An early cold- and drought-resistant soybean variety Triada

Abstract

The early maturing soybean cultivar Triada was developed as a result of individual selection in F4 from the hybrid combination Belogorskaya × Vilana on differentiating backgrounds for traits of reduced response to day length, cold and frost resistance, drought tolerance. Additionally, the degree of cold resistance of the initial germplasm for the breeding from a cultivar Iney was evaluated by a cryosedimentation method. According to the results of the variety trials of 2019–2020, the cultivar Triada in terms of yield exceeded the standard cultivar Slavia by 0.62 t/ha. The height of plants at the latitude of Krasnodar (45°) is 95–125 cm. The new high-yielding soybean cultivar Triada is highly resistant to low air and soil temperatures, and reacts weakly to nonoptimal day lengths. This allows it to be cultivated as a main crop in the Northern Caucasian, Central Chernozem and Low Volga regions of the Russian Federation, as well as in the Republics of Kazakhstan, Uzbekistan and Kyrgyzstan at geographic latitudes from 40 to 50°.