Rotberger is a wine

Wine

Wine is an alcoholic beverage, made of fermented fruit juice, usually from grapes. The natural chemical balance of grapes lets them ferment without the addition of sugars, acids, enzymes, or other nutrients. Grape wine is produced by fermenting crushed grapes using various types of yeast. Yeast...

 grape variety. Its parentage is not known with certainty but it is thought to be from a cross of Trollinger

Trollinger

Trollinger is a light-red, late-maturing wine grape variety that was originally cultivated in the wine regions of South Tyrol and Trentino.It probably reached the southern regions of Germany during Roman times...

 and Riesling

Riesling

Riesling is a white grape variety which originated in the Rhine region of Germany. Riesling is an aromatic grape variety displaying flowery, almost perfumed, aromas as well as high acidity. It is used to make dry, semi-sweet, sweet and sparkling white wines. Riesling wines are usually varietally...

 grapes). Dr. Heinrich Birk (1898-1973) produced the cross at the Geisenheim Grape Breeding Institute

Geisenheim Grape Breeding Institute

The Geisenheim Grape Breeding Institute was founded in 1872 and is located in Geisenheim, Rheingau, Germany. In 1876 professor Hermann Müller from Switzerland joined the institution, where he developed his namesake variety Müller-Thurgau , which became the most planted grape variety in Germany in...

 in 1928. It is used to produce fruit

Fruit

In broad terms, a fruit is a structure of a plant that contains its seeds.The term has different meanings dependent on context. In non-technical usage, such as food preparation, fruit normally means the fleshy seed-associated structures of certain plants that are sweet and edible in the raw state,...

y, early maturing light red wines in cool-climate areas. It is often best drunk when young and can be used to produce a rosé

Rosé

A rosé is a type of wine that has some of the color typical of a red wine, but only enough to turn it pink. The pink color can range from a pale orange to a vivid near-purple, depending on the grapes and wine making techniques.- Production techniques :There are three major ways to produce rosé...

 or sparkling wine

Sparkling wine

Sparkling wine is a wine with significant levels of carbon dioxide in it making it fizzy. The carbon dioxide may result from natural fermentation, either in a bottle, as with the méthode champenoise, in a large tank designed to withstand the pressures involved , or as a result of carbon dioxide...

. It has no relationship with the Rotburger variety bearing a nearly similar name which is also known as Zweigelt

Zweigelt

Zweigelt is a red wine grape variety developed in 1922, at the Federal Institute for Viticulture and Pomology at Klosterneuburg, Austria, by Fritz Zweigelt. It was a crossing of St. Laurent and Blaufränkisch. It is now the most widely-grown red grape variety in Austria, as well as having some...

.

Production of rotberger is quite small and primarily limited to Austria, Canada, Germany, and Liechtenstein.