Eight cultivars of winter wheat were evaluated in post-registration trials in Lower Silesia. The trials were conducted at six sites (Jelcz-Laskowice, Kro cina, Kobierzyce, Tarnów,
Tomaszów Bolesławiecki, Zybiszów). The recently registered cultivars: Kobra, Jawa, Mewa, Sakwa, Kris, Soraja, Zyta, Korweta, were grown at two variants of cultivation: standard and intensive. The intensive variant, in comparison with the standard one, differed by a 40kg/ha higher level of nitrogen fertilisation, application of anti-lodging chemicals, foliar feeding of plants with microelements and complete control of fungal diseases. Statistical analysis was carried out according to computer program Sergen 3. In both the intensive and standard variants, the cultivars Kobra, Jawa, Soraja and Kris showed higher yields than the remaining ones. The high stability of Jawa in the standard and Kobra in the intensive variant indicates that this genotype should be recommended for cultivation in Lower Silesia.
The intensive variant promotes high yields in the cultivars, particularly on soils of very good and good wheat complexes. Considerable differences in yields in some of the localities suggest the need of testing new varieties in many environments, because of the significant genotype x environment interaction.