What is the most influential factor in determining the taste of wine?
Grape variety
The inherent flavour of any grape variety is influenced by the same factors that determine the varietal taste of any fruit.
Which genus is important for winemaking among the Vitacee family?
Vitis
Only the genus Vitis is significant for winemaking, with Vitis vinifera being the primary species grown for wine.
How many species in the genus Vitis are generally grown for wine?
One
Vitis vinifera and its many cultivars are the only species typically cultivated for winemaking.
What is the Vitacee?
A large and diverse group of plants
It includes various plants ranging from small pot-plants to sprawling vines.
What was the previous classification of Muscadinia?
Sub-genus of Vitis
Muscadinia is now considered its own genus due to differences in chromosome numbers.
What has happened to the number of genera in the botanical family Vitaceae?
Increased from 10 to 17
The classification is subject to change, with potential revisions to the number of genera.
Who is the author of The Science of Grapevines?
Professor Markus Keller
This book discusses the classification and science of grapevines.
Fill in the blank: The Wine Vine Tree shows how Vitis vinifera relates to the rest of the _______.
vine family
This tree illustrates the relationship of Vitis vinifera within the broader context of the Vitacee family.
What is the relationship between fruit size and flavor concentration?
The smaller the fruit, the more concentrated the flavour will be
Most classic grape varieties, such as Cabernet Sauvignon and Riesling, have small berries.
Which grape variety is known as Petit Vidure?
Cabernet Sauvignon
Gros Vidure refers to Cabernet Franc.
What is the significance of skin structure in grapes?
The skin contains most of the aromatic characteristics associated with varietal identity
Its construction and thickness are of paramount importance.
How does the thickness of grape skin affect wine aroma?
Thick-skinned grapes produce aromatic wines; thin-skinned grapes may produce neutral wines
For example, Sauvignon Blanc has thick skin and produces aromatic wine, while Sémillon has thin skin and is more neutral.
What are the aromatic variations of Sauvignon Blanc when ripe?
When underripe, it varies from grassy to elderflower and even cat’s pee.
What type of wine can thin-skinned Sémillon produce?
One of the world’s greatest botrytised sweet wines
Its thin skin makes it susceptible to noble rot, resulting in mind-blowing aromatics.
What is the effect of skin colour and thickness on wine color?
Example: Cabernet Sauvignon vs. Merlot.
What factors determine the balance of a wine?
These elements dictate the wine’s alcohol level and natural sweetness.
What influences the ultimate flavour of a grape?
Genetics dictate the end result despite other factors.
What are the three vine species commonly used for developing rootstock varieties?
These species are known for their phylloxera resistance.
The choice of rootstock affects which two main aspects of grapevines?
The choice can influence a vine’s productivity and the quality of wine produced.
True or false: The lower the quantity of grapes produced, the higher the quality of wine.
TRUE
This principle suggests a direct relationship between grape yield and wine quality.
Fill in the blank: The precise choice of rootstock is dependent on its suitability to the _______.
vinestock
This choice is crucial for successful grafting and overall vine health.
How does rootstock influence a vine’s productivity?
The impact of rootstock selection can significantly affect the grape yield.
What is a cross in grape varieties?
A cross is a combination of grape varieties within one species
It results in new strains that may not be the same as the parent varieties.
What is a hybrid in grape varieties?
A hybrid is a cross between grape varieties from different species
Hybrids can exhibit characteristics from both parent species.