Dissecting genetic architecture of grape proanthocyanidin composition through quantitative trait locus mapping.

ABSTRACT:

Background

Proanthocyanidins (PAs), or condensed tannins, are flavonoid polymers, widespread throughout the plant kingdom, which provide protection against herbivores while conferring organoleptic and nutritive values to plant-derived foods, such as wine. However, the genetic basis of qualitative and quantitative PA composition variation is still poorly understood. To elucidate the genetic architecture of the complex grape PA composition, we first carried out quantitative trait locus (QTL) analysis on a 191-individual pseudo-F1 progeny. Three categories of PA variables were assessed: total content, percentages of constitutive subunits and composite ratio variables. For nine functional candidate genes, among which eight co-located with QTLs, we performed association analyses using a

SUBMITTER: Huang YF 

PROVIDER: S-EPMC3312867 | biostudies-literature | 2012 Feb

REPOSITORIES: biostudies-literature