Abstract
Resistant to lodging, large-seeded mid-early maturing soybean cultivar Rys’ was obtained as a result of individual selection in F4 from the hybrid combination Slavia × Shama SRP on differentiating back-grounds based on the characteristics of semi-determinant stem growth, large seeds, reduced response to day length, cold and frost resistance. Based on the results of variety testing 2019–2022, the soybean cultivar Rys’ exceeded the standard cultivar Vilana by 0.54 t/ha by yield. The height of plants at the latitude of Krasnodar (45°) is 90–109 cm. In optimal moisture conditions, the weight of 1000 seeds of this cultivar is 165–207 g. The new high-yielding soybean cultivar Rys’ is highly resistant to low air and soil temperatures, and also reacts poorly to nonoptimal day lengths. This allows it to be cultivated in soybean-producing farms in the North Caucasus and Lower Volga regions of the Russian Federation, as well as in the republics of Central Asia and Transcaucasia at latitudes from 40 to 50°.
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