AFLP phylogeny of wild tomatoes.

SPOONER D. M.; PERALTA I. E.; KNAPP S.

San Diego, California, Estados Unidos

Conferencia; Plant & Animal Genome XI Conference.; 2003

Scherago International

Wild tomato species are native to western South America and the Galapagos Islands. Different classifications of tomatoes have been based on morphological or biological criteria. The phylogenetic relationships of all wild tomato species and closely related outgroups, with a concentration on the most widespread and variable tomato species Solanum peruvianum, was examined using morphological and molecular characters (DNA sequences of the structural gene granule-bound starch synthase, GBSSI, or waxy, and AFLP). Results show some concordance with previous morphology-based classifications, and new relationships. Outgroup relationships are largely concordant with prior chloroplast DNA restriction site phylogenies, and support S. juglandifolium and S. ochranthum as the closest outgroup to tomatoes, with S. lycopersicoides and S. sitiens as basal to these. At the ingroup level, these results support allogamy, self incompatibility, and green fruits as primitive, and also support at least two species in the widely distributed and highly polymorphic species S. peruvianum.