Meteorological effect on the formation of economic traits of spring wheat in the Central Non-CHernozem region
Authors:   Timirâzevskaâ selʹskohozâjstvennaâ akademiâ, Nadzhodov B.B. 
Published: February 2024

This article presents the results of the study of the meteorological effect of vegetation on the formation of economic traits of spring wheat in 2021–2022. Fifteen varieties, developed in the different ecological conditions, were selected as study material, among them Zlata was used as a standard. The research work was carried out at the Russian State Agrarian University – Moscow Timiryazev Agricultural Academy (evaluation of field trials during vegetation, analysis of yield and its structure) and at the Department of Remote Hybridization of the N.V. Tsitsin’s Botanical Garden of the Russian Academy of Science (laboratory evaluation of grain quality). The crops studied were grown at the Field Experiment Station of the Russian State Agrarian University – Moscow Timiryazev Agricultural Academy. The soil types were sod-podzolic, sandy loam, loamy, structureless. The plot size is 1 m2, three replications, randomized arrangement. Methods of field evaluation according to the methodology of the State Variety Testing as well as generally accepted laboratory evaluations were used. The meteorological conditions during the summer growing season varied greatly in terms of the sum of active temperatures and humidity conditions. The first half of the growing season in 2021 was favorable for wheat plant development. The period from flowering to the grain maturity was characterized by severe drought. In 2022, growing conditions were generally favorable. Simbirtsit (481 g/m2), Obskaya 2 (484 g/m2), Tobol’skaya (512 g/m2), Margarita (603 g/m2), Favorit (505 g/m2), Granni (484 g/m2) were the most productive varieties. The meteorological conditions of the Central Non-Chernozem region in 2021–2022 had an insignificant effect on the yields of most spring wheat varieties due to compensating mechanisms. Only the varieties Margarita, Uchitel’ and Iren’ were found to respond to the additional moisture. The varieties Saratovskaya 74, Simbirtsit, Tyumenskaya 29, Obskaya 2, and Tobol’skaya are characterized by high resistance to local strains of brown rust under natural infection conditions (7 points). The varieties Favorit and Simbirtsit are immune to powdery mildew (9 points). The varieties Simbirtsit, Obskaya 2, Tobol’skaya, Margarita, Favorit and Trizo are highly resistant to septoriosis (7 points). They can be used as source material for breeding spring wheat varieties. The meteorological effect is tracked for tillering productivity, number and weight of grains per ear, weight of 1000 grains and vitreousness. Drought during the grain formation and filling phase reduced the values of all indicators. Grain unit is the most stable indicator of grain physical properties. The earliest ripening varieties are Zlata and Iren’ (the duration of vegetation is 79–81 and 76–79, respectively). The latest ripening varieties are Tobol’skaya, Favorit and Trizo (8, 10 and 16 days after the standard, respectively). High grain content per ear was observed in the varieties Agata, Margarita, Uchitel’, Favorit, Granni (33–39pcs) in the conditions of the Central Non-Chernozem region. The indicator of grain weight per ear can be used as a morphological marker for selection of high-yielding genotypes of spring wheat in the Central Non-Chernozem region.