The use of the japanese apricot (Prunus mume Sieb & Zucc.) as rootstock of Prunus sp. has raised a great interest due to its rusticity, resistance to plagues and diseases, adaptation and mainly for reducing the peach and nectarines trees scales. This essay was carried out at the Department of Vegetable Production of the FCAV/UNESP, Jaboticabal Campus, São Paulo State, Brazil, with the purpose of studying the vegetative propagation of this specie. It has been used herbaceous cuttings with 12cm of length originating from the Clones 02, 05, 10 and 15. These clones have been obtained at the Program of Genetic Improvement of the Instituto Agronômico de Campinas, Brazil. The herbaceous cuttings have been submitted to the following concentrations of indolbutiric acid 0 and 2000mg.L-1 by five seconds. The experiment was conducted in a completely randomized design with 4 repetitions of 20 cuttings by replication, with a 4 levels clone factor (02, 05, 10 and 15 clone) and 2 IBA levels (0 and 2000mg.L-1). According to the results, it has been detected significantly difference between the clones in relation to the rooting percentage. The Clone 15 has developed a rooting percentage significantly higher than the Clone 02 (93,75% and 78,13%, respectively). The Clones 05 (85,0%) and 10 (83,13%) have showed an average performance and not differed from the others. There was no difference between the clones tested in relation to the callus formation, root per cutting, length of root and percentage of sprouted cuttings. The acid indolbutiric at the concentration of 2000mg.L-1 had a beneficial effect over the rooting of the cuttings. It has favored the emission of adventitious roots and it has increased the length of the roots. However it hasn't influenced the sprouted of the cuttings. It hasn't been detected interaction between the factors tested for the analyzed variables.
rooting; rootstock; indolbutiric acid
