Assessment of “in vitro” propagation potential for some Gloxinia (Sinningia speciosa) genotypes.

Gloxinia (Sinningia speciosa Hierm) belongs to the family Gesneriaceae and is a commercially important ornamental plant. Gloxinia produces single or double flowers that are available in a variety of colors. This plant can be traditionally propagated by leaf, stem, rhizome, seed, and crown cuttings from a mature plant after blooming. The biological material was composed of five genotypes of Gloxinia (Sinningia speciosa): Kaiser Wilhelm; Kaiser Friedrich; Mont Blanc; Prince Albert; hybrid MA. The aim of this study was to investigate the in vitro regeneration potential of different Gloxinia genotypes on different hormonal balances, in order to further increase the efficiency of their multiplication rate. The hormonal balance has the highest contribution on the variability of this trait (85.73%), followed by the genotype (5,51 %), while the culture duration had a lower contribution of 2.24 %. Kaiser Friedrich variety recorded average values of shoots number/explant significantly higher to other genotypes. The balance BA4+ANA0.1 proved to be the most effective for the initiation and formation of shoots, thus resulting statistically assured increases of shoots number/explant compared to the other studied hormonal combinations.