Abstract The most common goal for rice breeding is to improve the nutritional content and to reduce toxic components. Fourteen varieties of rice were grown for this purpose in six microclimatic regions in southern Brazil. The elemental composition of rice and As-Species were measured by ICP-MS and HPLC-ICP-MS, respectively. Intra- and inter-species variations of essential and non-essential elements in husked grains from an important rice-producing region in Brazil are presented. Arsenic, Cd, Co, Cu, Fe, Mg, Mn, Ni, Se, and Zn were significantly affected by the microclimatic region and the rice varieties. The only exception observed was the effect of Pb variety selection, with 35.4 % associated with random fluctuations. Varieties with both higher levels of Fe/Zn and lower levels of As/Cd were identified in all regions studied. All regions and varieties were able to produce rice with Cd

中文翻译：

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巴西南部各个小气候区种植的水稻品种矿物质含量的内部和内部变异

摘要 水稻育种最常见的目标是提高营养成分和减少有毒成分。为此在巴西南部的六个小气候区种植了 14 种水稻。大米和 As-Species 的元素组成分别通过 ICP-MS 和 HPLC-ICP-MS 测量。介绍了巴西一个重要水稻产区的去壳谷物中必需和非必需元素的种内和种间变异。砷、镉、钴、铜、铁、镁、锰、镍、硒和锌受小气候区和水稻品种的显着影响。观察到的唯一例外是铅品种选择的影响，其中 35.4% 与随机波动相关。在所有研究区域都发现了具有较高 Fe/Zn 水平和较低 As/Cd 水平的品种。