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ARS Home » Midwest Area » East Lansing, Michigan » Sugarbeet and Bean Research » Research » Publications at this Location » Publication #398438

Research Project: Utilizing Genetic Diversity within Phaseolus vulgaris to Develop Dry Beans with Enhanced Functional Properties

Location: Sugarbeet and Bean Research

Title: Genetic mapping and selection of table grape fruit quality characteristics in a segregating population and evaluation of marker transferability

item Naegele, Rachel
item Delong, Jeffery - Jeff
item Tabb, Amy
item Burhans, Alanna
item Yang, Hui-Ching
item Prins, Bernard - Bernie
item LONDO, JASON - Cornell University
item SUN, QI - Cornell University
item ZOU, CHENG - Cornell University
item CLARK, MATT - University Of Minnesota
item DE SOUSA MOREIRA, LAISE - University Of Minnesota
item VAN ZYL, SONET - California State University

Submitted to: Theoretical and Applied Genetics
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/14/2023
Publication Date: N/A
Citation: N/A

Interpretive Summary: Breeding improved fruit quality in grape is time and resource intensive. Tools that can streamline the process, such as molecular markers, reduce the time to develop new cultivars while cutting costs. Molecular markers for some traits such as seedlessness are available, but can not be used on a broad range of materials. In this study we evaluate existing molecular markers against a panel of commercial cultivars to determine if they can effectively predict the presence of a favorable trait. New molecular markers were also developed through this research and tested against the same panel of commercial cultivars to determine their transferability.

Technical Abstract: Grape production and fruit quality traits such as cluster size, berry shape, and timing of fruit development are key aspects in selecting cultivars for commercial production. Molecular markers for some, but not all, of these traits have been identified using bi-parental or association mapping populations. Previously identified markers were tested for transferability using a test panel of commercially available grape cultivars. Markers had little to no ability to differentiate grape phenotypes based on the expected characteristics, except the marker for seedlessness. Forty-three QTL, both previously identified molecular markers and new genomic regions, associated with berry shape, number, size, cluster weight, length, and time to flower, veraison and full color were detected. KASP markers designed on newly identified QTL were tested for transferability using the same panel. Comparison of a 4Mb region at the end of chromosome 18 revealed structural differences among grape species and use types. Table grape cultivars had the highest similarity in structure for this region (> 75%) compared to other grape species and commodity types.