Evaluation of grain yield performance and its stability in various spring barley accessions under condition of different agroclimatic zones of Ukraine

Two extremely urgent problems of biological and agronomic research nowadays are ensuring an optimal balance between usage natural resources to meet rapidly growing needs for food production preservation biodiversity. It is also important extend the genetic diversity main crop varieties in agroecosystems. At same time, modern should be characterized by a combination high yield preserving stability under variable conditions. Solving outlined tasks requires comprehensive involvement breeding process genetical concentrated genebanks world. Barley (Hordeum vulgare L.) one most crops that satisfy various humanity. In respect this, 2020–2022, multi-environment trial was conducted three agroclimatic zones Ukraine (Forest-Steppe, Polissia, Northern Steppe). We studied 44 spring barley collection accessions different ecological geographical origin, subspecies groups botanical which were obtained from National Center Plant Genetic Resources Ukraine. Statistical indices (Hom, Sc) graphical models (GGE biplot, AMMI) used interpret performance its stability. Both individual sites years combinations trials productivity, discriminating power representativeness. The environments differed quite strongly among themselves terms these indicators. established genotypes higher adaptability environmental conditions (stability years), compared all (wide adaptation). A strong cross-over genotype environment interaction found accessions. Nevertheless, both with very only zone (Amil (UKR), Gateway (CAN)) or two niches relatively wide (Stymul Ly-1064 Rannij (KAZ), Shedevr Arthur (CZE)) identified. There did not show maximum sites, but had (Ly-1059 Ly-1120 Diantus Danielle (CZE)). general, naked inferior covered ones potential adaptability, at some them (CDC ExPlus (CAN), CDC Gainer Roseland (CAN)), accordingly statistical indicators, increased certain sites. Among better according analysis accession McGwire parameters (CAN) than standard. peculiarities manifestation variability revealed this study will contribute complementation deepening existing data interaction. Our results can further studies developing variety specific adaptation disitnguished origin affiliation recommended creating new material aim simultaneously increasing stability, as well widening basis varieties.