The tuber productivity of a variety is genetically determined by a number of characters and is adjusted by the impact of environmental factors. As a result of a comprehensive agroecological assessment of the collection of domestic and foreign potato varieties in contrasting agrometeorological conditions in 2014–2022, the variability of the value of the tuber productivity trait, which characterized separately isolated genotypes according to the phenotypic value of the trait, was studied with the imposition of additional ecological variation. The purpose of the research is to identify the sources of increased potato tuber productivity in a comparative assessment of the studied assortment of domestic and foreign selection in the conditions of the Middle Priamurye. The results of the field experiment were obtained and their statistical processing was carried out. A variational analysis of the data was carried out. The sample volumes for each sample are given, the range of tuber productivity variation is established. The indices ofтvariance, standard deviation, error of the sample mean, coefficients of variation and evenness of the studied quantitative trait, which by phenotypic value characterized the response of each studied genotype to specific environmental factors, were determined and analyzed. As genetic sources of increased tuber productivity from the Russian assortment of potatoes with a slight variability of the trait and the value of the evenness coefficient, which is 83.1–95.1 %, the following varieties were selected (t/ha): Lyubava (29.6); Kholmogorsky (28.6); Saprykinsky (27.4); Geyser (26.9); Krepysh (26.2); Vasily (26.1) and Krasavitsa Bryanshchiny (25.6). From foreign varieties, samples with medium and significant variability of the trait (75.1–87.1 %) can be considered (t/ha): Red Lady (29.2); Rocco (28.0); Odyssey (27.1); Latena (27.7); Adretta (26.2) and Lugovskoy (26.2). With an average productivity of the Russian varieties over the years of study amounting to 25.8 t/ha, there was established their benefit over foreign varieties with a yield of 23.6 t/ha.

Rafalskiy Sergey V., Rafalskaya Olga M.

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