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An efficient plant regeneration protocol was developed from leaf explants of Aloe barbadensis Mill on Murashige and Skoog's (MS) medium supplemented with 2.0 mg/l 6-benzyladenine (BA) or Kinetin (Kn), 0.25-0.5 mg/l NAA (1-napthalene acetic acid) and 3 % (w/v) sucrose within 4 weeks of culture. The maximum number of shoot buds were obtained on MS medium supplemented with 2.0 mg/l BA, 0.5 mg/l NAA, 40 mg/l Ads (adenine sulphate) within 4-6 weeks of subculture. Inclusion of 0.25-0.50 mg/l gibberellic acid into the medium, the shoot buds became elongated. Repeated subculture on regeneration medium induces higher rate of shoot regeneration. The root induction from excised microshoots was achieved on half-strength MS medium supplemented with 0.25-1.0 mg/l NAA or indole-3-butyric acid (IBA) and 2 % (w/v) sucrose. Maximum percentage of rooting was achieved on medium having 0.5 mg/l NAA with 3 % (w/v) sucrose. About 80 % of in vitro raised plantlets were hardened in the greenhouse and successfully established in the soil. Both Random Amplified Polymorphic DNA (RAPD) and Inter Simple Sequence Repeat (ISSR) markers were used to detect the variability among the regenerated plants developed in vitro. The results showed that there was no polymorphism among the regenerated plantlets. This study will help for propagation of quality planting material of Aloe barbadensis for commercialization.

Plant regeneration from leaf explants of Aloe barbadensis Mill. and genetic fidelity assessment through DNA markers