How do seedless grape varieties propagate?

Question

I realise these are created via selective breeding, but surely farmers must at some point plant the vines that grow them, so how do they do it?

Answer 1

It might come as a surprise to you but very rarely do vines propagate via seeds but rather by cuttings or "sleeping".

So you do not really need any seeds at all...

Answer 2

Grafts from an existing seedless vine to a normal vine grown from seed.

All seedless varieties must be grafted.

Answer 3

The grower has to propagate the varietals through cuttings and graftings.