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FELDBERG, Nelson Pires; BARBOSA, Wilson; MAYER, Newton Alex and SANTOS, Fernanda Motta da Costa. Vegetative propagation of pear rootstocks using semi hardwood cuttings. Rev. Ceres [online]. 2010, vol.57, n.6, pp.810-816. ISSN 0034-737X. http://dx.doi.org/10.1590/S0034-737X2010000600017.
The objective of this work was to evaluate the technical viability of the vegetative propagation of the pear rootstocks'Taiwan Nashi-C', 'Taiwan Mamenashi' (Pyrus calleryana Dcne.) and 'Seleção IAC-1' (Pyrus spp.) using semi-hardwood cuttings. The experiment was conducted in a nursery with an intermittent mist system at the Propagation Center Laboratory of the Botanical Garden, Instituto Agronômico de Campinas (IAC), SP, Brazil. The experiment was arranged in a 3 x 4 factorial scheme (rootstocks x indolebutyric acid doses), with five repetitions of 20 cuttings, in a complete randomized design. Results obtained 60 days after grafting showed that: a) the propagation of 'Taiwan Nashi-C', 'Taiwan Mamenashi' and 'Seleção IAC-1' using semi-hardwood cuttings is technically viable; b) among the studied rootstocks, 'Taiwan Nashi-C' showed the highest rooting percentage, lowest callus percentage, highest root length and root number per cutting; c) rooting of semi-hardwood cuttings required application of indolebutyric acid, and the doses 4000 mg.L-1 and 6000 mg.L-1 provided the highest adventitious rooting; d) the tested doses of indolebutyric acid were not phytotoxic to semi hardwood cuttings of the studied genotypes.
Keywords : Clonal propagation; cuttings; pear; Pyrus calleriana; Pyrus spp.