Location: Grape Genetics Research
Title: QTL analysis of fruit quality traits in muscadine grapes Authors
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: January 17, 2014
Publication Date: N/A
Technical Abstract: Muscadine grapes (Vitis rotundifolia) are an important native fruit crop grown in the southeastern United States. To facilitate the breeding of improved cultivars of muscadine grapes a quantitative trait loci (QTL) analysis was conducted on several flower and fruit characteristics of two segregating populations of muscadine grapes. Genetic linkage maps were constructed with 172 individual vines from a cross of ‘Black Beauty’ × ‘Nesbitt’ and 173 individual vines of ‘Supreme’ × ‘Nesbitt’. Molecular markers were generated using genotyping-by-sequencing (GBS) and analyzed utilizing the UNEAK bio-informatic pipeline. In 2011 and 2012 flower sex, berry color, berry weight at harvest, berry pH and titratable acidity at harvest were measured for each individual. Genetic linkage maps were constructed and significant QTL were identified for the traits of interest in both populations. The prospects are discussed for the potential interest in use of these results for marker-assisted selection of flower and fruit quality traits within muscadine breeding programs.