Blackcurrant material from the gooseberry ("Ribes grossularia"), the red currant ("Ribes rubrum") and the flowering currant ("Ribes sanguineum"). The resulting offspring were further back-crossed to "R. nigrum". Cultivars produced include 'Tisel' and 'Tiben' in 2000 and 'Ores', 'Ruben' and 'Tines' in 2005. Further cultivars 'Polares' and 'Tihope' are being tested. Since 1991, New Zealand has become an important centre for research and development, as its temperate climate is particularly suitable for cultivation of the crop. Breeding programmes are concentrating on yield, large fruit size, consistency of cropping and upright habit. In North America, there is a need for this fruit to
Ribes tularense Ribes tularense Ribes tularense is a rare species of currant known as the Sequoia gooseberry or Tulare gooseberry. It is endemic to southern California, at elevations between . "Ribes tularense" is known from only about ten populations in the forests of the High Sierra Nevada. These are located in Tulare County except for one population found less than 100 meters east of the county line near Mount Whitney in Inyo County. The species is closely related to "Ribes binominatum". "Ribes tularense" is a low, spiny shrub rarely more than 50 cm (20 inches) tall, often trailing. It has hairy branches