Abstract
A collection of soft winter wheat specimens investigated on the artificial infectious background of the leaf rust pathogen and selected resistance among them. The genetics of resistance sign in varieties and specimens were determined by hybridological analysis of F2: Lovrin 32, KM 1485-6-8, VR 89 Bo 22, Beres, Tobarzo, 0-74-8-2, MIKM 1851-80, 4347-4, NS 326-99, 5517 A-5-5 Yr, Florida 302, VR 87 Bo 15, Matyo, NS 1308, 200-830, Polka, NS 2630/1, NS 18-30, HBE 0140-119, HBE 208-120, HBE 0303 156, HBE 0425-156, Tx91v4511, Tx92v4511, Plyska, Zernogradskaya 31, Volshebnitsa, Myronivska 40, Myronivska ostysta, Myronivska 28, Estet, Volynska napivintensivna, Kyivska 8, Expromt, Mironivska 29, Remeslivna, Garant, Selyanka, Erythrospermum 15761, Erythrospermum 12557, Erythrospermum 12735, Vympel odeskyiy during 1990–2018. The gene non-identity of the investigated donors was determined. In a variety of VR 89 Bo 22, 2 resistance genes, one of them Lr19, was investigated. The results of investigations of the composition of the leaf rust pathogen population by a series of isogenic lines and varieties of carriers of known effective resistance genes are presented. The high resistance against the leaf rust pathogen in the forest-steppe of Ukraine provide the genes Lr9, Lr19, Lr37, Lr42 + Lr24, Lr43 (Lr21 + Lr39) + Lr24, Lr9 + Lr26, Lr10 + Lr24.
Highlights
Soft wheat is the leading grain crop by value in the world (El-Khoury, 2009)
The Caucasus is the center of origin of many endemic, rust-resistant forms, and should occupy the first place in the globe in terms of the abundance of genetic and physiological types of wheat pointed (Khaneghah et al, 2018)
The Triticum timopheevii with complex resistance against all types of rust, powdery mildew, and soot was found in the Caucasus
Summary
Soft wheat is the leading grain crop by value in the world (El-Khoury, 2009). The yield potential of this crop is not fully realized due to the damage to crops by phytopathogens. The scientific hypothesis is founded on identifying nature inheritance and manifest resistance genes to exciter of leaf rust. It is attaining by investigation of composition population exciter of disease and identifies resistance genes at collectible samples soft wheat. It is making it possible to increase the resistance gene pool and creating new heterogeneous varieties of soft wheat. To identify resistance genes and the nature of the inheritance of the trait of resistance to the agent of leaf rust, using the method of hybridological analysis (Radchenko and Odintsova, 2008). Samples were crossed with each other according to an incomplete diallel scheme to determine the allelic ratio of genes
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