Submitted to: Solanaceae International Congress Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 5/29/2006
Publication Date: 7/30/2006
Citation: Ames, M., Salas, A., Spooner, D.M. 2006. Taxonomic evaluation of putatively related wild potato species of solanum series cuneoalata, ingifolia, olmosiana, piurana, and simplicissima, by morphological data from an andean field station in Peru [abstract]. Solanaceae International Congress Proceedings. p. 146. Interpretive Summary:
Technical Abstract: Solanum series Piurana (15 species) is one of the nineteen tuber-bearing series recognized in Hawkes’ last taxonomic treatment of wild potatoes (section Petota) in 1990. Although it contains some of the morphologically most distinctive species in the section, its definition as a series has always been controversial. Correll stated in 1962 "This series, probably more than any others, may be considered a catchall. Paradoxically, its component species are held together not so much by their similarity as by their differences." Perhaps the most distinctive features of species from this series are shiny leaves and moniliform tubers. We studied the morphological support for species and series boundaries of series Piurana and of other species that we think may be within or closely related to series Piurana in series Cuneoalata (3 species), Ingifolia (2), Olmosiana (1), Simplicissima (2), and Tuberosa (10). All of these species occur from southern Colombia to central Peru. We assessed 82 characters from 200 germplasm accessions from the US and CIP genebanks, in a field station in Andean Peru. Our results define three broad groups of species to contain: 1) S. hypacrarthrum and S. simplicissimum (containing a large terminal leaflet and white corollas), 2) a group of species (such S. albornozii, S. chiquidenum, S. cantense), containing tall and robust plants, and white to light lilac corollas, and 3) a group of species (such as S. andreanum, S. paucijugum, S. chomatophilum) containing mostly smaller plants with blue to purple corollas. Morphological data suggest that some of these species are not worthy of recognition. For example, S. hypacrarthrum and S. simplicissimum may be conspecific, and S. chomatophilum, S. jalcae, and S. huarochieriense may be conspecific The morphological data remain ambiguous regarding some species boundaries, series affiliations, and relationships. These questions are the focus of our present work using multiple molecular markers.