Comparative assessment of potato varieties in West Siberia forest-steppe

Data collected during experimental research conducted in 2024-2025 in the ecological-geographical trials of modern potato varieties grown using a technology for the production of high quality seed material are presented. Research was held on trial fields of ZAO ShP «Michurinets» in Novosibirsk region. Soil at the trial fields was grey forest semi-loam with 3,82% of organic matter content, slightly acidic pH 6,5. Nitrate nitrogen content was 13 mg/kg, labile phosphorus – 14.8 mg/100 g and exchangeable potassium – 10,6 mg/100 g soil. Yield comparison of new high-intensive locally bred potato varieties, as well as well-known global standards (Gala and Rozara) was held. Weather conditions during the years of the trials varied in temperature and sum of precipitation. In general, the temperature in May, June and first half of July was higher while average daily temperature of surface air was lower in August and September. Sum of precipitation in average during the trial years was 38 mm higher than long-run annual average and amounted to 331 mm. During 3 year trials the yield, marketability and tuber size distribution data was assessed; as well as flexibility of the assessed varieties (6 – early maturing, 11 – mid-early maturing, 11 – mid-maturing). It was noted that the plant tops of early-maturing varieties wilted naturally. Varieties Legenda and Una were marked apart for the amount of marketable tubers. Bigger amount of smaller tubers was the most present in the yield of Legenda and Rozara. Maximum average tuber weight was 118 g for variety Rozara, Gulliver – 105 g. It was noted, that these varieties had the most marketable tubers. It was discovered that several mid-early maturing varieties retained plant tops at the time of lifting (Zumba, Ariel, Salsa, Mayak, Armada and Osetinskii). Among this maturity group – Sadon, Varyag and Gala had the most marketable tubers. Average tuber weight was higher among Gala, Sadon and Ariel. During the research of mid-maturing varieties, the presence of plant tops was noted at the weight range from 0,41 to 1,76 kg. Varieties Flagman and Krasa Mesheri had the most marketable tubers. Krasa Mesheri, Evpatii, Plamya and Grand were noted for average tuber weight. Varieties Krasa Mesheri and Zlatka had higher marketable tuber weight. Maximum tuber weight was discovered in Una – 36,4 t/ha and Terra – 35,5 t/ha (early maturing); Ariel – 70,9 t/ha, Armada – 56,4 t/ha and Varyag – 49,6 t/ha (mid-early maturing), also Plamya – 67,9 t/ha, Evpatii – 40,6 t/ha and Krasa Mesheri – 40,4 t/ha (mid-maturing). The most resistant to plant and tuber diseases were Rozara, Terra and Una (early maturing), Sadon, Zumba and Gala (mid-early maturing), Evpatii and Zlatka (mid-maturing).

Key words: potato, variety, size distribution, tuber weight, marketability, yield