Generic affiliations of Canthium species placed under Pyrostria group B sensu Bridson (Vanguerieae, Rubiaceae) inferred from morphology and molecular data

Botanical Studies
Grecebio Jonathan D AlejandroAxel H Arriola

Abstract

Pyrostria sensu lato (s.l.) is regarded as one of the polyphyletic group within Vanguerieae formerly comprising of Pyrostria sensu stricto (s.s.), Pyrostria group A and Pyrostria group B delineated by the number of locules and geographical occurrence. Recent molecular phylogenetic studies within the genus have narrowed its circumscription that resulted in the merging of Pyrostria group A and Pyrostria s.s. Although some species of Pyrostria group B were already transferred to Pyrostria s.s. and Psydrax based on morphology, other representatives of the group remain unsettled. Bayesian and parsimony analysis of the combined ITS (nrDNA) and trnL-F (cpDNA) datasets showed a well-supported clade of the whole Vanguerieae containing four Philippine endemic representatives of Pyrostria group B. The placement of Canthium oligophlebium, Canthium obovatifolium and Canthium ramosii within Pyrostria s.s. (PP = 0.99; BS = 85%) is robustly supported likewise the affiliation of C. gynochthodes with Psydrax (PP = 0.94; BS = 85%). Morphological features shared by our species with Pyrostria s.s. and Psydrax further supports our molecular data. Our study supports the earlier hypothesis that Canthium oligophlebium, C. obovatifolium and C. ramosii s...Continue Reading

References

Nov 1, 1991·Plant Molecular Biology·P TaberletJ Bouvet
Aug 29, 2001·Bioinformatics·J P Huelsenbeck, F Ronquist
Aug 13, 2003·Bioinformatics·Fredrik Ronquist, John P Huelsenbeck
Feb 13, 2004·Bioinformatics·Gautam AltekarFredrik Ronquist
Mar 1, 2005·American Journal of Botany·Grecebio D AlejandroSigrid Liede-Schumann

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BETA
AJ617749
AJ620120
AJ617758
AJ620132
AJ617759
AJ620133
AJ617755
AJ620129
AJ874943
AJ874982

Software Mentioned

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Al
Codon Code Aligner
PAUP
MrBayes

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