Systematics/Phytogeography / Taxonomie/ Section
Sass, Chodon , Specht, Chelsea .
Phylogenetic estimation of Central American Aechmea (Bromeliaceae) using low-copy nuclear and chloroplast gene regions.
Despite hundreds of years of wild collecting and floral descriptions, genera in subfamily Bromelioideae (Bromeliaceae) have not been delineated into monophyletic groups. Recent molecular analyses of relationships within the subfamily corroborate historical taxonomic challenges, suggesting polyphyletic assemblages of genera. I will present data on a recent molecular phylogenetic reconstruction of genera within the Bromelioideae with a focus on the genus Aechmea (s.l.) native to Central America, Mexico, northern South America and the Caribbean Islands. The phylogeny was constructed in order to understand the migration and diversification of these tropical epiphytes northward, and the diversification of an endemic Central American clade. Additional species level and genomic sampling are improvements to previous work. Phylogenies built using both low-copy nuclear gene regions and chloroplast gene regions will be compared and the multi-gene combined analyses will be discussed. The biogeography and shared adaptive traits of species within a clade that appears to have diversified in situ within Central America will also be explored.
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Specht Lab web site
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, California, 94720-3102, USA
Low-copy Nuclear Markers
Presentation Type: Oral Paper:Papers for Sections
Date: Tuesday, July 29th, 2008
Time: 8:45 AM