| Abstract Detail
Systematics Section/ASPT Triplett, Jimmy [1], Jamison, Jesse [2]. The evolution of North American cane bamboos (Poaceae: Arundinaria) as revealed by nuclear and chloroplast DNA. The cane bamboos are an ecologically important but taxonomically difficult group of forest grasses in the Southeastern US. Recent phylogenetic research supported the recognition of three species and implicated hybridization as a source of taxonomic confusion. The studies also identified East Asian bamboos as the closest relatives of the cane bamboos, while highlighting divergent lineages for A. gigantea (the river cane clade) and A. appalachiana + A. tecta (the switch cane clade). The current study utilized DNA sequences from three nuclear genes and multiple chloroplast gene regions to investigate the origin and evolution of Arundinaria. Each of the nuclear gene trees confirmed hybridization among cane bamboos. Moreover, chloroplast DNA haplotypes revealed that hybridization has been bidirectional and, in combination with nuclear data, provided evidence of introgression and chloroplast capture. Consistent with previous studies, the new data failed to support the monophyly of Arundinaria; in contrast, analyses suggested a new hypothesis that river cane and switch cane lineages arose independently in East Asia. Broader Impacts:
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1 - Jacksonville State University, 700 Pelham Road North, Jacksonville, AL, 36265, USA
2 - Jacksonville State University, Biology, 700 Pelham Road North, Jacksonville, AL, 36265, USA
Keywords:
Poaceae
nuclear DNA
hybridization
Arundinaria.
Presentation Type: Oral Paper:Papers for Sections
Session: 48
Location: Elmwood/Riverside Hilton
Date: Wednesday, July 31st, 2013
Time: 4:30 PM
Number: 48012
Abstract ID:75
Candidate for Awards:None |
