Abstract:Some characters of unknown dsRNAs isolated from radish were identified. The dsRNAs could be detected from some radish plants and their offspring by dsRNAs analysis approach. The dsRNAswere separated into two fragments in polyacrylamide gel, named dsRNA1 and dsRNA2, respectively with their sizes of approximately 118 kbp. Full-length cDNA of dsRNA1 was obtained by single primer amplification technique, and its size of 1 866 ntwas determined. RT-PCR also showed that dsRNA1 was of radish plant origin. The results of BLASTP suggested that the biggest putative ORF1 was distantly related to RNA dependent RNA polymerase encoded by some species of Partitivirus. The molecular aspects of dsRNAs, and some biological characters of plants, seem related to radish yellow edge virus (RYEV) previously described.