Periódicos Brasileiros em Medicina Veterinária e Zootecnia

p. 2443-2452

Organogenesis and plant selection by kanamycin of strawberry in vitro aiming at genetic transformation

Reis, LetíciaAntônio Ayub, Ricardo

The success of genetic transformation of the strawberry (Fragaria x ananassa) is strongly influenced by the cultivar and depends on efficient regeneration and plant-transformed selection. In plant regeneration, efficient organogenesis depends on the concentrations of plant growth regulators that are present in the culture medium, and the response varies according to the explant type and cultivar. Similarly, in the selection of transformed plants, the sensitivity to selective agents induced by marker genes depends on the concentration of the selective substance in the regeneration medium and must be adjusted according to the chosen cultivar. The aim of this work was to test different combinations and concentrations of TDZ (Thidiazuron) and IBA (indolebutyric-acid) added to the base medium MS (MURASHIGE; SKOOG, 1962) for shoot regeneration of Camiño Real and Festival cultivars from leaf and petiole explants. In the case of Camiño Real, 1.0, 1.5 and 2.0 mg L-1 of TDZ combined with 0.1, 0.3 and 0.5 mg L-1 of IBA were tested. In the case of Festival, 1.0, 1.5 and 2.0 mg L-1 of TDZ combined with 0.1 and 0.3 mg L-1 of IBA were evaluated. Another aim was to define the lowest concentration of the selective agent Kanamycin (marker gene npt II) able to inhibit regeneration of the untransformed shoots. For this purpose, Kanamycin doses of 0, 2, 4, 6, 8 and 10 mg L-1 were added to the p

Texto completo