Phylogenetic relationships of Cranichidinae and Prescottiinae (Orchidaceae, Cranichideae) inferred from plastid and nuclear DNA sequences.

Annals of Botany
Gerardo A SalazarMark W Chase

Abstract

Phylogenetic relationships of subtribes Cranichidinae and Prescottiinae, two diverse groups of neotropical terrestrial orchids, are not satisfactorily understood. A previous molecular phylogenetic study supported monophyly for Cranichidinae, but Prescottiinae consisted of two clades not sister to one another. However, that analysis included only 11 species and eight genera of these subtribes. Here, plastid and nuclear DNA sequences are analysed for an enlarged sample of genera and species of Cranichidinae and Prescottiinae with the aim of clarifying their relationships, evaluating the phylogenetic position of the monospecific genera Exalaria, Ocampoa and Pseudocranichis and examining the value of various structural traits as taxonomic markers. Approx. 6000 bp of nucleotide sequences from nuclear ribosomal (ITS) and plastid DNA (rbcL, matK-trnK and trnL-trnF) were analysed with cladistic parsimony and Bayesian inference for 45 species/14 genera of Cranichidinae and Prescottiinae (plus suitable outgroups). The utility of flower orientation, thickenings of velamen cell walls, hamular viscidium and pseudolabellum to mark clades recovered by the molecular analysis was assessed by tracing these characters on the molecular trees. Spir...Continue Reading

References

Jan 27, 1999·Bioinformatics·D Posada, K A Crandall
Aug 8, 2001·Journal of Neurology, Neurosurgery, and Psychiatry·P Maddison
May 4, 2004·Molecular Phylogenetics and Evolution·Mark P Simmons
Oct 1, 2001·American Journal of Botany·P J KoresM W Chase
Feb 1, 1999·American Journal of Botany·K M CameronD H Goldman

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Citations

Jan 6, 2010·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·S S Renner, H Schaefer
Apr 24, 2019·PeerJ·Dariusz L SzlachetkoNatalia Olędrzyńska
Aug 6, 2009·Annals of Botany·Michael F Fay, Mark W Chase
Oct 22, 2020·PeerJ·Yanqiong ChenJunwen Zhai
Feb 23, 2021·PeerJ·Marta KolanowskaSławomir Nowak

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