Assessment of adaptability and stress resistance to drought of promising lines of spring durum wheat

A comparative comprehensive assessment of varieties and promising lines of spring durum wheat in terms of adaptability, stability of yield formation, resistance to drought and stress was carried out. For this purpose, the methods for determining ecological plasticity according to S.A. Eberhart, W.A. Russel, the AMMI method for determining the interaction of the genotype environment based on the effects of additive and multiplicative interactions according to R.W. Zobel et al., and J.M. Mondo et al. were used. To establish the degree of drought resistance and stress resistance, 11 indicators (indices) were used: TOL (Endurance Index); SI (Yield Stability Index); DI (Drought Tolerance Index); STI (Stress Tolerance Index); DSI (Fisher and Maurer Drought Tolerance Index); DSI* (Modified Fisher and Maurer Drought Tolerance Index); GMP (Geometric Productivity Index); HM (Mean Harmonic); RDI (Relative Drought Index); ATI (Abiotic Tolerance Index); SDI (Drought Sensitivity Index). According to the AMMI method, the yield-stable genotypes are Gordeiforme 11-98-3, Gordeiforme 12-169, Gordeiforme 12-17-2, Gordeiforme 13-37-2, adaptive genotypes Gordeiforme 12-17-2, Gordeiforme 13-37-2, Gordeiforme 14-83-1, Jemthujina Siberia and Omskаya jantarnaya. Calculation according to the method of S.A. Eberhart, W.A. Russell differentiated the varieties into 3 groups: 1stable genotypes that respond well to growing conditions: Gordeiform 12-16-9 and Omskaya Amber; 2 – highly stable, increasing yields in proportion to improving environmental conditions: Gordeiform 12-17-2, Gordeiform 13-37-2, Fortuna 24; 3 – extensive: Gordeiform 14-83-1, Omsk topaz. The stress and drought resistance indices TOL, SI, HM, DI, STI, DSI, DSI* GMP, SDI distinguish two samples: Gordeiforme12-17-2 and Omskaya jantarnaya. According to the relative drought index (RDI), Gordeiforme12-17-2, Gordeiforme14-83-1 and Jemthujina Sibiri stand out, and according to the abiotic tolerance index (ATI), Gordeiforme14-83-1 and Jemthujina Siberia. Revealed the most stress-resistant and stable genotypes: Gordeiforme 12-17-2, Gordeiforme 14-83-1 and Omskaya jantarnaya.