重金属汞在玉米不同组织内积累差异性分析

Analysis of Mercury Accumulation in Different Tissues of Maize

玉米吸收土壤中的重金属汞并积累在食用部分,通过食物链威胁动物及人类健康。为研究玉米对重金属汞的吸收、积累的基因型差异,筛选玉米重金属汞低积累品种,以230份遗传多样性丰富的优良玉米自交系为材料,分别对2个环境下玉米不同组织内重金属汞的积累进行研究。结果表明,基因型、环境及其互作均达到显著水平;不同组织中汞含量从大到小排序为:叶片>苞叶>茎秆>穗轴>籽粒;同时鉴定出一批汞低积累材料。该研究结果可为玉米汞低积累品种的选育及相关遗传研究提供理论参考和材料基础。

The heavy metal mercury （Hg） in the soil can accumulate in crops, posing a health threat to humans by the food chain. To study the heavy metal mercury absorption and accumulation differences in different maize varieties and tissues, and to select and breed maize lines with low mercury accumulation, the differences of mercury absorption and accumulation were detected using 230 elite inbred lines as materials planted on two environments. The results showed that the Hg concentrations for the five measured maize tissues in the population were significantly affected by environment （E）, genotype （G）, and G x E factors. The Hg concentrations in different maize tissues followed the order： leaves 〉 bracts 〉 stems 〉 axis 〉 kernels. Some low accumulation materials were identified, which will provide material foundation for breeding maize variety with low accumulation and genetic research.