2. Materials and methods
2.1. Plant material
Plantlets were harvested from the laboratory of South Subtropical Crops Research Institute,
Chinese Academy of Tropical Agriculture Sciences,
originated through shoot proliferation from suckers (20–30 cm) of H.11648.
Most of the leaves of the plantlets were removed,
and only a columnar shoot tip (cut into 3–8 mm segment)
and 5–8 mm basal end of immature leaves were used as the explants.