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  • Title: Multivariate statistical analysis of the color-anthocyanin relationships in different soilless-grown strawberry genotypes.
    Author: Hernanz D, Recamales AF, Meléndez-Martínez AJ, González-Miret ML, Heredia FJ.
    Journal: J Agric Food Chem; 2008 Apr 23; 56(8):2735-41. PubMed ID: 18363328.
    Abstract:
    Apart from the need to assess the color of foods due to its preponderant role in their acceptability, there is currently a new trend consisting in the study of the relationships between the color and the pigments accounting for it. The color of five strawberry varieties cultivated in two different soilless systems has been studied, and an array of multivariate statistical methods have been performed to single out the color parameters that best discriminate among the different samples surveyed and to correlate them with the pigment content. It is concluded that there is not a direct relationship between the external and flesh colorations of the berries. Additionally, after discriminant methods were applied, it was noticed that, taking into account the strawberry varieties, >90% of the cases could be correctly classified, a noticeably lower percentage of correct classification (around 60%) being obtained when the type of cultivation system was selected as the criterion for discrimination. The best correlations of pigment-color coordinates were found between pelargonidin-3-rutinoside and the external a* (r= -0.87) followed by pelargonidin-3-glucoside and the internal L* (r= -0.72).
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