Schilling, Edward .
Systematic analysis of the Eupatorium mohrii complex (Asteraceae, Eupatorieae).
Data from morphology and DNA sequence analysis were used to investigate the relationships of Eupatorium mohrii and related species. Earlier hypotheses based primarily on morphology had suggested that the complex included a diploid, E. recurvans, and polyploid apomicts derived from hybridization of the diploid with E. rotundifolium to produce E. mohrii and E. anomalum. Data from the nuclear ITS region failed to show any involvement of E. rotundifolium in the complex, and instead suggested that material of E. recurvans and E. mohrii form a single species consisting of diploid and autopolyploid populations. Material previously included in E. anomalum has two different hybrid origins, derived from hybridization of E.mohrii with E. semiserratum and E. serotinum, respectively. Morphological data and geographic distributions suggest that these two combinations should be recognized as distinct species.
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1 - University Of Tennessee, Department Of Ecology & Evolutionary Biology, 569 Dabney Hall, KNOXVILLE, TN, 37996-1100, USA
Presentation Type: Oral Paper:Papers for Sections
Location: Franklin A/Hyatt
Date: Monday, July 9th, 2012
Time: 11:30 AM