The red grape variety (also Geilweilerhof 67-198-3, GF. 67-198-3) is an interspecific new breed between Diana (1) x Chambourcin, They are genes from Vitis labrusca. Vitis lincecumii. Vitis rupestris and Vitis vinifera contain. The crossing of the hybrid was done in 1967 by Dr. Gerhardt Alleweldt (1927-2005) at the institute Geilweilerhof in Siebeldingen / Pfalz. The name derives from the famous diamond (140.5 carat), which was in 1722 when Louis XV. (1710-1774) was on its crown and later Marie-Antoinette (1755-1793) often wore. He also adorned the epee of Kaiser Napoleon Bonaparte (1769-1821), today he is in the Louvre. The variety was a cross partner of the new varieties Calandro. Julius and Reberger,
With up to 300 mg / l, the Regent variety has a high proportion of anthocyanin Malvidin-3,5-diglucoside, which clearly indicates genes ex vitis labrusca. In the course of a study, however, it was classified as "Vitis-vinifera" in 1996 because of "only a few American genes" (see under hybrids ). The early ripening vine is resistant to frost, both mildews and Botrytis, It produces colorful, full-bodied red wines with velvety tannins and aromas of cherries. The largest acreage is in Germany with 2,122 hectares. There are also other stocks in Belgium. England (19 ha), Italy (3 ha), Austria. Romania (1 ha), Switzerland (41 ha) and Hungary (3 ha). A total of 2,192 hectares were recorded in 2010.
Images: Ursula Brühl, Doris Schneider, Julius Kühn Institute (JKI)