|Van Den Berg, Ronald|
|Del Rio, Alfonso|
Submitted to: Acta Horticulturae
Publication Type: Abstract Only
Publication Acceptance Date: 7/1/2003
Publication Date: 11/1/2003
Citation: Van Den Berg, R.G., Bryan, G., Del Rio, A., Spooner, D.M. 2003. Reduction of species in the wild potato solanum section Petota series Longipedicellata: AFLP, RAPD and chloroplast SSR data.. Acta Horticulturae Abstract p. 102. Interpretive Summary:
Technical Abstract: Species boundaries were assessed with three molecular markers (AFLPs, RAPDs, chloroplast microsatellites, also known as chloroplast single sequence repeats [cpSSRs]) for all six species of wild potatoes (Solanum L. section Petota Dumort.) assigned to ser. Longipedicellata: S. fendleri, S. hjertingii, S. matehualae, S. papita, S. polytrichon, and S. stoloniferum. These tetraploid (2n = 4x = 48) species grow in the southeastern United States (S. fendleri) and Mexico (all six species), and a recent morphological analysis supported only three species: 1) S. polytrichon, 2) S. hjertingii (including S. matehualae), and 3) S. stoloniferum (including S. fendleri and S. papita). We analyzed all six species of ser. Longipedicellata, outgroup section Etuberosum and ser. Bulbocastana, ser. Pinnatisecta, ser. Polyadenia, and possible diploid A-genome contributors or close relatives in ser. Tuberosa, ser. Acaulia Juz., and ser. Demissa. Concordant with morphological data, AFLP and RAPD results support the synonymy of S. hjertingii and S. matehualae, and completely intermix S. papita and S. fendleri. However, accessions of S. stoloniferum have a tendency to cluster but with exceptions, and S. polytrichon is completely intermixed with S. fendleri and S. papita. The chloroplast DNA microsatellites fail to distinguish any of the species in ser. Longipedicellata, and in combined analyses with all three markers have little effect on results. Combined morphological and molecular data support only two species in ser. Longipedicellata: S. hjertingii and S. stoloniferum.