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Phylogenetic Relationships Of Polemoniaceae: Inferences From Mitochondrial Nad1b Intron Sequences, J. Mark Porter, Leigh A. Johnson
Phylogenetic Relationships Of Polemoniaceae: Inferences From Mitochondrial Nad1b Intron Sequences, J. Mark Porter, Leigh A. Johnson
Aliso: A Journal of Systematic and Floristic Botany
The most recent assessments of phylogenetic relationships and diversification in the flowering plant family Polemoniaceae have relied on nuclear ribosomal and chloroplast DNA sequences. We employed the mitochondrial nad1b intron, located within the second transcription unit of the first subunit of NADH dehydrogenase, for phylogenetic inference. Maximum parsimony analysis of these data provided evidence that Polemoniaceae are more closely related to families Fouquieriaceae, Diapensiaceae, Styracaceae, and Primulaceae than to families of the Solananae, where it has been classified. Fouquieriaceae are inferred to be the sister group of Polemoniaceae; however, when indels are treated as additional characters and given twice the …