Virulence polymorthism of Russian Puccinia triticina isolates

Virulence of P. triticina isolates collected in 9 agroecological regions of Russian Federation and Kazakhstan in 2006–2014 was studied. 62 virulence phenotypes were revealed among tested 179 isolates. The variability for virulence to genes Lr1, Lr2a, Lr2b, Lr2c, Lr3а, Lr3bg, Lr3ka, Lr9, Lr14a, Lr14b, Lr15, Lr16, Lr18, Lr19, Lr20, Lr24, Lr26 and Lr30 was reveal but all isolates were virulent to Lr17 and Lr11. Virulence to gene Lr24 were determined in Krasnodar population; to gene Lr9 in Ural, West Siberian and Central population and to gene Lr19 in these three populations and in additional Volga one. According to UPGMA-dendrogram reliable differences between region collections of isolates have been revealed. The isolates in terms of the degree of similarity were clustered into 4 groups. The first group consisted of isolates from West Siberia, Ural and Kazakhstan. The second group included isolates from Volga, Central and Central Black Earth regions. The third group was presented by North Caucasian isolates and fourth by North Western ones.Исследование выполнено при финансовой поддержке РФФИ (проект 14–04–00464_а)