Russian Federation
This article presents the results of a comprehensive study of three promising poplar forms: Mendeleev Poplar (Populus alba), Hybrid P.white×Aspen (Populus alba L. × Populus tremula L.), and Bashkir Pyramidal Poplar (Populus bashkirica «Piramidalis»). The aim of this work was to evaluate the phenotypic traits of promising poplar varieties (Mendeleev poplar, the P. white × Aspen hybrid, and the Bashkir pyramidal poplar) to identify valuable breeding material for further use in genetic selection. The study included morphometric measurements of seedling growth parameters and an analysis of the expression of key stress resistance genes (STS, CPK10, P5CS, LEA, PAL, PR10, PR1, DREB) using real-time PCR. Significant interspecific differences in growth characteristics and gene expression profiles were revealed. The Mendeleev poplar demonstrated the highest height (122.3 cm) and trunk diameter (0.95 cm), but relatively low expression of stress-resistance genes. The Bashkir poplar demonstrated complex resistance with high expression of most of the studied genes, but poor growth characteristics. The P.white × Aspen hybrid showed intermediate values for both parameters.
poplar, selection, stress resistance, gene expression, morphometric parameters, Populus alba, Populus alba L.×Populus tremula L, Populus bashkiriana Pyramidalis
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