Evaluation of tuber yield and some quantitative and qualitative traits of 15 promising potato ‎genotypes in Ardebil region

High yield, earliness and high quality of new potato cultivars have an important role in food security, reducing price fluctuations and warehousing costs, and access to fresh produce all season years. In this study, quantitative and qualitative traits of 15 potato genotypes from breeding populations were studied in a completely randomized block design (RCBD) with three replications for two years (2017 and 2018) in Ardebil region. The results showed that interaction effect of genotype in year was significant for total tuber yield, marketable tuber yield, tuber number and weight per plant, plant height and days number to tuberization significant at the 1% level, and had no significant effects on number of main stem per plant, tuber dry matter percentage, tuber specific gravity, starch percentage, vitamin C and tuber protein percentage. Genotypes 901375, 90275, Savalan, 90527, 90127, 90827, Agria and Marfona had the highest yield during two years of experiment. Among the high yielding genotypes, genotypes 901375 and Savalan had the highest percentage of tuber dry matter, tuber specific gravity, tuber starch percentage, vitamin C of tuber and protein percentage. Genotypes 901375 and Savalan were selected as high yielding genotypes with appropriate qualitative traits based on yield and yield components of tuber and measured traits.