Insufficient sowing areas of durum spring wheat both in the Forest-Steppe zone and in Ukraine as a whole are due to a number of negative phenomena accompanying its cultivation. In particular, they include lodging crops of cereals. The perennial data obtained as a result of analyzing collection accessions of durum spring wheat (Triticum durum Desf.) as genetic sources of this practically valuable trait associated with lodging resistance of crops are discussed. The collection accessions were divided by height into three groups, among which 45.5 % were short height plants and dwarfs. The influence of weather conditions on plant height and lodging resistance for 11 years was analyzed and shown. Correlations between lodging resistance and features of stem morphology which must be taken into account in breeding and genetic studies have been determined. Thus, the data obtained for medium height accessions indicate the moderate relationship (r = 0.32±0.09) between lodging resistance and yield as well as medium relationship (r = 0.61±0.10) between lodging resistance and the length of the second upper internode in representatives of this group. A list of durum spring wheat accessions with lodging resistant and high productivity is presented, they are recommended as initial material for use in breeding programs. There are identified medium height and lodging resistance sources Chado, Zolotko, Leukurum 10-07, Bezenchukskaya 182, Boshak, Kustanayskaya 30 et al., short height ones Nashchadok, Altayskiy prostor, Altyn-shigys and dwarf sources 28 THIDSN-2-5-8, Adamar 7, Neodur, Olga, Multidur, Belladur, et al. that combine this trait with high level of productivity. The analysis and involving sources of short height in crosses allowed the creation of short stem lodging resistant durum spring wheat variety MIP Raiduzhna which in 2017 was included into the State Register of Plant Varieties Suitable for Dissemination in Ukraine in the Steppe and Forest-Steppe zones, as well as short height variety Diana (in the Register since 2015) for the Forest-Steppe zone.
Keywords: Triticum durum Desf., collection accessions, lodging resistance, plant height, hydrothermal coefficient, correlation, productivity
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