a b s t r a c t
A germplasm set of twenty-five grapevine accessions, forming eleven groups of possible berry skin color
mutants, were genotyped with twelve microsatellite loci, being eleven of them identified as true color
mutants. The polyphenolic profiling of the confirmed mutant cultivars revealed a total of twenty-four
polyphenols, comprising non-colored compounds (phenolic acids, flavan-3-ols, flavonols and a stilbene)
and anthocyanins.
Results showed differences in the contribution of malvidin-3-O-glucoside to the characteristic Pinot
Noir anthocyanins profile. Regarding the two Pique-Poul colored variants, the lighter variant was richer
than the darker one in all classes of compounds, excepting anthocyanins. In Moscatel Galego Roxo the
F30H pathway seems to be more active than F3050H, resulting in higher amounts of cyanidin, precursor
of the cyanidin derivatives.
As far as we are aware, this is the first time that a relationship between the content of polyphenolic
compounds is established in groups of grape berry skin color mutant cultivars.
2015 Elsevier Ltd. All rights reserved.
1. Introduction
Grapevine (Vitis vinifera L.) is one of the most cultivated fruit
plants and