The analysis of the virulence of Puccinia triticina en-tries collected in Omsk Region in 2017 was performed. The genes Lr19, Lr24, Lr28, Lr29, Lr41, Lr42, Lr45, Lr47, Lr51, Lr53 and Lr65 are characterized by high efficiency. The variation in the frequencies of virulence was observed on the lines TcLr2a, TcLr9, TcLrll, TcLr15, TcLr16, TcLr20 and TcLr26. In general, there were significant changes in Omsk population in 2013-2017. Basically, significant changes in Omsk population in 2013-2017 affected the frequency of occurrence of clones virulent to wheat lines with resistance genes Lr9 (10-33 %), Lr20 (37-100 %) and Lr26 (0-69 %). 61 studied monopustuline isolates were represented by 12 phenotypes (races). Among them, three THTTR (avirulence / virulence: TcLr9, 19, 24 / 1, 2a, 2b, 2c, 3a, 3bg, 3ka, 11, 14a, 14b, 15, 16, 17, 18, 20, 26, 30), TGTTR (TcLr9, 19, 24, 26 / 1, 2a, 2b, 2c, 3a, 3bg, 3ka, 11,14a, 14b, 15, 16, 17, 18, 20, 30) and TQTTR (TcLr19, 24, 26 / 1, 2a, 2b, 2c, 3a, 3bg, 3ka, 9, 11, 14a, 14b, 15, 16, 17, 18, 20, 30) had the largest representa-tion in Omsk population in 2013-2017. The resem-blance between the samples of Omsk population in 2015 and 2016 was higher than in 2013 and 2014. Phe-notypes TGTTR and TQTTR were common throughout the years of research. There were no changes in pheno-typic composition of the pathogen in the variety of Pavlogradka. Insignificant changes in the varieties Pamyati Azieva, Duet and Chernyava 13 and more sig-nificant on OmSAU 90 were observed.
Puccinia triticina, leaf rust, virulence, bread wheat, viru-lence, Lr-genes, Puccinia triticina
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