History and Pedigree
Trousseau Gris is a white mutation, occasionally found in Jura and once common in California under the name 'Gray Riesling'.
Genouillet is the result of a cross between Gouais Blanc (Heunisch) and Bastardo.
In 1938 Harold Olmo used Trousseau to pollinate the rupestris hybrid Alicante Ganzin to produce the Royalty variety.
Bastardo was crossed with the Georgian variety Saperavi to produce the Bastardo Magarachskii variety used in the Crimea.
Read more about this topic: Bastardo (grape)
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