Abstract Detail

Systematics

Shults, Keegan [1], Neubig, Kurt [2], Abbott, Richard [3].

Phylogenetic studies in North American Sisyrinchium angustifolium species complex Keegan Shults, J. Richard Abbott, & Kurt M. Neubig.

The genus Sisyrinchium (Iridaceae) is widely distributed throughout the New World. In North America, there is great taxonomic complexity centered on the species Sisyrinchium angustifolium, a widespread and common species. However, close relatives (especially S. montanum and S. strictum) show considerable morphological intergradation with S. angustifolium, and there are currently few phylogenetic data that support species monophyly. In a previous phylogenetic study, S. angustifolium was found to be non-monophyletic. Because morphological data may not adequately clarify species circumscription in this group, we are using phylogenetic analysis of DNA data. DNA was extracted from tissues obtained from field collections and herbarium specimens of North American Sisyrinchium. PCRs were amplified and sequenced for the following plastid, mitochondrial and nuclear loci: rpoC1, rpoB, trnH-psbA, matK, trnQ-rps16, nad1-2/3, nad4-1/2, and ITS. These data were edited, combined and analyzed to develop phylogenetic hypotheses. Phylogenetic relationships within the Sisyrinchium angustifolium complex will be presented to clarify these longstanding issues of species circumscription within the complex.

1 - 303 Woodriver Drive, Desoto, IL, 62924, United States
2 - Southern Illinois University, Dept Of Plant Biology, 1125 Lincoln Dr., Life Science II, Room 420, Carbondale, IL, 62901, United States
3 - P O Box 299, St Louis, MO, 63166, United States

Keywords:
Sisyrinchium
Sisyrinchium angustifolium
Phylogenetics
species circumscription
species-level phylogenetic relationships.

Presentation Type: Poster
Session: P, Systematics
Location: Grand Ballroom - Exhibit Hall/Mayo Civic Center
Date: Monday, July 23rd, 2018
Time: 5:30 PM This poster will be presented at 5:30 pm. The Poster Session runs from 5:30 pm to 7:00 pm. Posters with odd poster numbers are presented at 5:30 pm, and posters with even poster numbers are presented at 6:15 pm.
Number: PSY001
Abstract ID:909
Candidate for Awards:None