Development of specific molecular markers for medicinal peony () with double flower.

In China, medicinal with double flowers (DFs) does not produce seeds, yet it possesses significantly higher paeoniflorin content compared with its single-flowered counterpart. The propagation of medicinal with DFs relies solely on rhizomes. However, due to economic motivations, the rhizomes of medicinal with single flowers (SFs) are often mixed with those of medicinal with DFs.