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Variation in tuber mineral concentrations among accessions of Solanum species held in the Commonwealth Potato Collection

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Abstract

The variation in tuber mineral concentrations amongst accessions of wild tuber-bearing Solanum species in the Commonwealth Potato Collection (CPC) was evaluated under greenhouse conditions. Selected CPC accessions, representing the eco-geographical distribution of wild potatoes, were grown to maturity in peat-based compost under controlled conditions. Tubers from five plants of each accession were harvested, bulked and their mineral composition analysed. Among the germplasm investigated, there was a greater range in tuber concentrations of some elements of nutritional significance to both plants and animals, such as Ca, Fe and Zn (6.7-fold, 3.6-fold, and 4.5-fold, respectively) than others, such as K, P and S (all less than threefold). Significant positive correlations were found between mean altitude of the species’ range and tuber P, K, Cu and Mg concentrations. The amount of diversity observed in the CPC collection indicates the existence of wide differences in tuber mineral accumulation among different potato accessions. This might be useful in breeding for nutritional improvement of potato tubers.

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Acknowledgements

We thank Dr. Colin Alexander (BioSS) for his advice on multivariate data analysis, and Gaynor Mackenzie (JHI) for assistance with maintaining the CPC accessions in the greenhouse. We also thank Jacqueline Thompson (JHI) for assistance with ICP-MS analysis. NKS gratefully acknowledges the financial support from the International Office, University of Nottingham for a Research Scholarship and JHI for an SCRI—Universities Ph.D. Scholarship. This work was supported by the Rural and Environment Science and Analytical Services Division (RESAS) of the Scottish Government.

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  1. Nithya K. Subramanian

    Present address: Department of Soil and Crop Sciences, Texas A&M University, College Station, TX, 77843, USA

Authors and Affiliations

  1. Cell and Molecular Sciences, The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, UK

    Nithya K. Subramanian & Gavin Ramsay

  2. Ecological Sciences, The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, UK

    Philip J. White

  3. Distinguished Scientist Fellowship Program, King Saud University, Riyadh, 11451, Kingdom of Saudi Arabia

    Philip J. White

  4. Division of Plant and Crop Sciences, University of Nottingham, Sutton Bonington Campus, Nottingham, Leicestershire, LE12 5RD, UK

    Nithya K. Subramanian & Martin R. Broadley

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  1. Nithya K. Subramanian
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Correspondence to Nithya K. Subramanian.

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Subramanian, N.K., White, P.J., Broadley, M.R. et al. Variation in tuber mineral concentrations among accessions of Solanum species held in the Commonwealth Potato Collection. Genet Resour Crop Evol 64, 1927–1935 (2017). https://doi.org/10.1007/s10722-016-0483-z

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  • DOI: https://doi.org/10.1007/s10722-016-0483-z

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