Editing Trollinger (section)

==Sub-varieties and crossings==
[[File:Vernatsch THWZ edit.jpg|left|thumb|An Italian Vernatsch from South Tyrol.]]
In the Trentino-Alto Adige region, several sub-varieties or [[clones (vine)|clones]] of Trollinger have been identified. These include the large berry ''Schiava Grossa'' (also known as Grossvernatsch and Schiava Grigia) which is probably the highest [[yield (wine)|yielding]] clone, but tends to produce [[body (wine)|light bodied]] and neutral tasting wine, the smaller berry ''Schiava Gentile'' (also known as Kleinvernatsch), which tends to produce more [[aromatic (wine)|aromatic]] wines and ''Tschaggle'', which is the lowest yielding clone, but often produces the most critically acclaimed wines.<ref name="Robinson" /> Other known clones include Schiava Media and Schiava Piccola.<ref name="Saunders" />

In Württemberg, Trollinger was [[crossed (wine)|crossed]] with the white grape [[Riesling]] to produce the cross [[Kerner (grape)|Kerner]] in 1929 (received varietal protection and was released for general cultivation in 1969).<ref name="Walton">Stuart Walton, ''Understanding, Choosing and Enjoying Wine'' Hermes House 2006, p. 181 {{ISBN|0754800245}}.</ref> The new crossing was named after the local poet and medical writer, [[Justinus Kerner]].<ref name="German" /> The variety was also crossed with Muscat of Alexandria to produce Black Muscat.<ref name="Appellation" />

In 2010, [[DNA analysis]] suggested that the [[Emilia-Romagna]] wine grape [[Uva Tosca]] may be a natural crossing between Trollinger/Schiava Grossa and [[Crepallochi]].<ref name="Wine Grapes"/>