The HMW glutenin subunits (SDS-PAGE) and gliadin subunits (A-PAGE) were analysed in selected triticale hybrids and their parental forms. In order to enable further selection of new high-quality hybrid strains of winter triticale determinations were also carried out for protein content, falling number and soluble pentosans level. Among the identified glutenin subunits coded by loci Glu A1 both in the parental forms and in hybrids the qualitatively advantageous subunit 2* usually occurred. Glutenin subunits coded by Glu-B1: 7+25, 7+8, 6+8 for hybrids strains: IGS 5101 x LAD 122, FDT 975 x LAD 122 and Alzo x F 8063 were consistent with maternal forms. In the Alzo x F 8063 strains the additional subunits not detected in parental forms were identified as well. Electrophoretic analysis of gliadin proteins showed intralinear polymorphism of these proteins. The studies pointed to parental genotypes as the most valuable ones because of the quality of grain of hybrids: the maternal FDT 975 and paternal LAD 122. The hybrid strain FDT 975 x LAD 122 was characterised by presence of qualitatively good glutenin subunits, the highest falling number, and a higher content of soluble pentosans in the grain.