An efficient in vitro propagation protocol for direct organogenesis from root explants of a multi-purpose plant, Broussonetia papyrifera (L.) L’Hér. ex Vent.

•Efficient regeneration system was constructed by using Broussonetia papyrifera root as explants.•The best effect is to use three kinds of hormone at the same time, they cannot work effectively alone.•The explants of this system can obtain a large number of excellent clones in a short time.•It provides a basis for polyploid breeding to improve germplasm resources.