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Abstract Detail



Genetics Section

Borja, Guadalupe [1], Doust, Andrew [2].

Population differentiation in Paysonia spp. (Brassicaceae) of the Central Basin, Tennessee.

The genus Paysonia (Brassicaceae) consists of eight species, five of which are in the Central Basin of Tennessee and northern Alabama. Species are morphologically distinct but phylogenetic analyses suggest that both incomplete lineage sorting and gene flow complicate the recovery of evolutionary relationships. Three species are federally listed as threatened or endangered, increasing the importance of understanding population genetic processes amongst populations. To investigate species relationships we have used both chloroplast and nuclear markers with multiple accessions from the different populations of each species, but find little phylogenetic resolution. We have also used multiple microsatellite markers to document gene flow between the populations of each species, and find patterns are likely due both to species differentiation as well as ecological and geographic separation. Our results indicate a complex blend of phyletic relationships and present day and historic gene flow in these species, but suggest that the two most endangered species are relatively isolated from gene flow.

Broader Impacts:


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1 - Oklahoma State University, Department of Botany, 301 Physical Science, Stillwater, OK, 74074, USA
2 - Oklahoma State University, Botany, Physical Sciences Room 301, Stillwater, OK, 74078, USA

Keywords:
Paysonia
Brassicaceae
population genetics
gene flow
speciation.

Presentation Type: Oral Paper:Papers for Sections
Session: 6
Location: Marlborough B/Riverside Hilton
Date: Monday, July 29th, 2013
Time: 9:00 AM
Number: 6002
Abstract ID:794
Candidate for Awards:None


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