High-frequency shoot regeneration from cotyledon explants of watermelon cv. sugar baby

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SummaryA protocol for in vitro shoot regeneration from cotyledon explants of Citrullus lanatus (Thunb.) Matsum. & Nakai cv. Sugar Baby is described. The cotyledons excised from 7-d-old aseptic seedlings showed the highest percentage of shoots on Murashige and Skoog (MS) + N6-benzyladenine (BA; 3.0 μM) + N6-[2-isopentenyl] adenine (2iP; 3.0 μM) and MS + BA (3.0 μM) + indole-3-acetic acid (IAA; 3.0 μM). Whereas the latter medium induced shoot regeneration after the callusing of the explant, the former stimulated direct shoot formation. The regenerated shoots were rooted and the resulting plants were established in earthen pots with 55% success.

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