Hybrid origins of cultivated potatoes

摘要: Solanum section Petota is taxonomically difficult, partly because of interspecific hybridization at both the diploid and polyploid levels. The taxonomy cultivated potatoes particularly controversial. Using DNA sequence data waxy gene, we here infer relationships among four species accepted in latest taxonomic treatment (S. ajanhuiri, S. curtilobum, juzepczukii tuberosum, latter divided into Andigenum Chilotanum Cultivar Groups). support prior ideas hybrid origins ajanhuiri from tuberosum Group (2x = stenotomum) × megistacrolobum; acaule; curtilobum (4x subsp. andigenum) juzepczukii. For tetraploid cultivar-groups are suggested entirely within much more closely related species, except for two three examined accessions that appear to have hybridized with wild maglia. Hybrid crop/weed sucrense difficult vernei not supported as a progenitor Group.