Screening of promising potato hybrids by drought tolerance indices

Purpose. To evaluate promising potato hybrids for productivity and resistance to drought under water deficit conditions identify genotypes with a high level of adapta­bility abiotic environmental factors. Methods. During 2021–2022, 57 different ripeness groups were studied in the fields breeding crop rotation laboratory Polissia Research Department Institute Potato NAAS Ukraine. Genera­l­ly accepted methods selective statistical analysis used. Results. The research results revealed that dry year, average yield loss all maturity was 15.3 t/ha or 66 % compared indicators wet year. A total percentage drought-resistant moderately distinguished mid-season group. In 16 samples out 54 ones condition sufficient moisture produced highest (in range 24.4–35.9 t/ha). periods, 21 had (7.8–19.2 following showed an advantage over (Ŷ) 8–9 evaluated tolerance indices: ‘P.15.56-10’, ‘P.17.21/43’, P.19.53/6’, ‘P.17.30-3’, ‘P.17.1-4’, ‘P.18.51/3’, ‘P.17.19-21’, ‘P.17.18/9’, ‘P.17.4/13’ ‘P.17.43/1’, P.17.44-1’, ‘P.17.38/16’, ‘P.17.8-28’, ‘P.17.13/7’ ‘P.17.38-56’. Conclusions. According research, response stress identified. Thus, 5 formed optimal resistant drought; flexi­b­le hybrids; 8 demanding supply during process formation. sources ones. An positive correlation (r = 0.528) between yields diffe­rent established.