It is not a disaster: molecular and morphologically based phylogenetic analysis of Rondeletieae and the Rondeletia complex (Cinchonoideae, Rubiaceae)
Por:
Torres-Montufar, Alejandro, Borsch, Thomas, Fuentes, Susy, Gutierrez, Jorge, Ochoterena, Helga
Publicada:
1 ene 2020
Resumen:
The circumscription of Rondeletieae has changed considerably over time. Historically, 85 genera have been included, characterized by small trees, imbricate corolla aestivation and capsules. Molecular studies led to a narrower circumscription and stressed out that Rondeletieae is mainly an Antillean clade. As historically circumscribed, Rondeletieae is both polyphyletic (involving several tribes, including Condamineae, Sipaneeae, etc.) and paraphyletic with respect to Guettardeae. Uncertainties persist on the tribal circumscription, and its generic limits and relationships. We report results of phylogenetic analyses under parsimony, maximum likelihood and Bayesian analyses including 179 taxa, using concatenated datasets of three chloroplast DNA regions (petD, trnL–F and trnK–matK), their DNA microstructural characters as well as morphology. Our objectives are to: test the monophyly of Rondeletieae and evaluate phylogenetic relationships, evaluate potential characters for tribal and generic delimitation and propose a circumscription for Rondeletieae according to phylogenetic hypothesis using morphological characters. The tribes Guettardeae and Rondeletieae are strongly supported as sister: quincuncial aestivation and spathulate corolla lobes are proposed as a unique combination of characters supporting this relationship. We did not find synapomorphies for each tribe, but there is a set of character combinations that allows distinguishing both tribes that includes the corolla and pollen ornamentation as well as fruit and seed morphology. After evaluating other genera not included in the phylogenies, our proposal is that Rondeletieae contains approximately 120 species in 20 neotropical genera: Acrosynanthus, Acunaeanthus, Blepharidium, Donnellyanthus, Mazaea, Phyllomelia, Rachicallis, Roigella, Rondeletia, Rovaeanthus, Suberanthus, Tainus, plus one tentatively included and recently described (Jamaicanthus). © 2020, Springer-Verlag GmbH Austria, part of Springer Nature.
Filiaciones:
Torres-Montufar, Alejandro:
Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Ciudad Universitaria AP 70-367, Coyoacán, CdMx 04510, Mexico
Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad Universitaria AP 70-367, Coyoacán, CdMx 04510, Mexico
Univ Nacl Autonoma Mexico, Posgrad Ciencias Biol, Ciudad Univ AP 70-367, Mexico City 04510, DF, Mexico
Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Ciudad Univ AP 70-367, Mexico City 04510, DF, Mexico
Borsch, Thomas:
Botanischer Garten und Botanisches Museum Berlin, Freie Universität Berlin, Königin-Luise-Straße 6-8, Berlin, 14195, Germany
Free Univ Berlin, Bot Garten & Bot Museum Berlin, Konigin Luise Str 6-8, D-14195 Berlin, Germany
Fuentes, Susy:
Botanischer Garten und Botanisches Museum Berlin, Freie Universität Berlin, Königin-Luise-Straße 6-8, Berlin, 14195, Germany
Free Univ Berlin, Bot Garten & Bot Museum Berlin, Konigin Luise Str 6-8, D-14195 Berlin, Germany
Gutierrez, Jorge:
Jardín Botánico Nacional, Universidad de la Habana, Carretera del Rocío Km 3½, Calabazar, Ciudad de la Habana, 19230, Cuba
Univ La Habana, Jardin Bot Nacl, Carretera Rocio Km 3 1-2, Havana 19230, Cuba
Ochoterena, Helga:
Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad Universitaria AP 70-367, Coyoacán, CdMx 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Ciudad Univ AP 70-367, Mexico City 04510, DF, Mexico
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