In the next couple of posts I am going to look at some photos taken during vendanges which highlight some oddities and insights into vines and wines which I have not covered in the story of the harvest.
This photo may look like a bunch of red grapes has been placed in amongst bunches of white grapes. The oddity is in fact that they came from the same vines. The grapes are mainly Grenache Blanc, the others are Grenache Gris. Grape varieties are basically variations of one another.
The Grenache family (Noir, Gris and Blanc) are all the same DNA, with the slightest mutation between them. This is also true of the Pinot family for example. In this case one or two of the Grenache Blanc vines has somehow produced one of the mutations in some of the bunches, the result is that a Grenache Blanc vine produced Grenache Gris grapes.
Grape breeding is a very inexact science. The crossing of grape varieties produces new varieties, eg Sauvignon Blanc and Cabernet Franc produced Cabernet Sauvignon. However, if I was to try to cross Sauvignon Blanc and Cabernet Franc it is unlikely that I would produce Cabernet Sauvignon vines, the original cross is a unique event.
The vines we see across vineyards worldwide are often cuttings propagated from successful vines which show characteristics favoured by the producer, such as quality or quantity of grapes. These clones are planted but, again, slight variety amongst the billions of cells in the vine means that they could well be different to the original vine, not identical clones at all.
Therefore, this case of grapes was fascinating to me. It is not that unusual for this to happen, but it certainly piques my interest as I learn more about grape varieties and grape growing.