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<p>Arsenic (As) is a toxic environmental pollutant and a group-1 carcinogen, posing serious concern for human health. Rice and rice-based food products are considered as one of the major sources for As contamination into the human food-chain. Hence, world-wide concerted research efforts are going on, either to identify and/or develop low-As accumulating rice genotypes. The present study evaluated the natural accessions of rice, comprising of landraces and farmer’s varieties, under the naturally As-contaminated sites of Chhattisgarh, India, which is well-known for its richness in terms of rice production as well as varietal diversity. The wide-range spectrum of grain-As was obtained in 120 selected genotypes, with 90 and 81 accessions having As-accumulation above the WHO permissible limit for white (0.2&#xa0;mg&#xa0;kg<sup>−1</sup>) and brown (0.3&#xa0;mg&#xa0;kg<sup>−1</sup>) rice, respectively. The lowest grain-As accumulation among the varieties was seen in cultivated varieties (Badsabhog Sel 1 and Bahadur Sel 1) and landraces (Bastul and Kanaklata), which can be either cultivated or used as&#xa0;suitable donor in breeding programs. Among different agronomic traits, the plant height was identified as most-responsive parameter for assessing As-toxicity. The comparative assessment of agro-morphological traits although showed variations under naturally As-contaminated site; however, no significant correlation was seen in terms of grain-As accumulation, indicating the complexity for on-site field screening of low As-accumulating genotypes. Taken together, the results identified the potential low-As accumulating genotypes and highlighted the grain-As accumulation, as a complex multi-genic trait.</p>

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Grain arsenic accumulation is independent of agronomic traits in rice under field conditions

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月21日

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  • Parminder Singh Saini,
  • Manish Pandey,
  • Samrath Baghel,
  • Suraj Patil,
  • Parmeshwar Kumar Sahu,
  • Vinay Kumar,
  • Bikram Kishore Das,
  • Deepak Sharma,
  • Ashish Kumar Srivastava

摘要

Arsenic (As) is a toxic environmental pollutant and a group-1 carcinogen, posing serious concern for human health. Rice and rice-based food products are considered as one of the major sources for As contamination into the human food-chain. Hence, world-wide concerted research efforts are going on, either to identify and/or develop low-As accumulating rice genotypes. The present study evaluated the natural accessions of rice, comprising of landraces and farmer’s varieties, under the naturally As-contaminated sites of Chhattisgarh, India, which is well-known for its richness in terms of rice production as well as varietal diversity. The wide-range spectrum of grain-As was obtained in 120 selected genotypes, with 90 and 81 accessions having As-accumulation above the WHO permissible limit for white (0.2 mg kg−1) and brown (0.3 mg kg−1) rice, respectively. The lowest grain-As accumulation among the varieties was seen in cultivated varieties (Badsabhog Sel 1 and Bahadur Sel 1) and landraces (Bastul and Kanaklata), which can be either cultivated or used as suitable donor in breeding programs. Among different agronomic traits, the plant height was identified as most-responsive parameter for assessing As-toxicity. The comparative assessment of agro-morphological traits although showed variations under naturally As-contaminated site; however, no significant correlation was seen in terms of grain-As accumulation, indicating the complexity for on-site field screening of low As-accumulating genotypes. Taken together, the results identified the potential low-As accumulating genotypes and highlighted the grain-As accumulation, as a complex multi-genic trait.