Evaluation of winter rye Sibir' 5 variety

The objective of the study is to evaluate the new variety of tetraploid winter rye Sibir' 5 in terms of yield and grain quality, and elements of crop structure. The experiments were conducted in 2021-2023 in the fields of the Omsk Agricultural Research Center. The object of research was tetraploid rye varieties from competitive variety testing of the winter crop selection laboratory. Sibir' 5 variety was obtained by individual-family selection from a combination of crossing Yubileynaya 25 / Tetra korotkaya. The growing season of the new variety is 327 days. Winter hardiness of Sibir' 5 variety is at the level of the standard Sibir variety (95 versus 96 %). The new variety is resistant to shattering (5 points) and lodging (4.4 points). Sibir' 5 variety is more productive than Sibir' and Sibir' 4 winter rye varieties previously created in the laboratory. The excess in grain yield amounted to 0.43 to 0.49 t/ha. The new variety is less tall. Sibir' 5 variety is distinguished by better expression of productive tillering, grain content and ear grain weight. Among the grain quality indicators, the new variety is characterized by a high falling number (171 s). Among the elements of the yield structure, it has an average level of variation in the ear grain content (17.1 %). This trait in all rye varieties is most closely associated with the ear grain weight (r = 0.854-0.897), and therefore selection by it will be more effective than by the weight of 1000 grains (r = 0.582-0.686). Sibir' 5 variety has been submitted for State Variety Testing in 2023 and is recommended for use in the Ural, West Siberian and East Siberian Regions.