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Abstract Detail

Systematics Section/ASPT

TEPE , ERIC J [1], Bohs, Lynn [2].

The spud family tree: relationships within the Potato clade of the genus Solanum (Solanaceae).

With ca. 200 species, the Potato clade represents one of the larger subgroups of the enormous genus Solanum and, because its members include the potato (Solanum tuberosum), tomato (S. lycopersicum), and pepino (S. muricatum), it is the most economically important clade in the genus.  These species and their close relatives have been the focus of intensive research, but relationships among major lineages of the entire Potato clade remain poorly understood.  In this study, we use sequences from the nuclear ITS and waxy (GBSSI) and plastid trn TtrnF and trnStrnG to reconstruct a phylogeny and explore relationships within the Potato clade. The Potato clade emerges as a strongly supported monophyletic group and comprises eleven subclades which, for the most part, correspond to traditionally recognized sections.  Solanum sect. Regmandra is sister to the rest of the lineages of the Potato clade which are, in turn, organized into two major subclades: (i) sections Herpystichum and Pteroidea, and (ii) sections Anarrhichomenum, BasarthrumEtuberosum, Juglandifolia, Lycopersicoides, Lycopersicon, and Petota.  As in all other studies of these groups, sections Etuberosum, Juglandifolia, Lycopersicoides, Lycopersicon, and Petota form a strongly supported monophyletic group.  Solanum oxycoccoides, a high-elevation species endemic to north central Peru, has been tentatively assigned to several groups within Solanum based on morphological evidence, but instead the species appears to be an independent lineage sister to the second major subclade.

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1 - University of Cincinnati, Department of Biological Sciences, 614 Rieveschl Hall, Cincinnati, OH, 45221, USA
2 - University Of Utah, Department Of Biology, 257 SOUTH 1400 EAST, Salt Lake City, UT, 84112-0840, USA


Presentation Type: Poster:Posters for Sections
Session: P
Location: Eyrie/Boise Centre
Date: Monday, July 28th, 2014
Time: 5:30 PM
Number: PSY041
Abstract ID:428
Candidate for Awards:None

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