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Background  The plastome of embryophytes is known for its high degree of conservation in size, structure, gene content and linear order of genes. The duplication of entire tRNA genes or their arrangement in a tandem array composed by multiple pseudogene copies is extremely rare in the plastome. Pseudogene repeats of the  trn F gene have rarely been described from the chloroplast genome of angiosperms.    Findings  We report the discovery of duplicated copies of the original phenylalanine ( trn F GAA ) gene in Solanaceae that are specific to a larger clade within the Solanoideae subfamily. The pseudogene copies are composed of several highly structured motifs that are partial residues or entire parts of the anticodon, T- and D-domains of the original  trn F gene.    Conclusions  The Pseudosolanoid clade consists of 29 genera and includes many economically important plants such as potato, tomato, eggplant and pepper.    Electronic supplementary material  The online version of this article (doi:10.1186/2193-1801-2-459) contains supplementary material, which is available to authorized users.

Discovery of novel plastid phenylalanine (trn F) pseudogenes defines a distinctive clade in Solanaceae