Abstract
Resistance to foliar diseases has been studied in 14 promising lines of soft spring wheat developed at the Chelyabinsk Research Institute of Agriculture (CRIA) using donors carrying alien genetic material. Resistance to such diseases as the leaf and stem rust, leaf blotch, and tan spot was assessed in 2019 at the CRIA infection nursery starting from the first manifestations of disease symptoms. Additionally, the juvenile resistance of these lines has been studied at the seedling stage under laboratory conditions. Leaf (Lr) and stem (Sr) rust resistance genes have been identified using molecular markers. Under field conditions, a high level of group resistance to rust and blotch diseases has been observed in the Erythrospermum (Er.) 26620, Lutescens (Lut.) 26708, Ferrugineum (Ferr.) 26768, and Er. 26762 lines. The Lut. 26708 and Ferr. 26768 lines also demonstrate resistance at the seedling stage. The majority (79%) of the studied lines are resistant to leaf and stem rust at both juvenile and adult stages. Molecular marker analysis has revealed these lines carry highly efficient LrSp and Lr24/Sr24 genes occurring either separately or together with low-efficient Lr1, Lr3, and Lr10 genes; the lines are also characterized by effective combinations of Lr9 + Lr26/Sr31 and Lr21 + Lr34/Sr57 genes. The studied wheat lines have a complex of valuable traits, such as lodging resistance, high grain quality, and high yield. Based on the totality of valuable traits and a group resistance to pathogens, the Fer. 26768 line carrying the Lr34/Sr57 + Lr21 + Lr10 gene combination, which has not been previously used for the wheat breeding in Russia, has been selected for use in breeding programs.
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The study was financially supported by the Russian Foundation for Basic Research (project no. 19-016-00052а).
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Gultyaeva, E.I., Tyunin, V.A., Shreyder, E.R. et al. Breeding of Soft Spring Wheat for Resistance to Foliar Diseases Under Southern Ural Conditions. Russ. Agricult. Sci. 47, 106–112 (2021). https://doi.org/10.3103/S1068367421020075
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DOI: https://doi.org/10.3103/S1068367421020075