Plant Systematics and Evolution

, Volume 274, Issue 1–2, pp 37–45 | Cite as

A morphological study of species boundaries of the wild potato Solanum brevicaule complex: replicated field trials in Peru

  • N. M. B. Alvarez
  • I. E. Peralta
  • A. Salas
  • D. M. Spooner
Original Article


The Solanum brevicaule complex contains about 20 species of diploids (2n = 2x = 24), tetraploids (2n = 4x = 48) and hexaploids (2n = 6x = 72), distributed from central Peru south to northwestern Argentina. The complex is defined entirely by morphological similarity of its constituent members, which are very similar to each other and to some landraces of the cultivated potato, Solanum tuberosum. Conflicting taxonomic treatments are common among authors. Species boundaries within the complex have been studied with morphological phenetics from germplasm accessions planted in a field plot in the north central US, and with molecular marker data from RAPDs, low-copy nuclear RFLPs, and AFLPs. The present study compares these results with an additional replicated morphological study of the same germplasm accessions in a greenhouse environment in the high Andes of central Peru. The results support extensive reduction of species in the complex.


Phenetics Replicated field trials Solanum brevicaule complex Solanum sect. Petota 


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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • N. M. B. Alvarez
    • 1
  • I. E. Peralta
    • 2
    • 3
  • A. Salas
    • 4
  • D. M. Spooner
    • 1
  1. 1.Vegetable Crops Research Unit, USDA, Agricultural Research Service, Department of HorticultureUniversity of WisconsinMadisonUSA
  2. 2.Department of AgronomyNational University of CuyoChacras de Coria, Luján, MendozaArgentina
  3. 3.IADIZA-CONICETMendozaArgentina
  4. 4.International Potato CenterLimaPeru

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