Identification of barley genotypes with low grain Cd accumulation and its interaction with four microelements
Identification of barley genotypes with low grain Cd accumulation and its interaction with four microelements
复制标题
籽粒镉低积累大麦基因型的鉴定及其与四种微量元素的相互作用。
DOI：
10.1016/j.chemosphere.2006.10.014
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发表时间：
2007-05-01
期刊：
影响因子：
8.8
通讯作者：
Wei, Kang
中科院分区：
文献类型：
--
作者：
Chen, Fei;Dong, Jing;Wei, Kang
为筛选低镉积累的大麦基因型，在相同的田间条件下，研究了600个大麦基因型籽粒镉含量的差异。结果表明，大麦籽粒中Cd含量存在较大的基因型差异，平均含量为0.16mg kg（-1）DW，变异范围为0（未检出）~ 1.21mg kg（-1）DW，有47.2%的大麦籽粒Cd含量超过了谷物中Cd的最高允许浓度（MPC）。此外，两年中不同基因型间的差异基本一致，第二收获年籽粒Cd含量最低的品种是Beitalys和商98-128，比Cd含量最高的两个品种大麦6号和浙农8号低97.5%。大麦Cd含量的基因型差异较大，表明在Cd含量超过MPC的地区，通过品种选育降低大麦Cd含量是可能的。微量元素含量也存在显著的基因型差异。相关性分析表明，大麦籽粒中Cd与Zn、Cu、Fe的积累呈轻微的正相关关系，但只有Mn的积累与Cd的积累具有协同作用。(c)2006爱思唯尔有限公司保留所有权利。
The variation in grain cadmium (Cd) concentrations was evaluated among 600 barley genotypes grown in the same field condition to select low Cd accumulating genotypes. The results showed that there is considerable genotypic variation in grain Cd concentrations in barley grain samples, with the mean concentration of 0.16 mg kg(-1) DW and the variation of 0 (not detected) to 1.21 mg kg(-1) DW, and 47.2% of the grain samples exceeded the maximum permissible concentration (MPC) for Cd in cereal grains. In addition, differences between genotypes over the two years were fairly consistent, and Beitalys and Shang 98-128 showed the lowest grain Cd concentration, being 97.5% lower than that in the two highest Cd accumulators E-barley 6 and Zhenong 8 in the second harvest year. The great genotypic differences in Cd concentrations indicated that it is possible to lower Cd content of barley through cultivar selection and breeding for use at sites where Cd concentration in grain exceeds the MPC. Significant genotypic difference was also found in microelement concentrations. Correlation analysis showed that only Mn accumulation is synergetic with Cd accumulation, despite slightly positive relationship between Cd and Zn, Cu, or Fe in accumulation in barley grains. (c) 2006 Elsevier Ltd. All rights reserved.