Abstract
Nutrient deficiencies lead to various health issues and are common worldwide. Potato germplasm is a rich source of natural variations and genetic variability present in it can be exploited for developing nutrient-rich high-yielding potato varieties. In this study, variations in the yield, dry matter (DM) and mineral nutrients concentrations were evaluated in both peeled and unpeeled tubers of 243 highly diverse tetraploid potato accessions. These were raised under field conditions for two consecutive years. The germplasm studied has a wider range of variations in peeled tubers DM (13.71–27.80%), Fe (17.08–71.03 mg/kg), Zn (9.55–34.78 mg/kg), Cu (2.13–13.25 mg/kg), Mn (7.04–25.15), Ca (117.4-922.5 mg/kg), Mg (656.6-1510.6 mg/kg), S (1121.3-3765.8 mg/kg), K (1.20–3.09%), P (0.21–0.50%) and Mo (53.6–1164.0 ppb) concentrations compared to popular Indian potato varieties. Higher nutrient concentrations in whole tubers compared to tuber flesh suggest that these are present in high concentration in the tuber peripheral layers and peeling off the tubers results in the loss of nutrients. Highest loss due to peeling off the tubers was observed in Fe (35.63%) followed by Cu (22.80%), Mn (21.69%), Ca (21.27%), Mg (12.89%), K (12.75%), Zn (10.13%), and Mo (9.87%). The GCV and PCV for all the traits in peeled tubers ranged from 9.67 to 29.91%, and 13.84 to 43.32%, respectively. Several significant positive correlations were observed among the parameters and the first two principal components accounted for 39.37% of total variations. The results of this study will pave a way for the development of nutrient-rich high-yielding potato varieties.
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Acknowledgements
This work was financed by the Department of Science and Technology-Science and Engineering Board (DST-SERB) in the form of an externally funded project to Indian Council of Agricultural Research - Central Potato Research Institute (ICAR-CPRI), Shimla, India.
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Singh, B., Sharma, J., Bhardwaj, V. et al. Genotypic variations for tuber nutrient content, dry matter and agronomic traits in tetraploid potato germplasm. Physiol Mol Biol Plants 28, 1233–1248 (2022). https://doi.org/10.1007/s12298-022-01197-1
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DOI: https://doi.org/10.1007/s12298-022-01197-1