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Abstract Detail



Molecular Ecology and Evolution

Mavrodiev, Evgeny [1], Chester, Michael [2], Visger, Clayton [3], Roseana, Rodriguez [4], Soltis, Pamela [1], Soltis, Douglas [5], Susanna, Alfonso [6], Suarez-Santiago, Victor [7].

On the parentage and multiple origins of an Old World allotetraploid Tragopogon castellanus Levier s.l. (Asteraceae), based on molecular data.

Tragopogon includes two classic examples of recently formed allopolyploid species in North America. Older Tragopogon allotetraploids from Eurasia offer ideal taxa for comparing the longer-term outcomes of allopolyploidy. Recently published time-calibrated phylogenetic analyses for Tragopogon indicate that an endemic of Northern Spain, allotetraploid T. castellanus Levier, may be ~ 500,000 to 1 million years in age. This provides an ideal comparison to the young polyploids from North America. To clarify the ancestry of T. castellanus, a phylogenetic analysis was conducted based on nuclear ITS, ETS, Adh, and four plastid loci (trnL intron, trnL-trnF and trnT-trnL spacers, and rpL16). Our results confirm that diploid T. crocifolius L. and diploid T. lamottei Rouy, are the parents of T. castellanus. Due to the taxonomic complexity of both T. castellanus and T. crocifolius, we broadly consider T. castellanus and from the molecular data identify at least two separate origins of the allotetraploid. Karyotypes for the diploid parents and the allotetraploid are also presented. Future work will include genomic and transcriptomic analyses to assess the genetic changes that occurred since the formation of T. castellanus.

Broader Impacts:


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1 - University of Florida, Florida Museum of Natural History, PO BOX 117800, Gainesville, FL, 32611-7800, USA
2 - University of Florida, Department of Biology, Gainesville, FL, 32605, USA
3 - University of Florida, Department of Biology, P.O. Box 118525, Gainesville, FL, 32611, USA
4 - University of Florida, Biology, Gainesville, FL, 32611, USA
5 - University of Florida, Biology and Florida Museum of Natural History, Gainesville, FL, 32605, USA
6 - Botanic Institute of Barcelona, Barcelona, Spain
7 - University of Granada, Department of Botany, Granada, Spain

Keywords:
allopolyploidy
recurrent formation
cryptic species
Tragopogon.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Grand Salon A - D/Riverside Hilton
Date: Monday, July 29th, 2013
Time: 5:30 PM
Number: PME004
Abstract ID:893
Candidate for Awards:None


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