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Abstract Detail


Systematics Section

Sass, Chodon [1], Specht, Chelsea [2].

Multi-gene molecular phylogeny of Aechmea and allied Bromelioideae genera (Bromeliaceae).

Members of subfamily Bromelioideae (Bromeliaceae) have successfully radiated into a wide array of tropical and subtropical biomes. Recent molecular and morphological analyses of relationships within the subfamily Bromelioideae (Bromeliaceae) corroborate historical taxonomic challenges, especially in Aechmea, the most species rich genus of the subfamily. Because of apparent homoplasy in morphological characters, particularly in those characters that are adaptations to the many extreme environments into which the Bromelioideae have radiated, a well resolved and deeply sampled molecular phylogenetic estimation will offer a powerful platform from which to reinvestigate possible morphological synapomorphies, and to understand the evolutionary context for adaptations enabling success in diverse biomes. I will present data on a molecular phylogenetic reconstruction using 4 gene regions with a focus on the genus Aechmea (s.l.) endemic to Central America, northern South America and the Carribbean, but incorporating species of 19 other Bromelioideae genera. Extensive species level and genomic sampling are improvements to previous work. Individual and combined gene-region phylogenies built using low-copy nuclear gene regions, nuclear ribosomal spacers and chloroplast gene regions will be discussed in relation to previously published morphological affinities. The utility and methods for amplifying each gene region will be presented, in order that these regions might be incorporated in future phylogenetic studies in the Bromeliaceae. The biogeography, ancestral ecology and shared adaptive traits of a clade of 9 species that seem to have radiated in situ within Central America will also be explored.


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1 - University of California, Berkeley, Plant and Microbial Biology, 111 Koshland Hall MC3102, Berkeley, CA, 94720, USA
2 - University of California, Berkeley, Plant and Microbial Biology, 111 Koshland Hall MC 3102, Berkeley, CA, 94720, United States

Keywords:
low copy nuclear markers
Bromelioideae.

Presentation Type: Oral Paper:Papers for BSA Sections
Session: 68
Location: Cottonwood D/Snowbird Center
Date: Wednesday, July 29th, 2009
Time: 1:30 PM
Number: 68003
Abstract ID:282


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