Schwarzriesling
Ferdinand Regner argued that Pinot noir is a cross between Pinot Meunier (Schwarzriesling) and Traminer, but this claim has since been refuted. In fact Pinot Meunier has been shown to be a chimerical mutation (in the epidermal cells) which makes the shoot tips and leaves prominently hairy-white and the vine a little smaller and early ripening. Thus Pinot Meunier is a chimera with two tissue layers of different genetic makeup, both of which contain a mutation making them non-identical to, and mutations of, Pinot noir (as well as of any of the other color forms of pinot). As such, Pinot Meunier cannot be a parent of Pinot noir, and, indeed, it seems likely that chimerical mutations which can generate Pinot gris from other pinot (principally blanc or noir) may in turn be the genetic pathway for the emergence of Pinot Meunier.