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首页> 外文期刊>The Science of the Total Environment >Variations in grain cadmium and arsenic concentrations and screening for stable low-accumulating rice cultivars from multi-environment trials
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Variations in grain cadmium and arsenic concentrations and screening for stable low-accumulating rice cultivars from multi-environment trials

机译：多种环境试验中稳定低积累水稻品种的镉，砷浓度变化及筛选

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摘要

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 x 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. (C) 2018 Elsevier B.V. All rights reserved.
机译：为了帮助减轻中国水稻土中广泛的镉（Cd）和砷（As）共污染，已广泛采用了低积累水稻（Oryza sativa L.）品种（排除品）的筛选和育种。但是，水稻品种对Cd和As积累的表现在不同的生长环境下可能会有所不同。无法确定稳定的低积累品种已经极大地阻碍了它们的应用。在这项研究中，在中国广东省北部的两个作物季节中，在四个受镉和砷污染的稻田中评估了51个水稻品种。目的是研究品种，环境及其相互作用对确定谷物中Cd和As浓度的影响，从而确定稳定的低积累品种。结果表明，环境影响主导了稻米中Cd和As的浓度，解释了总变化的87％。作物季节起着至关重要的作用。与早期相比，后期Cd含量增加，As含量明显降低。观察到不同品种之间的籽粒镉，总砷，无机砷浓度和无机砷百分比存在较大差异。与j稻品种相比，常规粳稻品种的Cd含量较低，但As含量较高。品种x环境相互作用（CEI）是显着的，其重要性与品种效应相当。通过测量和解释这种相互作用，可以根据产量，籽粒Cd和As水平以及在整个试验环境中品种的稳定性来确定稳定的Cd和As排斥品种。在杂交in稻品种中发现了两个稳定的Cd和As共排毒剂。这些结果表明，谷物中Cd和As浓度的变化可能主要归因于环境影响，品种选择实践应包括对CEI的分析，以鉴定稳定的低积累水稻品种。 （C）2018 Elsevier B.V.保留所有权利。

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  • 来源
    《The Science of the Total Environment》 |2018年第1期|1314-1324|共11页
  • 作者

    Chi Yihan; Li Fangbai; Tam Nora Fung-yee; Liu Chuanping; Ouyang Yun; Qi Xiaoli; Li Wai Chin; Ye Zhihong;

  • 作者单位

    Sun Yat Sen Univ, Sch Life Sci, Guangzhou 510006, Guangdong, Peoples R China;

    Guangdong Inst Ecoenvironm Sci & Technol, Guangdong Key Lab Integrated Agroenvironm Pollut, Guangzhou 510650, Guangdong, Peoples R China;

    City Univ Hong Kong, State Key Lab Marine Pollut, Dept Chem, Kowloon, Hong Kong, Peoples R China;

    Guangdong Inst Ecoenvironm Sci & Technol, Guangdong Key Lab Integrated Agroenvironm Pollut, Guangzhou 510650, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Life Sci, Guangzhou 510006, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Life Sci, Guangzhou 510006, Guangdong, Peoples R China;

    Educ Univ Hong Kong, Dept Sci & Environm Studies, Hong Kong, Hong Kong, Peoples R China;

    Sun Yat Sen Univ, Sch Life Sci, Guangzhou 510006, Guangdong, Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Rice (Oryza sativa L.); Cultivar selection; Cadmium; Arsenic; Food safety; Excluder cultivars;

    机译：水稻;品种选择;镉;砷;食品安全;Exluder品种;

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