Systematics Section / ASPT
Clevinger, Jennifer A. , Clevinger, Curtis C. .
Phylogenetic Analysis of Berlandiera (Asteraceae: Heliantheae) based on ITS and ETS Sequence Data.
Berlandiera, commonly known as green-eyes, belongs to the sunflower family (Asteraceae) and is found throughout the southern United States and northern Mexico. Currently eight species, including three hybrids, are recognized by Donald Pinkava in the Flora of North America treatment. The relationships of these eight species were examined using DNA sequence data from the internal transcribed spacer (ITS) region and the external transcribed spacer (ETS) region. Of particular interest is Berlandiera pumila, which is a disjunct found in the southeastern and the southwestern United States. The southeastern populations overlap with B. subcaulis and produce a hybrid called B. x humilis. The southwestern populations of B. pumila overlap with B. texana and produce a hybrid called B. x betonicifolia. Preliminary phylogenetic analysis suggests that the disjunct populations of B. pumila form a monophyletic group with B. subcaulis and B. x humilis. Analysis also indicates that the southwestern species B. lyrata is basal to the other members of the genus.
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1 - Walsh University, Math and Science, 2020 East Maple Street NW, North Canton, Ohio, 44720, U.S.A.
2 - Kent State University, Department of Biological Sciences, Kent, Ohio, 44242, U.S.A.
Presentation Type: Poster:Posters for Sections
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM