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The experiment was conducted in Randomized Block Design (RBD) with three replications in two sets of harvest period i.e. 90 and 105 days after planting (DAP) for tuber yield and processing traits in potato. The analysis of variance revealed that mean sum of squares due to genotypes was found highly significant for all the traits under study. The genotypes of MS/06-1947, K. Sadabahar and K. Khyati for 90 days and J/10-162, K. Sadabahar and MP/06-39 for 105 DAP were found promising for tuber yield per plant based on per se performance. The genotypes of MP/09901, MP/04-578 and MP/04-816 exhibited high tuber dry matter, while, the genotypes, K. Himsona, K.Chipsona 1 and K.Chipsona 2 had low reducing sugar under both 90 and 105 days of harvest. The low chip colour index was exerted by genotypes of K. Chipsona 2, K. Chipsona 1, K. Chipsona 3, K. Chipsona 4 and K. Frysona under 90 days, whereas, K. Chipsona 2, Atlantic and K. Chipsona 3 under 105 days of harvest. Therefore, these genotypes suited as processing purpose. The high heritability along with high genetic advance in leaf area, number of stems per hill, number of tubers per plant, processing grade tuber yield per plant, chip colour index, reducing sugar and total soluble solids under both harvesting periods, recommended that genotypic difference for the characters ascribed to high additive genetic cause and selection would be wrathful based on phenotypic performance. Article History Received: 02 July 2018 Accepted: 13 September 2018

Genetic Variability Among the Potato (Solanum tuberosum L.) Genotypes as Affected by Harvesting Period for Processing Purpose and Tuber Yield