FEATURE VARIETIES AND LINES WHEAT FARM AREA SOUTH URAL, ON RESISTANCE TO PATHOGENS BROWN RUST

A.P. Glinushkin¹, E.I. Gultyaeva^2
1Orenburg State Agrarian University
²VIZR of the Russian Academy of Agricultural Sciences

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Summary. Puccinia triticina Erikss. – оne of the major diseases of wheat in the conditions of the Southern Urals currently a priority in protection belongs genetic protection. The study of the field of juvenile and sustainability of wheat grown in the Orenburg region, with the identification of 11 genes (Lr1, Lr3a, Lr9, Lr10, Lr19, Lr20, Lr21, Lr24, Lr26, Lr37, Lr41). By assessing the sustainability field revealed that a high level of resistance to P. triticina had cultivars Altayskaya 110, Orenburg 105 and promising breeding lines Lyutestens 1895 and Eritrosperum 695. Characterized by a moderate level of susceptibility Kolos Orenburg and Eritrosperum 685. Pioneer 32 greatly amazed P. triticina (susceptible group). Laboratory evaluation revealed a juvenile stability for all samples susceptible cultivar reaction spectrum fungal isolates , except for grade Altayskaya 110, which was susceptible only to virulent isolates of the fungus on the line with a gene Lr9, and is resistant to all others. As a result, molecular screening revealed the absence of effective and partially effective genes Lr19, Lr24, Lr41, inefficient genes Lr1, Lr20, Lr26 and adult stability genes Lr21, Lr37. Established the presence of genes Lr9, Lr3a , Lr10 in Altayskaya 110 gene Lr3a in and Kolos Orenburg Lyutestens 1895 and gene Lr34 age stability in Eritrosperum 695 and Eritrosperum 685. Probably the presence of the gene Lr34 age stability at Eritrosperum 695 and Eritrosperum 685, and causes a lower level of their defeat in the field. In Kolas Orenburg and Lyutestens 1895 moderate susceptibility to P. triticina likely caused by the presence of their additional Lr- genes as gene Lr3a lost its effectiveness. The study confirmed the low genetic potential protection against P. triticina.

Keywords: wheat, Puccinia triticina, leaf rust, Lr-genes, molecular markers.