Objective: To design a pair of allele-specific diagnostic primer for authenticating Dendrobium huoshanense from other species of Dendrobium Sw. only by PCR. Methods: Based on rDNA ITS sequences database of D. huoshanense and other species of Dendrobium Sw., an allele-specific diagnostic primer pairs was designed. Diagnostic PCRs were performed using the primer with the total DNAs of 19 original plants from Dendrobium Sw. as templates. The positive was the genuine. Results: When the annealing temperature was raised to 60 °C, the template DNA of...