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Abstract Detail


Systematics Section / ASPT

Mavrodiev, Evgeny V. [1], Soltis, Pamela S. [2], Soltis, Douglas E. [3].

Insights into the parentage of Eurasian tetraploids in the genus Tragopogon L. based on low-copy nuclear genes, ITS/ETS, and plastid sequence data.

Tragopogon L. (Lactuceae, Cichorioideae, Scorzonerinae) is an Old World genus of approximately 150 species that occurs across Eurasia with a center of distribution in the Mediterranean region, the Middle East, and eastern Europe. The chromosome number reported for most known species of Tragopogon is 2n = 12 but there are also several polyploids native to Eurasia. However, until recently, there have been few investigations of the parentage of these polyploids. We investigated six Eurasian polyploids (Tragopogon buphthalmoides, T. castellanus, T. coloratus, T. gracilis, T. latifolius, and T. tuberosus) using ITS and ETS sequence data. We showed that most of these Eurasian polyploids combine different ribosomal types and therefore appear to be allopolyploids; we propose putative parents for each. We have also generated the first phylogenys for LFY, ADH, and G3PDH for Tragopogon. To provide additional insights into the origin of the Eurasian polyploids we discuss the parentage of T. buphthalmoides (2n = 24, 36), T. castellanus (2n = 24), and T. cupani (2n = 12, 24) in the context of our current LFY, ADH, G3PDH and plastid gene data.


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1 - University of Florida, Department of Botany, Florida Museum of Natural History, P.O. Box 117800, Gainesville, Florida, 32611-7800, USA
2 - University of Florida, Florida Museum of Natural History, PO Box 117800, Gainesville, FL, 32611-7800, USA
3 - University of Florida, Department of Botany, 220 Bartram Hall, P.O. Box 118526, Gainesville, Florida, 32611-8526, USA

Keywords:
Tragopogon L.
Asteraceae
polyploidy
LFY, ADH, G3PDH, rDNA
plastid sequence data.

Presentation Type: Oral Paper:Papers for Sections
Session: CP54
Location: International Ballroom South/Hilton
Date: Wednesday, July 11th, 2007
Time: 3:45 PM
Number: CP54010
Abstract ID:1917


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