Quantitative Trait Loci (Qtl) Analysis Of Sulfur Sensitivity In Vitis Aestivalis-Derived 'Norton'

<p>The grape and wine industry relies heavily on sulfur and sulfur containing compounds to control the fungal disease powdery mildew (PM). Sulfur dioxide induces large-scale transcriptomic modification in the Eurasian grape species Vitis vinifera with little to no phytotoxicity. However, genetic factors contributing to sulfur sensitivity, characterized by vegetative necrosis and defoliation, remain undefined in North American grape species and their commercial hybrids. A mapping population, consisting of 147 F1 genotypes, was created by crossing V. aestivalis-derived ‘Norton’ and V. vinifera ‘Cabernet Sauvignon’ to identify the genetic basis for sulfur sensitivity in North American wine grapes. Clonally propagated F1 genotypes were fumigated with sulfur burners under greenhouse conditions. Association and linkage mapping were conducted using single nucleotide polymorphisms (SNPs) and simple sequence repeat (SSR) markers, respectively. A major quantitative trait loci (QTL) for sulfur sensitivity was detected on linkage group 14 (LOD=15). Identification of this QTL will allow future grape breeding programs produce commercially suitable hybrids, which do not display sulfur sensitivity, via marker assisted selection (MAS).</p>

Name thesis:degree_name

Master of Science in Plant Science (Agriculture)

Level thesis:degree_level

Masters

Discipline thesis:degree_discipline

College of Agriculture

Year

2016

Author dc:creator

• Duncan, Logan Michael

Contributors dc:contributor

• Chin-Feng Hwang

• sulfur metabolism
• sulfur sensitivity
• marker assisted selection (MAS)
• oxidative stress
• redox
• Plant Sciences

Statement dc:rights

• © Logan Michael Duncan

Repository record dc:identifier

https://bearworks.missouristate.edu/theses/4

OAI identifier oai:identifier

oai:bearworks.missouristate.edu:theses-1003