
The results of evaluating the breeding value of winter wheat varieties based on productive tillering during 2021–2023 are presented. Twelve varieties belonging to three ecotypes — forest-steppe, steppe, and Western European — were studied. Mean trait values (x̄), variation limits (min–max), and breeding value (Sc) were determined. The highest productive tillering indices (2.0) were recorded in the varieties Zorepad Bilotserkivskyi and Fidelius. In terms of breeding value (Sc), the most promising variety identified was Znakhidka Odeska (Sc = 1.8). The findings of the study allow for the identification of the most stable and productive genotypes for further application in breeding programs aimed at developing new high-yielding winter wheat material. Breeding value (Sc) was calculated according to V. V. Khangildyn and M. A. Lytvynenko (1981): Sc = X × (Xlim / Xopt), where: Sc – breeding value; X – the mean value of the studied trait; Xlim – the minimum value of the trait; Xopt – the maximum value of the trait.
