Efficacy of IBA on Root Regeneration in Some Poplar (Populus deltoids Bartram Ex-Marsh.) Clones

The study was undertaken to study the efficacy of IBA on root regeneration in poplar clones so as to standardize the optimum concentration for poplar clone. It was conducted at the Department of Horticulture, College of Agriculture, Junagadh Agricultural University, Junagadh. The experiment was laid out in a Complete Randomized Design with three replications. Among variousconcentrations of IBA, 600ppm was found significantly superior to increase the number of main roots, number of secondary roots, rooting percentage and survival percentage. Among the poplar clones, PIP206 was found the best with significantly the highest number of main roots, PIP201 was found significantly the highest number of secondary root while the percentage of rooting was significantly the highest in PIP211 and PIP206, and survival percentage of rooted cuttings was significantly the highest in PIP207 followed by PIP201 and PIP206. All the clones had positive and significant interaction with IBA at 600 ppm in almost all the characters.