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Xiaoming Wang, Yongxin Li, Huijie Zeng, Neng Cai, Zhongquan Qiao, Xiangying Wang and Jianjun Chen

Weigela florida (Bunge) A. DC. is a popular flowering shrub adapted to a wide range of environmental conditions. Efficient methods for micropropagation of this species have not been well developed. The present study established a protocol for in vitro shoot culture of W. florida ‘Tango’ after a systematic evaluation of different culture media, cytokinins, and auxins on axillary shoot induction. Single-node stems were cultured on Driver and Kuniyuki Walnut (DKW) medium for initial production of axillary shoots. The shoots were used as explants and cultured on DKW medium supplemented with 8.88 μm 6-benzylaminopurine (BA) and 0.27 μm naphthaleneacetic acid (NAA), resulting in the production of more than six axillary shoots per explant. The axillary shoots could either be used as explants for additional shoot production or be cultured on ½ DKW medium supplemented with 0.25 μm indole-3-butyric acid (IBA) for rooting. Plantlets were transplanted into a substrate with 99% survival rate in a shaded greenhouse. This established method could be used for rapid propagation of W. florida to speed the introduction of new hybrids or cultivars for commercial production.

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Xiaoming Wang, Jianjun Chen, Huijie Zeng, Zhongquan Qiao, Yongxin Li, Neng Cai and Xiangying Wang