🍇 Chambourcin

Chambourcin is a black-berried interspecific grape variety bred in France by Joannès Seyve. VIVC classes it as a Vitis interspecific crossing for wine, with hermaphrodite flowers; France is the country of origin and the year of crossing is not recorded. VIVC lists five synonyms: 26205 Joannes Seyve, J.S. 26-205, Joannes Seyve 26-205, Johannes-Seyve 26 205 and JS26-205. The variety is registered in the European Catalogue, and 22 institutions hold it.

The breeder's pedigree is Seyve Villard 12-417 × Seibel 7053. SSR markers did not confirm it: a pedigree study by Röckel and colleagues (Vitis, 2021) showed that the true parents are Joannes Seyve 11369 and Plantet, and VIVC gives the same marker-confirmed pedigree. The study names Chambourcin as the resistant ancestor of Regent, a variety with Rpv3.1 (downy mildew) and Ren3 and Ren9 (powdery mildew). VIVC lists the resistance loci Ren3, Ren9, Rpv3.1 and Rpv3.2 for Chambourcin itself.

In France the variety appears as Chambourcin N in Annex 1 of the Catalogue officiel des variétés de vigne, the list of registered varieties validated by the vine section of the CTPS in 2015.