Determination of drought resistance of soybean breeding material

The purpose and objectives of the study. To determine resistance soybean genotypes to drought according indices based on analysis yield in years contrasting terms hydrometeorological conditions.
 Materials research methods. material for determining influence year conditions level average soybeans were varieties breeding numbers competitive variety test (CVT). Experiments carried out four repetitions with a plot area 25 m2. Drought intensity (D) was determined by formula proposed Fischer R.A. Maurer R. Differentiation CVT 2016 2018 susceptibility (DSI), tolerance (TOL), (MP), stability (YSI), (YI), stress (STI), geometric mean (GMP). Processing results B.O. Dospehov [27] using STATISTICA 10 Excel programs.
 discussion results. During period (2008–2021), highest obtained – 2.57 t/ha, lowest 0.50 t/ha. A comparison showed that loss due 2.07 or 81%. At minimum yield, losses equal 1.78 84.8%. maximum 2.19 t/ha 75.5%, respectively. Therefore, difference greater than difference. dry 0.81.
 According indicators, number calculated analyzed, which characterize samples drought. value index (DSI) ranged from 0.87 1.09, an 1.00. (TOL) 1.61–2.41 2.11. (MP) range 2.34–3.15 had 2.85 (YSI) varied 0.12 0.30 0.19. under (YI) 64.6–143.3%, 98.9%. 64.6% 143.3%, (or proportional mean) (GMP) studied 0.92 1.38 median 1.11 t/ha.
 each index, researched differentiated drought-resistant selected.
 Conclusions. most indices: crop productivity (STI) 23-18 (3836 / 76-130 selection). five 16-18 (Volgohradka Mriya) stood out. Number 49-18 (Kharkivska 56 Ilsoy) indicators (MR), three indices, it is identified as 22-18 (selection №14) (YSI); 36-18 zernokormova Yug 30) 24-18 62 Hodson) Selection 28-18 (4305-04) (MR). 29-18 (Narrow-leaved mutant 82-205) Numbers 50-18 Pasteter Schwarus) 37-18 (Success Dream) distinguished (YSI). 20-18 35 Kyivska 27) Podyaka Roksolana (TOL). Selected high abiotic are recommended use resistance.