Enlargement of genetic diversity of spring bread wheat resistance to leaf rust (Puccinia triticina Eriks.) in Lower Volga region

Leaf rust ( Puccinia triticina Eriks.) is the significant disease of winter and spring wheat in Russia. In the Volga region, the epiphytoties of this disease are observed on average once per three to four years. The genetic protection of wheat from leaf rust is a priority. Its successful practical implementation is possible only by the increasing of the genetic diversity of the commercial wheat cultivars, particularly by effective combinations of the known genes for resistance or use in the hybridization donors of new Lr -genes, from species of genera Triticum and Aegilops . On the basis of highly productive and adaptive spring bread wheat cultivars (Prokhorovka, Saratovskaya 29, Saratovskaya 55, Saratovskaya 68, Saratovskaya 70, Saratovskaya 73, Saratovskaya 74, L503, L505, Dobrynya, Favorite, Belyanka, Voevoda of Saratov Breeding Center) and alien species the introgression lines are derived which possess high resistance to leaf rust and are promising as breeding material...