Figure 1.

Phylogeny of Solanaceae and the distribution and schematic structure oftrnF pseudogene copies. a) Suprageneric groups recognized are indicted to the right on the tree, while major clades are collapsed at the base node and their names follow Olmstead et al. (2008). The new Pseudosolanoid clade united by the presence of pseudogenic trnF gene duplication is marked with ‘ψ’ in the Solanoideae subfamily. b) The schematic representation of the plastidic trnL-F spacer region in Solanaceae and the intercalated pseudogene copies (PSC) in the intergenic spacer region close to 5′ of the trnF gene. Pseudogene repeats are variable in number and structure and are found after the putative promoter motifs that are also variable among species. The spacer region between the first PSC and promoter motifs consists of intergenic repeats of variable length. Each PSC is separated by a common bordering motif (ATTG) at the 5′end.