Objective: To research the hereditary stability of Dendrobium huoshanense which were subcultured 7-8 times in the same tissue culture system.Method: Using three primers of arbitrary decamer oligonucleotide sequences from 20 primers for DNA amplification,random amplified polymorphic DNA(RAPD) were performed.Result: The genetic similarity coefficient was varied from 85.4% to 98.4%.The variation of protocorm,germination and monoleaf were rather more notable than that of bileaf and inflorescence.Conclusion: The...