Search for the parent material of spring soft wheat resistant to septoria tritici blotch and analysis of the trait inheritance

In 2017-2020 in the conditions of Kirov region there were studied 143 varieties, 115 perspective lines and 28 hybrids first generation spring soft wheat according to degree resistance septoria tritici blotch against background natural development infection. It has been established that disease significantly increased with a decrease air temperature during «seedling-tillering» phase (r = -0.83…-0.96) an increase amount precipitation «shooting» +0.87…+0.90). Resistance was shown by 16.1 % collection samples. A significant -0.83) yield average 19 susceptible samples compared resistant ones revealed. The greatest breeding immunological value represented varieties Russian selection: Tobolskaya, Tyumenskaya 29, Moskovskaya 35 МIS, among which early variety MIS tolerant blotch. Thirteen identified from new material. selected for used hybridization. F 1 domination overdomination inheritance prevailed, as well weight 1000 grains per m 2 . Among them, 8 highest values dominance indices identified. established, blotch, occurs both maternal paternal lines. effect obtained when using Daria (Russia) Epos (Germany). most productive Daria, taken form, Egisar 29 form.