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1H-NMR Profiling and Carbon Isotope Discrimination as Tools for the Comparative Assessment of Walnut (Juglans regia L.) Cultivars with Various Geographical and Genetic Origins—A Preliminary Study

1
National Research and Development Institute for Cryogenics and Isotopic Technologies-ICSI Rm. Valcea, ICSI Analytics Group, 4 Uzinei Street, RO-240050 Râmnicu Vâlcea, Romania
2
University of Craiova, Faculty of Horticulture, Department of Horticulture and Food Science, 13 Al. I. Cuza Street, RO-200585 Craiova, Romania
3
University of Craiova, Fruit Growing Research Station (SCDP) Vâlcea, 464 Calea lui Traian Street, RO-240273 Râmnicu Vâlcea, Romania
*
Author to whom correspondence should be addressed.
Academic Editors: Alessandra Gentili and Chiara Fanali
Molecules 2019, 24(7), 1378; https://doi.org/10.3390/molecules24071378
Received: 12 March 2019 / Revised: 29 March 2019 / Accepted: 1 April 2019 / Published: 8 April 2019
(This article belongs to the Special Issue Advances in Food Analysis)
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Abstract

The aim of the study was to investigate the differences between walnut genotypes of various geographical and genetic origins grown under the same or different environmental conditions. The biological material analyzed consisted in walnut kernels of 34 cultivars, nine advanced selections, and six hybrids harvested in 2015 and 2016, summing up to a total of 64 samples. The walnuts, walnut oil, and residue were characterized in respect to their chemical (proximate composition—fat, protein, nutritional value, fatty acids profile by 1H-NMR) and carbon-13 isotopic composition. The data was used to statistically discriminate the cultivars according to composition, geographical area of origin, and year of harvest, comparing the Romanian cultivars, selections, and hybrids with the internationally available ones. View Full-Text
Keywords: δ13C-IRMS; fatty acids composition; 1H-NMR; walnut varieties δ13C-IRMS; fatty acids composition; 1H-NMR; walnut varieties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Popescu, R.; Ionete, R.E.; Botoran, O.R.; Costinel, D.; Bucura, F.; Geana, E.I.; ’Alabedallat, Y.F.J.; Botu, M. 1H-NMR Profiling and Carbon Isotope Discrimination as Tools for the Comparative Assessment of Walnut (Juglans regia L.) Cultivars with Various Geographical and Genetic Origins—A Preliminary Study. Molecules 2019, 24, 1378.

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