Regarding the parentage of grape varieties, see parentage.
As far as is known, the parentage of the grape varieties is indicated under the relevant keywords. Further information can be found under the grape variety keywords (see, for example, Grüner Veltliner and Riesling). Further information on the topic can be found under the keywords:
The glossary is a monumental achievement and one of the most important contributions to wine knowledge. Of all the encyclopaedias I use on the subject of wine, it is by far the most important. That was the case ten years ago and it hasn't changed since.
Andreas Essl
Autor, Modena