Ribes × nidigrolaria Rud. Bauer & A. Bauer - Grossulariaceae - jostaberry, **Jostabeere**, Jochelbeere

"Ribes x nidigrolaria, best known as Jostaberry, is an artificial, fertile F-2 amphidiploid hybrid of complex parentage from crossbreeding of the F1-hybrid (Ribes nigrum ‘Langtraubige Schwarze’ x R. divaricatum) resistant to mildew and the F-1 hybrid (R. nigrum ‘Silvergieters Schwarze’ x R. grossularia ‘Grune Hansa’) resistant to white pine blister rust by Dr. Rudolf Bauer in Germany (Bauer 1973, 1986; Bauer and Weber 1989). The first cultivar of R. x nidigrolaria was introduced by Dr.Bauer in 1977 under the name josta. The resulting double hybrids carries the characteristics of their four genetical grand parents with combined mildew and rust resistance, resistance to other leaf-fall diseases and to gall mite and have sufficient self-fertility (Baeur 1973). This hybrid is sometimes erroneously referred to as Ribes x culverwellii MacFarlane." \\
[Lim, T. K. (2012). Ribes x nidigrolaria. In Edible Medicinal And Non-Medicinal Plants (pp. 56-58). Springer Netherlands]

"Volatiles of jostaberries (Ribes x nidigrolaria Bauer) - a hybrid of black currant (Ribes nigrum L.) and gooseberry (Ribes uva-crispa L.) - were isolated via vacuum headspace extraction and analyzed by capillary gas chromatographic methods for the first time. (E)-Hex-2-enal, (E)-hex-2-en-1-ol, (Z)-hex-3-enal, (Z)-hex-3-en-1-ol, methyl butanoate, ethyl butanoate, 2-methylbut-3-en-2-ol, and 1,8-cineol turned out to be the most dominant volatiles. The variability of the volatile profile was shown by the analysis of jostaberries harvested from different locations in Southern Germany and in different years. In addition to ripe jostaberries, underripe berries were also investigated and changes in the volatile profile were followed during the ripening process. By using sensory analysis, key aroma compounds were elucidated. An aroma model prepared by mixing most odor active compounds ((Z)-hex-3-enal, 1,8-cineol, ethyl butanoate, (E)-hex-2-enal, (E)-hex-3-enal, hexanal, pent-1-en-3-one, methyl butanoate, ethyl hexanoate, and oct-1-en-3-one) in their naturally occurring concentrations showed an overall aroma very similar to that of fresh jostaberries." \\
[Analysis and Sensory Evaluation of Jostaberry (Ribes x nidigrolaria Bauer) Volatiles., Hempfling, K., Fastowski, O., Celik, J., Engel, K.H., Journal of agricultural and food chemistry, Vol.61(38), 2013, 9067-9075]

Dominating volatile compounds of fresh ripe jostaberries were (E)-hex-2-enal (13mg/kg), (Z)-hex-3-enal (6mg/kg) methyl butanoate (2mg/kg) and 2-methylbut-3-en-2-ol (1mg/kg). The C6 profile of R.nidigrolaria was similar to that of R.nigrum, whereas the ester profile was more like that of R.uva-crispa. \\
[Kapillargaschromatographische und sensorische Untersuchungen flüchtiger Verbindungen in Stachelbeeren (Ribes uva crispa L.) und Jostabeeren (Ribes x nidigrolaria Bauer)., Schrade, K.S., Doctoral dissertation, München, Technische Universität München, Diss., 2014, 100ff] [[http://mediatum.ub.tum.de/doc/1183254/document.pdf]]

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Ribes × nidigrolaria flowers, [[https://creativecommons.org/licenses/by-sa/3.0/de/|CC BY-SA 3.0]], Author: Andreas Kraska

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Ribes × nidigrolaria fruits, [[https://creativecommons.org/licenses/by-sa/3.0/de/|CC BY-SA 3.0]], Author: Andreas Kraska