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Abstract Detail


Systematics Section

Triplett, Jimmy [1], Clark, Lynn [2], Wen, Jun [3], Peterson, Paul [4].

Polyploid speciation on a grand scale: the evolution of the temperate bamboos.

The temperate bamboos encompass 500+ species in Asia, Africa, and North America and are among the most problematic plants from a taxonomic perspective. Recent molecular evidence suggested that the temperate bamboos provide a large-scale example of speciation at the polyploid level. In the current investigation, low-copy nuclear genes (including an endo-1,4-β glucanase and a poly-A binding protein) were used to reconstruct phylogenetic relationships within the woody bamboos in order to examine the origin of polyploidy in the temperate clade. These data suggest that all 500+ species of temperate bamboos are descended from a single allotetraploid ancestor that was derived from two divergent parents. Subsequent diversification has produced species that are genetically, morphologically, and ecologically distinct, yet retain both parental genomes. Moreover, new species have been produced by ongoing hybridization at the tetraploid level. This new evidence, combined with previous studies using chloroplast DNA and AFLP data, reveal that hybridization and polyploidy have had important and recurrent roles in the evolution of the temperate bamboos.

Broader Impacts:


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1 - Jacksonville State University, 700 Pelham Road North, Jacksonville, AL, 36265, USA
2 - Iowa State University, Department of Ecology, Evolution and Organismal Biology, 253 Bessey, Ames, IA, 50011-1020, USA
3 - Smithsonian Institution, Botany, MRC-166 National Museum Of Natural History, 10th St. & Constitution Ave., NW, MRC 166, Washington/DC, N/A, 20013-7012, USA
4 - Smithsonian Institution, Botany, MRC-166 National Museum Of Natural History, PO Box 37012, WASHINGTON, DC, 20013-7012, USA

Keywords:
single copy nuclear gene
Phylogeny
Polyploidy
hybridization.

Presentation Type: Oral Paper:Papers for Sections
Session: 44
Location: Lindell A/Chase Park Plaza
Date: Wednesday, July 13th, 2011
Time: 9:00 AM
Number: 44003
Abstract ID:405


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