The aim of this study was to evaluate the salinity tolerance of rice seeds at the germination stage under laboratory conditions and to identify promising initial material for further breeding work. A total of 21 rice accessions were evaluated under exposure to a 1.5% NaCl solution. The number of germinated seedlings, shoot length, root length, number of roots, plant biomass, and root biomass were determined as indicators of early growth and development. The results demonstrated differences among the studied accessions in germination and initial growth responses under salt stress. The highest numbers of germinated seedlings were recorded in D-111 (99 seedlings), D-66 (98), D-35 (95), D-12 (93), and D-29 (92). The D-111 accession also showed relatively high shoot length (4.54 cm) and root number (4 roots). However, a high germination rate in some accessions was not always accompanied by intensive biomass accumulation and root development. This finding indicates that the assessment of rice tolerance to salinity should consider not only germination capacity but also a combination of morphological characteristics associated with early seedling development. The obtained results demonstrate the potential of laboratory screening for the selection of promising rice germplasm with improved salinity tolerance and its subsequent use in breeding programs aimed at developing varieties adapted to saline environments.
Laboratory Assessment of Rice Varietal Samples for Tolerance To 1.5% NaCl Solution at The Seed Germination Stage
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References
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