Subvariety is defined by Dr Ian D’Agata (2014, p.570) as ‘different-looking individuals of the same species’. The example he gives is a black-coated jaguar being a sub-variety of jaguar. However he says that for wine grapes ‘subvarieties are more correctly called biotypes, individuals considered genetically identical (at the current state of scientific knowledge) but show obvious phenotypic differences,’ See biotype