The influence of particular chromosome regions of Triticum timopheevii on the formation of resistance to diseases and quantitative traits in common wheat

Evaluation of the influence of Triticum timopheevii Zhuk. introgression fragments (2 n = 28, A t A t GG) and their combinations on resistance to leaf and stem rust, powdery mildew, and a number of quantitative traits in 15 introgressive lines of common wheat was conducted. Analysis of introgressive lines by molecular genetic and cytological methods showed the efficiency of using a complex of different types of markers for detailed characterization of hybrid forms and detection of different translocations and substitutions. Evaluation of lines according to their resistance to fungal diseases showed that lines that contain an introgressive fragment of the 5G chromosome in their genome are completely resistant to populations of leaf rust in Western Siberia and the stem rust that is typical for Omsk oblast. Lines 3862-5 and 3862-15, which contain a fragment of the long arm of the 2G chromosome in their genome, were resistant to the population of stem rust in Western Siberia. Introgressive lines were studied for a number of quantitative traits. No negative influence of alien material on the yield and other quantitative traits was observed in all studied lines, which allows one to use them in breeding as donors of resistance to fungal diseases. In addition, the positive influence of T. timopheevii 2G chromosome fragments on the number of grains in an ear was determined.