| Abstract Detail
Pteridology Jorgensen, Stacy A [1], Barker, Michael S [2]. Evolutionary history and population genomics of the allotetraploid lycophyte Selaginella rupincola. Selaginella is a lineage of vascular land plants comprising ca. 700-800 species and is characterized by obligate heterospory, a dominant and complex sporophyte stage, and a lignified vascular system. This lycophyte group originated approximately 400 MYA, and is an emerging model system integral to understanding the evolutionary history of land plants. Selaginella rupincola is a native of the Madrean Sky Islands of the southwestern United States and the Sierra Madre of Mexico. It is an allotetraploid (n=20), with a much broader range than is hypothesized progenitors. Among its xeric-adapted features is a resurrection phenotype associated with a radiation of Selaginella species in arid western North America. Here, we use a combination of approaches to investigate the hybrid history and population genetics of S. rupincola. Previously published Sanger sequence data and newly generated transcriptome data provide insights into the parentage of this allopolyploid. Double digest restriction-associated DNA sequence (ddRADseq) data are used to sample S. rupincola genomes at the population level. In our pilot study, we sampled five Sky Island populations in order to estimate population parameters at a genomic scale. Moving forward, we hope to improve spatial sampling of S. rupincola throughout its range, and to sample the genomes of the hypothesized progenitors. Log in to add this item to your schedule
Related Links: Barker Lab website
1 - University of Arizona, Ecology & Evolutionary Biology, 1041 E Lowell St, PO Box 210088, Tucson, AZ, 85721, USA 2 - University Of Arizona, Department Of Ecology & Evolutionary Biology, P.O. Box 210088, Tucson, AZ, 85721, USA
Keywords: genome evolution polyploidy Lycophyte RADseq.
Presentation Type: Oral Paper Session: 7, Pteridological Section/AFS Location: 203/Savannah International Trade and Convention Center Date: Monday, August 1st, 2016 Time: 10:15 AM Number: 7008 Abstract ID:670 Candidate for Awards:None |