Date of Graduation
Summer 2021
Degree
Master of Science in Plant Science (Agriculture)
Department
College of Agriculture
Committee Chair
Chin-Feng Hwang
Abstract
Downy mildew caused by the fungus, Plasmopara viticola in the grapes is one of the major diseases affecting crop yield throughout the world. Breeding grapes via conventional methods for the downy mildew resistance will take approximately 25-30 years to fully evaluate and release new cultivars. Because of the long breeding cycle in woody plant species like grape, developing DNA markers linked to genes or quantitative trait loci (QTLs) for horticultural traits can greatly accelerate the breeding process and allow a much more accurate selection of progeny. This study aims to determine the presence of resistance in the 267 F1 genotypes developed by crossing the downy mildew resistant cultivar, Vitis interspecific hybrid ‘Chambourcin’, and the disease susceptible cultivar, V. vinifera ‘Cabernet Sauvignon’ using DNA markers. ‘Chambourcin’ has the Rpv3 downy mildew resistance locus. Using 4 simple sequence repeats (SSR) markers linked to the Rpv3 locus, UDV730, UDV734, UDV736, UDV737, the Rpv3 resistance alleles were examined among the hybrid progenies via marker-assisted selection. The data was analyzed to confirm which resistance allele sizes were passed down from the pedigree of the ‘Chambourcin’ to the hybrid progeny. This study will help provide the industry stakeholders from the grape and wine community with new cultivars that are adapted to Missouri.
Keywords
marker-assisted selection, downy mildew, susceptible, resistant, DNA markers
Subject Categories
Agriculture | Biotechnology | Genetics | Genetics and Genomics | Horticulture | Life Sciences | Molecular Genetics | Plant Biology | Plant Breeding and Genetics | Plant Sciences | Viticulture and Oenology
Copyright
©Kavya Sri Tummala
Recommended Citation
Tummala, Kavya Sri, "Marker-Assisted Selection to Determine the Introgression of Rpv-3 Mediated Downy Mildew Resistance in 'Chambourcin' X 'Caberenet Sauvignon' Grapevine Population" (2021). MSU Graduate Theses. 3652.
https://bearworks.missouristate.edu/theses/3652
Open Access
Included in
Biotechnology Commons, Genetics Commons, Horticulture Commons, Molecular Genetics Commons, Plant Biology Commons, Plant Breeding and Genetics Commons, Viticulture and Oenology Commons