In this paper, we studied genetic variation of cadmium contents in leaves and twigs of 158 arbor willow clones.Results are as follows: Cadmium contents are in range of 27.50—142.16 mg/kg in twigs of different tested clones, while they are in range of 29.41—242.63 mg/kg in leaves of tested clones.There were no significant differences among 6 major hybrids in cadmium contents in leaves or twigs.There were significant correlations between cadmium contents in leaves and those in twigs for each hybrid.Cadmium contents in leaves were higher than those in twigs for most clones, with the average content ratio values of leaves to twigs at 1.2. The results suggested that selection of new willow varieties with higher cadmium contents in twigs or leaves could be available through direct test on cadmium absorption characters for different clone.
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