Submitted to: American Journal of Potato Research
Publication Type: Abstract Only
Publication Acceptance Date: 5/16/1996
Publication Date: N/A
Citation: Interpretive Summary:
Technical Abstract: The Association of Potato Intergenebank Collaborators (APIC) has initiated a joint research project to assess changes in the genetic diversity in potato genebanks. Part of this work required recollecting samples of S. jamesii and S. fendleri from the exact sites in the wild from which germplasm held in the genebank had originally been collected. The following observations might be useful for further collecting or other in situ studies of these populations. Habitats are not stereotypic for either species. S. fendleri is generally found in alpine forests, but can co-occur with S. jamesii. Plants may be found in pure organic mulch, sand or gravel. A common factor is adequate moisture. They may be widespread over a large area, but usually are confined to localized colonies of less than 100 plants and difficult to find. Road making, logging or grazing may have influenced many of the populations observed. Reproduction is probably exclusively asexual in some of the habitats in most years. At some sites fruit fly larvae apparently have a significant impact on S. fendleri seed production. Collectors should expect that tubers may be far from the plant. Small plants without flowers and with tiny immature tubers may be the only materials available, so one must collect transplants. Most previous collections were in July or August but late September to early October may generally be better for collecting mature berries and/or tubers.