___________________________ Corresponding author: Slađan Adžić, Institute for Vegetable Crops, Karadjordjeva 71, 11420 Smederevska Palanka, Serbia,e-mail: sladjan.adzic@gmail.com, Phone: +381 26 317170, +381 64 8834 413 UDC 575.630 https://doi.org/10.2298/GENSR2003263A Original scientific article INFLUENCE OF DIFFERENT ENVIRONMENTAL CONDITIONS AND GIBERELLIC ACID TREATMENT ON FLOWERING TIME OF DIVERGENT GENOTYPES OF CABBAGE (Brassica oleracea var. capitata L.) AND THEIR F1 HYBRIDS Slađan ADŽIĆ*, Zdenka GIREK, Suzana PAVLOVIĆ, Bogoljub ZEČEVIĆ, Jelena DAMNJANOVIĆ, Dejan CVIKIĆ, Milan UGRINOVIĆ Institute for Vegetable Crops, Smederevska Palanka, Serbia Adžić S., Z. Girek, S. Pavlović, B. Zečević, J. Damnjanović, D. Cvikić, M. Ugrinović (2020). Influence of different environmental conditions and gibberellic acid treatment on flowering time of divergent genotypes of cabbage (Brassica oleracea var. capitata L.) and their F1 hybrids. - Genetika, Vol 52, No3, 1263-1279. In the process of cabbage breeding and seed production, one of the most important characteristics is the time of flowering. In order to investigate the influence of genotype, season and term of sowing on the flowering process, as well as the genetic control of this trait, an experiment was conducted with three genotypes of cabbage N, B and Scc of different geographical origin and different vegetation length, as well as three new F1 hybrids N x Scc , B x Scc and B x N obtained by hybridization between genotypes. The experiment was conducted during three temperature different seasons S1, S2 and S3 (average cold, cold and warm seasons), in three different sowing terms: August 15 (I), September 1 (II) and September 15 (III). During the winter period favorable for vernalization, two treatments with 300 ppm GA3 were performed. A statistically significant influence of all examined factors: genotype, year, sowing term and gibberellin GA3 treatment, on flowering time was determined. AMMI analysis determined the degree of adaptability of genotypes depending on the growing season,