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Coordinated and published by The Grassroots Institute, the Grassroots Journal of Natural Resources (GJNR) is an international journal dedicated to the latest advancements in natural resources throughout the world. The goal of this journal is to provide a platform for scientists, social scientists, policy analysts, managers and practitioners (on all academic and professional levels) all over the world to promote, discuss and share various new issues and developments in different arenas of natural resources.
Ruslan Yakymchuk*1, Viktoria Valiuk2, Lidiya Khomenko3, Maxym Tarasiuk4
1Institute of Plant Physiology and Genetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine; National Dendrological Park “Sofiyivka”, National Academy of Sciences of Ukraine, Uman, Ukraine.
Email: peoplenature16@gmail.com | ORCID: https://orcid.org/0000-0002-6249-4304
2Institute of Plant Physiology and Genetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine.
Email: viktoriavalyuk@gmail.com | ORCID: https://orcid.org/0000-0003-2244-5927
3Institute of Plant Physiology and Genetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine.
Email: lidole@ukr.net | ORCID: https://orcid.org/0000-0002-3776-6208
4Institute of Plant Physiology and Genetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine.
Email: Maxym.Tarasiuk@gmail.com | ORCID: https://orcid.org/0000-0001-5914-7208
*Corresponding author
Grassroots Journal of Natural Resources, 9(1): 102-125. Doi: https://doi.org/10.33002/nr2581.6853.090105
Received: 03 February 2026
Reviewed: 31 March 2026
Provisionally Accepted: 05 April 2026
Revised: 09 April 2026
Finally Accepted: 13 April 2026
Published: 29 April 2026
To ensure future generations have access to sufficient quantities of high-quality food, new methods for increasing winter wheat yields are needed. Studying modern genotypes and modeling new varieties based on them is a priority task for breeders. The research aimed to determine the yield of modern high-yielding cultivars and breeding lines of Triticum aestivum L. under different soil and climatic conditions and to assess the influence of individual productivity factors on their formation. In the northern regions of Ukraine's Forest-Steppe and Steppe zones, 16 cultivars and breeding lines of Triticum aestivum var. lutescens, known for their consistently high grain yields in previous years, underwent ecological testing from 2023 to 2025. The dynamics of their yield and the role of yield components in its formation have been studied. In the Forest-Steppe zone, the yield was 9.57–14.63 t/ha, and in the Steppe zone, it was 6.84–10.73 t/ha. The cultivar ‘Gentleman’ and the breeding lines UK 126/20 and UK 070/19 led in terms of yield and demonstrated high ecological plasticity in both study areas. Semi-dwarf short-stemmed cultivars and breeding lines demonstrate the highest yields in the Forest-Steppe zone, while short-stemmed medium-tall cultivars demonstrate the highest yields in the Steppe zone. It has been proven that under different climatic conditions, grain yield directly depends on the grain density of the rarspike and the weight of the grain from the spike and the plant. Despite the important role of the number of productive stems, spike length, and thousand-kernel weight in the yield growth of individual cultivars and breeding lines, selecting breeding genotypes for high productivity based solely on individual traits may be unsuccessful. To achieve high yields in various agro-climatic zones, a comprehensive breeding strategy is essential, integrating high spike and plant productivity into the wheat genotype. This integration is a priority for creating genetic models of next-generation winter wheat cultivars.
Triticum aestivum; Grain yield; Yield components; Correlation dependence; Ecological plasticity
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Yakymchuk, R., Valiuk, V., Khomenko, L. and Tarasiuk, M. (2026). Yield Components and Productivity of Winter Wheat (Triticum aestivum L.) in the Forest-Steppe and Steppe Zones of Ukraine. Grassroots Journal of Natural Resources, 9(1): 101-125. Doi: https://doi.org/10.33002/nr2581.6853.090105
Yakymchuk, R., Valiuk, V., Khomenko, L., & Tarasiuk, M. (2026). Yield Components and Productivity of Winter Wheat (Triticum aestivum L.) in the Forest-Steppe and Steppe Zones of Ukraine. Grassroots Journal of Natural Resources, 9(1), 101-125. https://doi.org/10.33002/nr2581.6853.090105
Yakymchuk R., Valiuk V., Khomenko L., Tarasiuk M. Yield Components and Productivity of Winter Wheat (Triticum aestivum L.) in the Forest-Steppe and Steppe Zones of Ukraine. Grassroots Journal of Natural Resources, 2026, 9 (1), 101-125. https://doi.org/10.33002/nr2581.6853.090105
Yakymchuk, Ruslan, Valiuk, Viktoria, Khomenko, Lidiya, Tarasiuk, Maxym. 2026. “Yield Components and Productivity of Winter Wheat (Triticum aestivum L.) in the Forest-Steppe and Steppe Zones of Ukraine”. Grassroots Journal of Natural Resources, 9 no. 1: 101-125. https://doi.org/10.33002/nr2581.6853.090105
Yakymchuk, Ruslan, Viktoria Valiuk, Lidiya Khomenko and Maxym Tarasiuk. 2026. “Yield Components and Productivity of Winter Wheat (Triticum aestivum L.) in the Forest-Steppe and Steppe Zones of Ukraine”. Grassroots Journal of Natural Resources, 9 (1): 101-125. https://doi.org/10.33002/nr2581.6853.090105
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