Breeding strategies for wine grapes: From genetic analysis of agronomic traits to wine sensory evaluation
type: CreativeWork
description: The main objectives of this research were the analysis of the genetic basis of agronomic traits in wine grape, the assessment of the influence of berry size in the oenological composition of segregating progenies and clones; and the sensory evaluation of wines derived from Graciano × Tempranillo selections. Two segregating progenies derived from Grenache × Tempranillo (130 genotypes) and Graciano × Tempranillo (151 genotypes) were evaluated for 26 agronomic traits, including berry, flower, seed, phenology and productivity characters from 2014 to 2017, assessing the influence of sex at the phenotypic level. All traits except berry shape showed transgressive segregation and large phenotypic variability in both progenies, essential for the selection of new genotypes with improved attributes. Female plants showed significant differences in flower shape and diameter, number of seeds, and flowering and veraison onset dates when compared with hermaphrodites in both genetic backgrounds. Eleven red-berry and eleven white-berry genotypes were pre-selected in the Grenache × Tempranillo population, based on berry weight, cluster weight, acidity and ripening date. In order to investigate the major regions controlling 26 agronomic traits, Quantitative Trait Loci (QTL) analyses were conducted in two (Graciano × Tempranillo) and up to four seasons (Garnacha × Tempranillo); assessing the influence of Sex locus. Parental and consensus genetic maps were developed for the Grenache × Tempranillo progeny, genotyped using GBS (genotype-by-sequencing) methodology, with 1300 informative markers. The consensus map covered 1540 cM distributed in 19 linkage groups, with an average interval length of 1.2 cM between markers. Significant and reproducible QTL were detected for berry and flower morphology, must composition, productivity and phenology; and candidate genes were found within the confidence intervals of several identified QTL. Moreover, a QTL region in LG2 was identified for flower-mor…
abstract: The main objectives of this research were the analysis of the genetic basis of agronomic traits in wine grape, the assessment of the influence of berry size in the oenological composition of segregating progenies and clones; and the sensory evaluation of wines derived from Graciano × Tempranillo selections. Two segregating progenies derived from Grenache × Tempranillo (130 genotypes) and Graciano × Tempranillo (151 genotypes) were evaluated for 26 agronomic traits, including berry, flower, seed, phenology and productivity characters from 2014 to 2017, assessing the influence of sex at the phenotypic level. All traits except berry shape showed transgressive segregation and large phenotypic variability in both progenies, essential for the selection of new genotypes with improved attributes. Female plants showed significant differences in flower shape and diameter, number of seeds, and flowering and veraison onset dates when compared with hermaphrodites in both genetic backgrounds. Eleven red-berry and eleven white-berry genotypes were pre-selected in the Grenache × Tempranillo population, based on berry weight, cluster weight, acidity and ripening date. In order to investigate the major regions controlling 26 agronomic traits, Quantitative Trait Loci (QTL) analyses were conducted in two (Graciano × Tempranillo) and up to four seasons (Garnacha × Tempranillo); assessing the influence of Sex locus. Parental and consensus genetic maps were developed for the Grenache × Tempranillo progeny, genotyped using GBS (genotype-by-sequencing) methodology, with 1300 informative markers. The consensus map covered 1540 cM distributed in 19 linkage groups, with an average interval length of 1.2 cM between markers. Significant and reproducible QTL were detected for berry and flower morphology, must composition, productivity and phenology; and candidate genes were found within the confidence intervals of several identified QTL. Moreover, a QTL region in LG2 was identified for flower-mor…
author: Manso Martínez, Cristina
language: eng
keywords: Tempranillo progenies, QTL, berry size, flower sex, Vitis vinifera L, Progenies de Tempranillo, tamaño de baya, sexo de la flor, Vitis vinífera L
date published: 2020
date modified: 2026-07-24T06:26:57Z
provider: Dialnet
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Universidad de La Rioja (España)