Abstract Detail



Reticulate evolution and biogeography in ferns and lycophytes - a colloquium honoring Dr. David Barrington

Kinosian, Sylvia [1], Wolf, Paul [2].

Species boundaries and population structure in the pan-topical fern genus Ceratopteris (Pteridaceae).

Since the 1980s, the aquatic fern Ceratopteris richardii has been used as a model organism for genetic and developmental studies. Recently, a draft whole genome for the species was completed. While there has been a great deal of research done on C. richardii, our knowledge of the other species in the genus remains depauperate. Systematists have described the genus as having from one to over half a dozen species and varieties. Considerable morphological variation exists within described species as well as speculated hybridization between species. Due to its increasing use as a model system, a solid taxonomic and systematics understanding of the group is critical. In this study, we begin to unravel the complexity of the species relationships between the species of Ceratopteris. We used double digest restriction-site associated DNA sequencing on 60 samples, representing all currently recognized species, collected from herbarium specimens from around the world. The program ENTROPY (admixture estimation in a Bayesian framework) was used to determine existing populations and admixed taxa.


1 - Utah State University, Biology, 5305 Old Main Hill, Logan, Utah, 84322, USA
2 - Utah State University, Department Of Biology, 5305 Old Main Hill, Logan, UT, 84322, United States

Keywords:
population genetics
admixture
speciation
systematics.

Presentation Type: Colloquium Presentations
Number: 0007
Abstract ID:174
Candidate for Awards:Margaret Menzel Award,Edgar T. Wherry award,George R. Cooley Award


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