Abstract:

To limit cadmium(Cd) accumulation in the wheat grain, the experiment was conducted to study Cd accumulation in grain among 102 different wheat cultivars or materials. The results showed that Cd concentrations of 73.53% wheat grain varied from 4 mg/kg to 7 mg/kg in soil with 20 mg/kg Cd, the Cd concentration of 17.65% of the wheat varieties grain was above 7 mg/kg, and 8.82% was below 4 mg/kg. And then 9 low-cadmium-accumulation(LCA) wheat material and 16 high-cadmium-accumium-accumulation ones were choosen to further study Cd concentration in wheat grain under 0.4 mg/kg, 5 mg/kg and 20 mg/kg Cd soil. The results Cd accumulation in different wheat grains demonstrated remarkable inter-species difference in heavy Cd contaminated soils. Concentrations of Cd in soil were closely positive related to Cd concentrations in grain, and were negatively related to phyto-accumulation facor (PAF) of Cd in grain. At the same time, the three LCA wheat materials were chosen. Therefore, the results in this study were significant in selecting or breeding wheat varieties with low Cd accumulation, understand the regulation of Cd accumulation in grain and so on.