MOLECULAR MARKER OF CADMIUM ACCUMULATION IN RICE AND APPLICATION THEREOF IN IMPROVING CADMIUM ACCUMULATION IN RICE GRAINS

摘要

Disclosed are a molecular marker of cadmium accumulation in rice and an application thereof in improving cadmium accumulation in rice grains. The disclosed molecular marker of cadmium accumulation in rice is a DNA fragment in the 8899129-9307609 region of rice chromosome 7, which is lcrf1 or lcrf2, lcrf1 is a DNA fragment shown in 8899129-9307609 of rice chromosome 7, and lcrf2 is a DNA fragment represented by SEQ ID No. 1 in the sequence listing. It has been discovered in the present invention that the molecular marker of cadmium accumulation in rice is related to cadmium accumulation in rice grains. The molecular marker of cadmium accumulation in rice is homozygous rice represented by SEQ ID No. 1 in the sequence listing, which has the characteristics of low cadmium accumulation in grains when planted in high cadmium polluted fields. Therefore, the DNA fragment can be introduced into other backgrounds by breeding methods such as hybridization and backcrossing to breed new rice varieties that have low accumulation of cadmium in grains.