Abstract. The article presents the data of the analysis of variations in the most important parameters of suitability for mechanized harvesting in collection accessions of lentils brought from different landscape-geographic regions. The aim of the study is to investigate the phenotypic features of suitability for mechanized harvesting of lentil accessions, identify sources, and create source material for crop selection in Western Siberia. Methods. The research work was carried out in the field and laboratory conditions of the southern forest-steppe of the Omsk region for three years (2022–2024). During the growing season in the years of research, a lack of moisture supply was noted in the region, which led to an arid climate (HTC = 0.83…1.21). The experimental site is located on meadow-chernozem medium-deep low-humus medium loamy lumpy soil with a neutral reaction of the environment (pH = 6.5). Results. In large-seeded lentils, root lodging of plants was predominant (65–73 %), while in small-seeded lentils, bush collapse (66–71 %). High resistance of agrocenoses to lodging was noted in 2023 (92.5–96.3 %). The collection samples are conventionally divided into two types: with high lodging resistance (60.1–89.7 %) and low (39.9–57.8 %). The degree of lodging resistance is strongly influenced by the genotype of the variety and growing conditions (53.4 %). Samples highly resistant to lodging were characterized by low physical stress on the stem (101.4–103.3 mg/cm), higher stem length (38.5–45.2 cm) and lower bean attachment height (17.6–21.8 cm), and low yield (1.2–1.4 t/ha). The weakly lodging samples were characterized by the following area: cross-section – 5.22 mm2, xylem – 2.15 mm2, lignified elements – 2.31 mm2, sclerenchyma strands – 33.21 μm2, the number of sclerenchyma strands – 11.23 pcs. Scientific novelty. The conducted research work allowed us to select promising lentil samples for their further use as sources of high technology in the creation of new regionally adapted highly productive varieties of the crop.
lentils, suitability for mechanical harvesting, lodging resistance, plant height, lower bean attachment height, yield
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