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In order to optimize tissue culture conditions for genetic transformation of Miscanthus sinensis , we investigated the effects of different plant growth regulators on callus induction and plant regeneration using mature seeds as explant. Dehusked mature seeds were cultured on MS medium supplemented with 3 to 10 mg/L 2,4-D, dicamba or NAA, 30 g/L sucrose and 750 mg/L MgCl 2 6H 2O. A number of combinations of auxin and cytokinin (BA, kinetin) were also used. MS medium containing 3 mg/L 2,4-D was found optimal for embryogenic callus induction (75.7%) from mature seed. The highest number of plants were regenerated (44.6%) upon transferring the embryogenic callus to MS medium supplemented with 1 mg/L 2,4-D plus 2 mg/L BA. This high efficient plant regeneration system could be useful to use for molecular breeding of new cultivars by genetic transformation. (Key words : Callus, Plant growth regulators, Miscanthus )

Effect of Plant Growth Regulators on Callus Induction and Plant Regeneration from Mature Seed Culture of Miscanthus sinensis