The aim of this study, performed in the years of 2002-20012, was to derive male sterile lines in winter triticale. The study confirmed previous findings, that a very limited genetic pool for maintenance of male sterility in CMS-Triticum timopheevi is available in genotypes of triticale. Among 1250 tested pollen parents, only 86 (6.9%) acted as complete maintainers, while 334 (26.7%) maintained male sterility partially. On the basis of male sterile plants selected out of complete and segregating progeny, 463 completely male sterile BC2 lines and sub-lines were produced. 830, (66.4%), pollen parents restored completely or partially pollen fertility of F1 hybrids.