Response of promising winter wheat varieties on yield to growing conditions

Abstract

Topicality. The genetic potential of winter wheat varieties is used unsatisfactorily, which is one of the many reasons that led to the problem of food grain deficit in Ukraine. Realization of the genetic potential of the variety is possible if the entire set of agrotechnological measures and strict technology of seed growing is implemented. The productivity of varieties with different genotypes largely depends on the preceding crops, sowing dates and weather conditions during the growing season. The purpose of our research was to determine the yield potential of new winter wheat varieties bred at Myronivka, depending on the preceding crops and sowing dates in the conditions of the central Forest-Steppe of Ukraine, as well as to establish the interdependence between them. Materials and Methods. The study was conducted in field experiment in the fields of the V. M. Remeslo Myronivka Institute of Wheat NAAS of Ukraine (MIW) located in the central part of the Forest-Steppe of Ukraine in 2018/19–2020/21 (year - factor A). The object of the research were five new winter wheat varieties bred at the V. M. Remeslo Myronivka Institute of Wheat (MIP Fortuna, MIP Lada, MIP Yuvileina, Avrora Myronivska, MIP Lakomka), which were compared with the standard variety Podolianka (factor B). The experiments were laid down after two preceding crops, namely, sunflower, soybean (factor C); sowing was carried out on September 25 and October 5 with a deviation of 1–3 days (factor D). The coefficients of materiality deviations in air temperature (°С) and the amount of precipitation (mm) was determined by gradation according to the methodology of Ped D. A. (1975) and Kalenska S. V. (2018). Results. Weather conditions during the years of the research varied significantly, which made it possible to evaluate the material objectively. The yield of new winter wheat varieties bred at the V. M. Remeslo Myronivka Institute of Wheat, depending on the preceding crops and sowing dates, was studied. Among the investigated preceding crops, soybean was determined to be the best one, as well as the sowing date September 25, on average, during the years of the study they contributed to obtaining the maximum yield for new varieties of this crop. Conclusions. According to the results of the studying varietal differences, it was determined that the highest yield (6.24 t/ha) in general according to the experiment was formed by the MIP Yuvileina variety for the first sowing date (September 25); for two sowing dates (September 25 and October 5) the highest yield value was observed for the MIP Fortuna variety (5.46 and 5.47 t/ha). Key words: winter wheat, variety, yield, weather conditions, preceding crop, sowing date