Becker, Anna , Small, Randall .
Population genetic of Penstemon tenuiflorus and P. hirsutus (Plantaginaceae).
Penstemon tenuiflorus and P. hirsutus (Plantaginaceae) are morphologically similar species of eastern North America, and their taxonomic status as separate species has been a matter of debate. Penstemon tenuiflorus has a narrow distribution largely localized to cedar glades in Tennessee, Alabama and Mississippi. Penstemon hirsutus is more widely distributed, with a range that extends from Kentucky to southeastern Canada. While these speciesí ranges overlap in southern Kentucky and northern Tennessee, they have never been observed growing together or hybridizing in nature. Sequences of nuclear genes and non-coding chloroplast DNA as well as microsatellite analyses are being used to assess genetic variation within and between species, to place them in a phylogenetic context of other Penstemon species, and to assess the possibility of gene flow between species. Preliminary data from one population of each species indicate that genetic variation exists within each species, and that they are closely related, but genetically differentiated from each other.
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1 - University of Tennessee, Ecology and Evolutionary Biology, 442 Hesler Biology Building, Knoxville, TN, 37996, USA
2 - University of Tennessee, Department of Ecology and Evolutionary Biology, 442 Hesler Biology, Knoxville, Tennesee, 37996, USA
Presentation Type: Oral Paper:Papers for BSA Sections
Location: Cottonwood D/Snowbird Center
Date: Tuesday, July 28th, 2009
Time: 5:15 PM