Aliso: A Journal of Systematic and Evolutionary Botany Volume 22 | Issue 1 Article 36 2006 A Comparison and Combination of Plastid atpB and rbcL Gene Sequences for Inferring Phylogenetic Relationships within Orchidaceae Kenneth M. Cameron New York Botanical Garden Follow this and additional works at: http://scholarship.claremont.edu/aliso Part of the Botany Commons Recommended Citation Cameron, Kenneth M. (2006) "A Comparison and Combination of Plastid atpB and rbcL Gene Sequences for Inferring Phylogenetic Relationships within Orchidaceae," Aliso: A Journal of Systematic and Evolutionary Botany: Vol. 22: Iss. 1, Article 36. Available at: http://scholarship.claremont.edu/aliso/vol22/iss1/36 MONOCOTS Comparative Biology and Evolution Excluding Poales Aliso 22, pp. 447-464 © 2006, Rancho Santa Ana Botanic Garden A COMPARISON AND COMBINATION OF PLASTID atpB AND rbcL GENE SEQUENCES FOR INFERRING PHYLOGENETIC RELATIONSHIPS WITHIN ORCHIDACEAE KENNETH M. CAMERON The Lewis B. and Dorothy Cullman Program for Molecular Systematics Studies, The New York Botanical Garden, Bronx, New York 10458-5126, USA (
[email protected]) ABSTRACT Parsimony analyses of DNA sequences from the plastid genes atpB and rbcL were completed for 173 species of Orchidaceae (representing 150 different genera) and nine genera from outgroup families in Asparagales. The atpB tree topology is similar to the rbcL tree, although the atpB data contain less homoplasy and provide greater jackknife support than rbcL alone. In combination, the two-gene tree recovers five monophyletic clades corresponding to subfamilies within Orchidaceae, and fully resolves them with moderate to high jackknife support as follows: Epidendroideae are sister to Orchidoideae, followed by Cypripedioideae, then Vanilloideae, and with Apostasioideae sister to the entire family.