Genotyping-by-sequencing-based high-resolution mapping reveals a single candidate gene for the grapevine veraison
Lena Frenzke1, Franco Röckel2, Torsten Wenke3
1Institute of Botany, Technische Universität Dresden, 01062 Dresden, Germany.
Plant Physiology
|May 14, 2024
Summary
Researchers identified a key gene, VviERF027, controlling grapevine veraison timing. This discovery aids in breeding grape varieties resilient to climate change and improving wine quality.
Area of Science:
- Plant genetics
- Viticulture
- Climate change adaptation
Background:
- Veraison is a critical grapevine phenological stage influencing wine quality.
- Global temperature increases accelerate ripening, impacting grape quality.
- Controlling ripening time is essential for adapting viticulture to climate change.
Purpose of the Study:
- To identify the genetic basis of veraison timing in grapevines.
- To refine the genetic map of the veraison locus (Ver1).
- To pinpoint candidate genes responsible for early ripening traits.
Main Methods:
- Genotyping-by-sequencing and bioinformatics analysis of F1 genotypes.
- High-density genetic map construction and quantitative trait locus (QTL) analysis.
- Locus-specific marker enrichment and recombinant screening.
Main Results:
- Refined the veraison locus Ver1 on chromosome 16 to 112 kb.
- Identified VviERF027 as the candidate gene for veraison timing.
- Traced the early veraison allele to a 17th-century clonal Pinot variant.
Conclusions:
- VviERF027 plays a crucial role in regulating grapevine veraison.
- Understanding this gene facilitates breeding for climate-resilient grapevines.
- Findings support strategies for maintaining wine quality amidst climate change.
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