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Grape colour phenotyping: Development of a method based on the reflectance spectrum

Phytochemical Analysis, ISSN: 1099-1565, Vol: 24, Issue: 5, Page: 453-459
2013
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Article Description

Introduction The colour of fruit is an important quality factor for cultivar classification and phenotyping techniques. Besides the subjective visual evaluation, new instruments and techniques can be used. Objectives This work aims at developping an objective, fast, easy and non-destructive method as a useful support for evaluating grapes' colour under different cultural and environmental conditions, as well as for breeding process and germplasm evaluation, supporting the plant characterization and the biodiversity preservation. Materials and Methods Colours of 120 grape varieties were studied using reflectance spectra. The classification was realized using cluster and discriminant analysis. Reflectance of the whole berries surface was also compared with absorption properties of single skin extracts. Results A phenotyping method based on the reflectance spectra was developed, producing reliable colour classifications. A cultivar-independent index for pigment content evaluation has also been obtained. Conclusions This work allowed the classification of the berry colour using an objective method. Copyright © 2013 John Wiley & Sons, Ltd. A phenotyping method was developed based on reflectance spectra from 120 grape varieties. The cluster analysis, together with the discriminant analysis, produced reliable classifications. The reflectance spectra of the surface of whole berries were also compared with the absorption properties of single skin extracts. In this way, a cultivar-independent index was obtained in order to evaluate the pigment content in a non-destructive way. Copyright © 2013 John Wiley & Sons, Ltd.

Bibliographic Details

Rustioni, Laura; Basilico, Roberto; Fiori, Simone; Leoni, Alessandra; Maghradze, David; Failla, Osvaldo

Wiley

Chemistry; Agricultural and Biological Sciences; Biochemistry, Genetics and Molecular Biology; Pharmacology, Toxicology and Pharmaceutics; Medicine

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