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CHLOROPLAST DNA EVIDENCE FOR THE INTERRELATIONSHIPS OF TOMATOES,POTATOES, AND PEPINOS (SOLANACEAE) |
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| Authors: | David M Spooner Gregory J Anderson Robert K Jansen |
| Institution: | Vegetable Crops Research Unit, Agricultural Research Service, USDA, Department of Horticulture, 1575 Linden Drive, University of Wisconsin, Madison, Wisconsin, 53706-1590
Department of Ecology and Evolutionary Biology U-43, University of Connecticut, Storrs, Connecticut, 06269-3043 Department of Botany, University of Texas, Austin, Texas, 78713-7640 |
| Abstract: | We used chloroplast DNA restriction site analysis to test hypotheses of relationships of Solarium subgenus Potatoe (including potatoes and pepinos), two other Solanum, Cyphomandra (the tree tomatoes), and Lycopersicon (the tomatoes). Capsicum and Datura were used as outgroups. The results support two main clades among the taxa we studied: 1) Solanum subgenus Potatoe and Lycopersicon; and 2) other Solanum and Cyphomandra. Within the first clade, the following groups were supported: a) sect. Basarthrum and sect. Anarrhichomenum; b) sect. Etuberosum; c) sect. Petota; d) sect. Juglandifolium, including subsect. Lycopersicoides; and e) the genus Lycopersicon. These results, in combination with an analysis of morphological data, advocate the controversial, but previously suggested, treatment of Lycopersicon as congeneric with Solanum in subgenus Potatoe. Thus, the cultivated tomato will be recognized as Solanum lycopersicum L. Solanum chmielewskii and Solanum lycopersicum var. cerasiforme are proposed as new combinations; Solanum neorickii is proposed as a new name for Lycopersicon parviflorum. Our data also suggest that Cyphomandra should be included within Solanum. |
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