Оценка экологической стабильности и пластичности сортов редьки масличной разного эколого-географического происхождения в условиях лесостепи правобережной Украины

Abstract

he article presents the results of the assessment of 14 varieties of oilseed radish of different ecological and geographical origin. All experimental variants were established using wide-row sowing (30 cm between rows) with a seeding rate of 2.0 million pcs/ha of germinating seeds on the background of N30P30K30 fertilizers. In the course of research in the period 2013-2019 we studied the integrated basic and related indicators of varietal plasticity and stability based on a systematic technique. Additionally, the genotypes were evaluated for the indicators of drought tolerance index, genetic flexibility, stress tolerance, agronomic value, breeding value, and others. Based on this comprehensive assessment, the varieties were ranked in types according to their pasticity and stabi lity and in classes according to the technological requirements regarding the possibility of obtaining certain levels of seed yield. The studied varieties are characterized by a rather wide spectrum of plasticity and a rather narrow spectrum of stability. The same is confirmed by the evaluation of the varieties accorging to ecological variation of yield: all varieties belong to the medium range (from 11,15% for Fakel variety to 17,71% for Iveya varierty. Based on the complex rank criterion, the varieties of oilseed radish were identified that correspond to significantly higher adaptability and plasticity genotypes – ‘Sabina’, ‘Prigazhunya’, ‘Nika’, ‘Ivea’ with seed productivity of up to 2.0 t/ha with a high reserve of its growth due to their high genetic flexibility and breeding values.

Keywords

• oilseed radish
• varieties
• plasticity
• stability
• crop yield