Somatic embryogenesis and polyploidy in grapevine: morphological shoot and leaf traits variations

Quercetin precipitation has become an increasingly common issue in red wine, often resulting in visually unpleasant sediments and diminished product quality.

The Southern Oregon American Viticultural Area (AVA) consists of the Applegate Valley, Rogue Valley, Umpqua Valley, Elkton Oregon, and Red Hills of Douglas County sub-AVAs (Figure 1) that are some of the many winegrape producing regions found within the intermountain valleys along the west coast of the United States.

Past VitisGen projects (VitisGen, 2012-2017, and VitisGen2, 2017-2022) generated groundbreaking technologies for the grapevine breeding community, from low-cost DNAmarker platforms to advances in computer vision phenotyping.

Antão Vaz is a Portuguese white grapevine variety grown mainly in the wine-growing regions of Southern Portugal, particularly in the Alentejo, Lisbon and Setúbal peninsula regions. It is a very vigorous and productive variety, giving the wines a strong identity. It needs heat and sunlight and prefers deep and dry soils, which makes it tolerant to scald caused by the high summer temperatures of Southern Portugal. However, this variety is very susceptible to downy mildew, caused by plasmopara viticola, a very destructive disease in years with rainy springs.

This work analyzes the social reproduction strategies of small and medium grape growers located in Luján de Cuyo, Mendoza, Argentina. Small grape growers are involved in a process of continuous “displacement” that corresponds to intra-generational and inter-generational mobility. It is observed that those who were part of the rural middle classes are facing their declassification with survival strategies that allow them to continue as owners in the productive chain.