Yield level and stability in corn hybrids of different ripeness groups

Purpose. To determine the yield and agronomic stability of new corn hybrids bred at Plant Production Institute named after V.Ya. Yuriev NAAS under climatic changes.
 Materials methods. Twenty-eight experimental derived from lines different genetic origins were studied. The field experiments carried out in compliance with conventional techniques.
 Results discussion. Of tested, eight mid-early two mid-ripening distinguished, as their yields higher than those conditional check by 0.42–2.32 t/ha. In addition to yield, harvest moisture grain is an important criterion for evaluating hybrids. all study years, was or below standard. maximum average 2016–2018 produced Vektor (8.13 t/ha), KhA Bolid (8.19 Arho t/a) hybrid UKhL 228 / 408 (7.1 exceeding corresponding 23–24%. When analyzing depending on growing zone, namely Steppe, Forest-Steppe Woodlands, we noted that 5.58, 8.96 7.13 t/ha, respectively. studied, Stavr provided highest 9.49 t/ha 9.59 respectively, 18% Forest-Steppe.
 Conclusions. level ripeness groups evaluated. gave high moderate noticeable stability, providing consistently deteriorating conditions. Based trial results, three hybrids, Liubchyk (FAO 240), 290) 270), included State Register Varieties Suitable Dissemination Ukraine.