DOI 10.36461/NP.2024.70.2.012
UDC 633.351:631.522/.524

COMPREHENSIVE ASSESSMENT OF DROUGHT TOLERANCE OF LENTIL SAMPLE VARIETIES UNDER THE CONDITIONS OF THE LOWER VOLGA REGION
G.A. Maslova, Candidate of Agricultural Sciences, Junior Research Associate;
T.V. Larina, Research Assistant;
S.A. Guseva, Senior Research Associate;
O.S. Nosko, Junior Research Associate
Federal State Budgetary Scientific Institution "Russian Research and Design Technological Institute of Sorghum and Corn", Saratov, Russia,
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The article presents the results of the variability of seed yield and the damage degree to the cell membranes of plants of lentil sample varieties and identifies promising samples for further work on the selection of varieties characterized by drought tolerance. Samples of small-seeded and large-seeded lentils were selected as research objects. The experiment was carried out in 2021-2023 at the experimental field of the Institute of the Federal State Budgetary Scientific Institution "Rossorgo". The hydrothermal coefficient for the period from sowing to flowering in 2021 and 2023 was 0.86, and in 2022 – 0.84. The average variability of seed yield in the large-seeded samples was 15.12 % and ranged from 0.74 to 1.00 t/ha, while in the small-seeded samples a significant variability (24.65 %) was observed, ranging from 0.56 to 1.20 t/ha. For the experiment, several promising samples were selected for the investigated feature: k-2850 and k-3061 (large-seeded lentil), k-1978, k-2872 and k-2365 (small-seeded lentil). Conductometric measurements of electrolyte yield from the plant leaves were performed during the flowering stage of the lentils to further compare the results of the selected drought-tolerant samples in terms of seed yield. The environmental factor significantly affected the damage degree to the cell membranes of lentil leaves in the three-year studies. In different years, the damage was 9.74 % in 2021, 12.15 % in 2022 and 8.58 % in 2023. The small-seeded lentil samples k-1894, k-2839 and k-2872 as well as the large-seeded lentil sample k-2850 were identified by a low electrolyte yield from the plant tissue and thus by a high tolerance. According to the complex evaluation in the study of lentil varieties in the conditions of the Lower Volga region, the most drought-tolerant variety in the experiment was the small-seeded lentil k-2872 (the seed yield was 1.20 t/ha). The data obtained are confirmed by the low values of the damage degree to the cell membranes of plant leaves (6.95%). Among the large-seeded lentil samples, it was k-2850 (the seed yield at 1.00 t/ha and the damage degree of 6.10%).
Keywords: variety sample, lentil, membrane permeability, damage degree, drought tolerance, yield.

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