| Summary: | Eucalypt hybrids clones generation from selected parents adapted to the Mesopotamian region will allow to extend the forest frontiers as well as the supply of wood products. A hybrid is operationally useful only if its cloning is feasible; for this reason, the objective of this work was to characterize rooting ability of the hybrids clones of E. grandis x E. tereticornis and E. grandis x E. camaldulensis by the apical minicuttings with Indolbutyric acid (IBA) technique. Rooting percentage was evaluated in 6 apical minicuttings of hybrid clones of Eucaliptus at 50 days from induction. The experiment was performed with a completely randomized design with 3 repetitions. GC-INTA-9 clone showed a significant rooting superiority (84±19.75 %), while GC-INTA-12 and GC-INTA-27 presented similar values to each other, with 59±3,47 and 58±6,56 rooting percentage respectively. On the other hand, the clone GT-INTA 31 of the hybrid E. grandis x E. tereticornis showed the best performance with a 68±8.56% of rooting against GT-INTA 44 which has 43±16.81%. Finally, GT-INTA 37 with 8±10.37% has demonstrated the lowest capacity of rooting among interspecific hybrids studied. These results demonstrate that there is a wide variation in rooting ability and/or survival associated with the genotype of the clones used.
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