Ruiz-Sanchez, Eduardo , Sosa, Victoria , Mejia-Saules, Teresa .
New insights into the phylogeny and taxonomy of the Mesoamerican bamboo genera Olmeca-Otatea (Poaceae: Bambusoideae:Bambuseae).
A synthesis of the most recent molecular and morphological phylogenetic studies in the monophyleticsister bamboo genera Olmeca and Otatea is here presented. A new species in Olmeca and four new species in Otatea have been recently described. The molecular phylogenetic analysis based in nuclear and plastid DNA regions retrieved unresolved trees at species level in both genera, contrary to the morphological phylogenetic analysis. These bamboos are found in habitats from tropical dry forests to tropical rainforests and cloud forests with two kinds of fruits (fleshy and dry caryopsis). The molecular dating reveals an age of 4.3 Ma for the most common ancestor of these genera and the ancestral area reconstruction indicates a Mesoamerican origin with dispersal to South America.Molecular and morphological phylogenetic analyses retrieved trees with conflicting topologies. These conflicts could be explained due to incomplete lineage sorting with retention of ancestral polymorphism correlated to the recent origin of these Mesoamerican bamboos. The results of phylogenetic analyses of Olmecaand Otatea and taxa in the subtribe Guaduinae resulted in a new classfication of the group.
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1 - Unvirsity of California, Berkeley, Plant and Microbial Biology, 431 Koshland Hall, Berkeley, California, 94720, USA
2 - INSTITUTO DE ECOLOGIA A.C., APDO POSTAL 63, XALAPA, Veracruz, N/A, 91000, Mexico
3 - Instituto de Ecologia AC, Biologia Evolutiva, Apartado Postal 63, Xalapa, Veracruz, 91000, Mexico
Presentation Type: Oral Paper:Papers for Sections
Location: Lindell A/Chase Park Plaza
Date: Wednesday, July 13th, 2011
Time: 9:30 AM