the relative Cd-reduction rate of polished rice and screened the resources with no significant difference in the annual relative Cd-reduction rate. In addition, 45 SSR markers were used to detect the genetic diversity of 15 rice accessions, in order to identify the resources available for breeding with a great genetic distance and high relative Cd-reduction rate. The results showed that in 2018, Cd content in 15 low-Cd polished rice was lower than cv. Xianwanxian 12. Ten samples represented relative Cd-reduction rate of more than 50%, ranging from 50.8% to 83.5%, while 5 samples were less than 50%, ranging from 1.9% to 49.8%. In 2019, the relative Cd-reduction rate in 7 rice samples with similar growth period was higher than 50%, variable from 60.1% to 78.7%. Based on the two-year test results, no significant difference was found among four low-Cd rice samples 7 (BS82), 14 (X211), 19 (7W172), 20 (7W216), and the relative Cd-reduction rate was higher than 50%. The overall genetic diversity in 15 low Cd-accumulating rice population indicated relatively abundant (Na=4.311, Ne=3.257, Ho=0.041, He=0.657, I=1.207, Nei's=0.639, PIC=0.612). The mean genetic similarity (GS) was 0.377, suggesting distant genetic relationship. For examples, the GS in pairs of samples 7 and 14, samples 7 and 19 (20) as well as samples 14 and 19 (20) were 0.319, 0.447 and 0.426, respectively. Therefore, four rice germplasm resources