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    Effect of Genotype and Environment on the Glycoalkaloid Content of Rare, Heritage, and Commercial Potato Varieties

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    Author
    Valcarel, Jesus
    Reilly, Kim
    Gaffney, Michael
    O'Brien, Nora M.
    Keyword
    α-Chaconine
    Glycoalkaloids
    Potato
    α-Solanine
    Solanum tuberosum L
    Date
    02/04/2014
    
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    URI
    http://hdl.handle.net/11019/574
    Citation
    Valcarcel, J., Reilly, K., Gaffney, M. and O'Brien, N. (2014), Effect of Genotype and Environment on the Glycoalkaloid Content of Rare, Heritage, and Commercial Potato Varieties. Journal of Food Science. doi: 10.1111/1750-3841.12443
    Abstract
    Potatoes accumulate toxic steroidal compounds that could be harmful for humans if consumed in high quantities and must be controlled. In this study, we were interested in assessing the levels and variation of glycoalkaloid content in 60 varieties of potato planted in 2 trial sites over 2 y. Total glycoalkaloid levels ranged from 4 to 957 mg/kg of dry weight in the flesh and from 150 to 8133 mg/kg in the skin, with the latter accumulating generally more α-chaconine than α-solanine. Contents in the flesh were below the safe limit for all varieties, but were generally above in the skin. Maximum values in each site and year of cultivation were found for varieties “Beauty of Hebron,” “May Queen,” and “Arran Pilot” in the skin and “Beauty of Hebron,” “International Kidney,” and “Congo” in the flesh. Year of cultivation had a significant effect on total glycoalkaloid content (P < 0.0001), with interactions between variety and site of cultivation and variety and year of cultivation also significant (P < 0.0001), implying that environmental effects seem to act differentially and could induce high levels in genetically predisposed varieties.
    Funder
    Teagasc Walsh Fellowship Programme
    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.1111/1750-3841.12443
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    Horticulture
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