Passport data include source and origin data of the accessions as well as the best fitting taxonomic identification (according to the curator).
An on line search facility is offered for passport and evaluation data of accessions that received a CGN number so far. Only samples that can be freely distributed (screened for quarantine diseases; enough seeds available; good germinability) are included in the 'regular' CGN collections.
The passport data can be downloaded for CGN accessions only or complete: incl. some duplicates, extinct accessions and receipt numbers (having no CGN accession number yet; from 3-1-2011, 2773 records).
Till 1994 (FAL, Germany) each accession was identified by a BGRC-number (Braunschweig Genetic Resources Collection; Hoekstra & Seidewitz, 1987). Once included in the CGN collection, they received a CGN accession number. Origin country, collector number and corresponding accession number in other genbanks are available. More data on accessions duplicated in other potato genebanks can be supplied, as the genebanks have shared their databases in the framework of APIC, the Association of Potato Intergenebank Collaborators (Bamberg et al., 1995; Huamán et al., 1996, 2000).
The provided potato species list is sorted per taxonomic series and includes pictures, info on Endosperm Balance Number, chromosome number, region of origin, altitude range.
A survey of the concepts of different potato taxonomists on the section Petota has been published by Spooner & van den Berg (1992).
The used taxonomic nomenclature follows Hawkes (1990), with some revisions from Spooner and colleagues. These revisions are conform the changes in nomenclature made at the US potato genebank NRSP-6 (Bamberg et al., 1996). Solanum palustre and S. brevidens are now considered to be the same (Contreras & Spooner) and the earlier name (palustre) has to be used according to rules of taxonomic nomenclature. S. toralapanum will be treated as a subspecies of S. megistacrolobum (Giannattasio & Spooner 1994a, 1994b). The two subspecies of S. microdontum (subsp. microdontum and subsp. gigantophyllum) have been synonymized (van den Berg & Spooner, 1992). S. astleyi became a subspecies of S. boliviense (Spooner et al., 1997). In the past many S. venturii accessions were renamed into S. okadae. Between S. coelestipetalum, S. bukasovii and S. multidissectum accessions were renamed several times. Another example of confusion are the species S. brachycarpum and S. iopetalum. So two genebanks may use different species names for the same sample. For an extensive literature review on potato systematics see: Spooner & Hijmans (2001). January 2002 the US potato genebank renamed all S. canasense accessions into S. bukasovii (Ochoa 1992). April 2004 they announced more changes in potato taxonomy, e.g. S. fendleri, S. leptosepalum, S. papita and S. polytrichon were synonymized with S. stoloniferum. Later S. tarijense was synonymyzed with S. berthaultii (Spooner et al., 2007). Other collections may adapt later.
The latest taxonomy for the genus Solanum is available via GRINTAX. Checkout S. candolleanum (33 spp. north of Lake Titicaca) and S. brevicaule (23 spp. south of Lake Titicaca) for the largest potato species mergers. The proposed merger of S. boliviense with S. megistacrolobum is under dispute (Jacobs et al. 2011). Also the merger of S. hannemanii with S. neorossii seems to conflict with the results from Jacobs et al. 2011.
The used species abbreviation codes follow Huaman & Ross (1985).