Georgian Grapevine Cultivars: Ancient Biodiversity for Future Viticulture

Area of Science:

• Agricultural Science
• Plant Genetics
• Horticulture

Background:

• Grapevine (Vitis vinifera) is a globally significant crop, crucial for fruit and wine production.
• The wine sector's economic importance drives research into grapevine germplasm biodiversity for breeding.
• Georgia is recognized as a center of origin for Vitis vinifera, with unique genetic resources.

Purpose of the Study:

• To evaluate the potential of Georgian grapevine cultivars as a source of valuable traits for breeding programs.
• To explore the unique genetic and phenotypic diversity within Georgian Vitis vinifera germplasm.
• To understand the quality of these genetic resources for future viticulture, especially concerning climate change.

Main Methods:

• Literature review of existing studies on Georgian grapevine germplasm.
• Analysis of genetic diversity patterns, comparing Georgian and European clusters.
• Assessment of phenotypic traits, including eno-carpological, phenological, and stress resistance characteristics.

Main Results:

• Georgian Vitis vinifera germplasm forms a distinct genetic cluster separate from European varieties.
• This germplasm exhibits rich diversity in traits such as fruit characteristics, phenology, and resistance to pathogens (oomycetes, phytoplasmas) and abiotic stresses (sunburn).
• Unique genetic and phenotypic aspects of Georgian cultivars have been identified.

Conclusions:

• Georgian grapevine germplasm represents a valuable and underutilized resource for breeding programs.
• Its diverse traits offer significant potential for developing new grapevine varieties adapted to changing environmental conditions and disease pressures.
• Harnessing this genetic diversity is crucial for the future sustainability and resilience of viticulture worldwide.