Crop Science Journal of Natural Resources and Life Sciences Education
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Published online 22 February 2008
Published in Crop Sci 48:S-27-S-36 (2008)
© 2008 Crop Science Society of America
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Genomic Origins of Potato Polyploids: GBSSI Gene Sequencing Data

David M. Spoonera,*, Flor Rodrígueza, Zsolt Polgárb, Harvey E. Ballard, Jr.c and Shelley H. Janskya

a USDA-ARS, Dep. of Horticulture, University of Wisconsin, 1575 Linden Dr., Madison, WI 53706-1590
b University of Pannonia, Center of Agricultural Sciences, Potato Research Centre, 8360 Keszthely, Deak F. u. 16., Hungary
c Dep. of Environmental and Plant Biology, Ohio University, 317 Porter Hall, Athens, OH 45701-2979

* Corresponding author (david.spooner{at}ars.usda.gov).

Chromosome pairing relationships within cultivated potato (Solanum tuberosum) and its wild tuber-bearing relatives (Solanum sect. Petota) have been interpreted by genome formulas, developed in the early 1900s, through techniques of classic meiotic analysis of interspecific hybrids. Here we reexamine potato genome hypotheses with the first phylogenetic analysis of all major genomes of sect. Petota using cloned DNA sequences of the single-copy nuclear gene GBSSI (waxy). Our results provide the first molecular confirmation of allopolyploidy in wild potato. They both support prior hypotheses and identify novel genome origins never before proposed. The data will be useful to help design crossing strategies to incorporate wild species germplasm into cultivated potato.

Abbreviations: AFLP, amplified fragment length polymorphism • EBN, endosperm balance number • MP, maximum parsimony

We thank the U.S. Potato Genebank, The C.M. Rick Tomato Genetic Resources Center, Gregory Anderson, Thomas Mione, and Richard Olmstead for providing seeds or germplasm samples for this study; Holly Ruess and Sarah Stephenson for technical assistance; and Jeffrey Doyle, Sara Hoot, and Randy Small for reviews. Names are necessary to report data. However, the USDA neither guarantees nor warrants the standard of the product, and the use of the name by the USDA implies no approval of the product to the exclusion of others that may also be suitable. This research was supported by the USDA and NSF DEB 0316614 to David Spooner entitled "PBI Solanum: A worldwide treatment (http://www.nhm.ac.uk/research-curation/projects/solanaceaesource//)."

Received for publication September 11, 2007.




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