TitleGenetic Variations in Tuber Dry Matter (%), Yield and Mineral Concentrations in a Diversity Panel of Tetraploid Potatoes
Publication TypeJournal Article
Year of Publication123
AuthorsSingh, B, Sharma, J, Sood, S, Bhardwaj, V, Siddappa, S, Dalamu, D, Kardile, HB, Sharma, V, · Dipta, B, Kumar, V, Dua, ·VK, Goutam, U, Pandey, ·NK
ISBN Number0123456789
KeywordsBiofortification, dry matter, Genotypic variation, mineral content, Potato germplasm

Potato is the world's most consumed non-grain staple food crop. Being a "poor man's crop", it is a modest source of nutrients. Mineral nutrients play crucial roles in the biochemical and physiological functioning of the human body. The objective of the present study was to determine the genetic variability in the tuber yield, dry matter content (DM %) and mineral concentrations and to determine the losses of minerals due to peeling off the tubers. The 115 potato accessions studied have tremendous variability for all the traits. The results revealed wide variations for DM % (14.58-27.47%), iron (19.40-58.80 mg/kg), zinc (9.55-26.19 mg/kg), manganese (8.07-24.73 mg/kg), copper (2.38-9.75 mg/kg), calcium (127.30-634.59 mg/kg), magnesium (604.43-1266.01 mg/kg), sulphur (1255.73-3199.35 mg/kg), phosphorous (0.21-0.43%) and potassium (1.58-2.84%) in tuber flesh. The mineral losses due to peeling off the tubers were determined. Maximum loss due to peeling was observed for iron (33.89%). The genotypic coefficient of variation (%) and the phe-notypic coefficient of variation (%) ranged between 9.50 to 21.85 and 12.73 to 30.63, respectively. Among the traits studied, broad-sense heritability (H 2) above 50% was observed for six traits. Various positive correlations were found among the traits. The first three principal components revealed 51.34% of the total variation.