared to early season, grain Cd levels increased and As levels lowered significantly in late season. Large variations in grain Cd, total As, inorganic As concentrations and the percentage of inorganic As were observed between different cultivars. Conventional japonica cultivars exhibited lower Cd levels but higher As levels in the grains than did indica cultivars. The cultivar × environment interaction (CEI) was significant, and its importance was comparable to the cultivar effect. By measuring and interpreting such an interaction, stable Cd and As excluder cultivars were identified based upon the yield, grain Cd and As levels as well as the stabilities of cultivars across the trial environments. Two stable Cd and As co-excluders were found among the hybrid indica cultivars. These results demonstrated that the variations in grain Cd and As concentrations could mainly be attributed to the environment effects and cultivar selection practices should include the analysis of CEI to identify stable low-accumulating rice cultivars.

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Authors+Show Affiliations

Chi Y
School of Life Sciences, Sun Yat-sen University, Guangzhou 510006, China. Electronic address: chiyihan@mail2.sysu.edu.cn.
Li F
Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou 510650, China. Electronic address: cefbli@soil.gd.cn.
Tam NF
Department of Chemistry, State Key Laboratory in Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region. Electronic address: bhntam@cityu.edu.hk.
Liu C
Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou 510650, China. Electronic address: cpliu@soil.gd.cn.
Ouyang Y
School of Life Sciences, Sun Yat-sen University, Guangzhou 510006, China.
Qi X
School of Life Sciences, Sun Yat-sen University, Guangzhou 510006, China. Electronic address: qixiaoli@mail2.sysu.edu.cn.
Li WC
Department of Science and Environmental Studies, the Education University of Hong Kong, Hong Kong Special Administrative Region. Electronic address: waichin@eduhk.hk.
Ye Z
School of Life Sciences, Sun Yat-sen University, Guangzhou 510006, China. Electronic address: lssyzhh@mail.sysu.edu.cn.

MeSH

ArsenicCadmiumChinaEdible GrainOryzaPlant BreedingSoil Pollutants

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30189548

Citation

Chi, Yihan, et al. "Variations in Grain Cadmium and Arsenic Concentrations and Screening for Stable Low-accumulating Rice Cultivars From Multi-environment Trials." The Science of the Total Environment, vol. 643, 2018, pp. 1314-1324.
Chi Y, Li F, Tam NF, et al. Variations in grain cadmium and arsenic concentrations and screening for stable low-accumulating rice cultivars from multi-environment trials. Sci Total Environ. 2018;643:1314-1324.
Chi, Y., Li, F., Tam, N. F., Liu, C., Ouyang, Y., Qi, X., Li, W. C., & Ye, Z. (2018). Variations in grain cadmium and arsenic concentrations and screening for stable low-accumulating rice cultivars from multi-environment trials. The Science of the Total Environment, 643, 1314-1324. https://doi.org/10.1016/j.scitotenv.2018.06.288
Chi Y, et al. Variations in Grain Cadmium and Arsenic Concentrations and Screening for Stable Low-accumulating Rice Cultivars From Multi-environment Trials. Sci Total Environ. 2018 Dec 1;643:1314-1324. PubMed PMID: 30189548.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Variations in grain cadmium and arsenic concentrations and screening for stable low-accumulating rice cultivars from multi-environment trials. AU - Chi,Yihan, AU - Li,Fangbai, AU - Tam,Nora Fung-Yee, AU - Liu,Chuanping, AU - Ouyang,Yun, AU - Qi,Xiaoli, AU - Li,Wai Chin, AU - Ye,Zhihong, Y1 - 2018/07/04/ PY - 2018/04/24/received PY - 2018/06/21/revised PY - 2018/06/23/accepted PY - 2018/9/8/entrez PY - 2018/9/8/pubmed PY - 2019/3/30/medline KW - Arsenic KW - Cadmium KW - Cultivar selection KW - Excluder cultivars KW - Food safety KW - Rice (Oryza sativa L.) SP - 1314 EP - 1324 JF - The Science of the total environment JO - Sci Total Environ VL - 643 N2 - In order to help mitigate widespread cadmium (Cd) and arsenic (As) co-contamination in paddy soils in China, screening and breeding of low-accumulating rice (Oryza sativa L.) cultivars (excluders) have been widely adopted. However, the performance of rice cultivars for grain Cd and As accumulation may vary in different growing environments. The inability to identify stable low-accumulating cultivars has largely hindered their application. In this study, 51 rice cultivars were evaluated at four Cd- and As-contaminated paddy sites in two crop seasons in northern Guangdong Province, China. The aim was to investigate the effects of cultivar, environment and their interactions in determining grain Cd and As concentrations, and so to identify stable low-accumulating cultivars. Results showed that environment effects dominated the Cd and As concentrations in rice grains, explaining 87% of the total variations. The crop season played a vital role; compared to early season, grain Cd levels increased and As levels lowered significantly in late season. Large variations in grain Cd, total As, inorganic As concentrations and the percentage of inorganic As were observed between different cultivars. Conventional japonica cultivars exhibited lower Cd levels but higher As levels in the grains than did indica cultivars. The cultivar × environment interaction (CEI) was significant, and its importance was comparable to the cultivar effect. By measuring and interpreting such an interaction, stable Cd and As excluder cultivars were identified based upon the yield, grain Cd and As levels as well as the stabilities of cultivars across the trial environments. Two stable Cd and As co-excluders were found among the hybrid indica cultivars. These results demonstrated that the variations in grain Cd and As concentrations could mainly be attributed to the environment effects and cultivar selection practices should include the analysis of CEI to identify stable low-accumulating rice cultivars. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/30189548/Variations_in_grain_cadmium_and_arsenic_concentrations_and_screening_for_stable_low_accumulating_rice_cultivars_from_multi_environment_trials_ DB - PRIME DP - Unbound Medicine ER -