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Abstract Detail


Wolfe, Andi [1], Blischak, Paul [2], Kubatko, Laura  [3].

Testing Adaptive Radiation Theory in Penstemon (Plantaginaceae).

Penstemon is the largest genus endemic to North America, consisting of nearly 300 species and more than 350 taxa. Morphological diversity within the genus is extensive. For example, plant habit ranges from very short mat forming species to robust herbaceous species nearly 3 m tall. Corolla size ranges from <10 mm to ca. 5 cm, and there is a considerable array of inflorescence architectures and vegetative morphologies. Many species of Penstemon are edaphic endemics, and more than half the genus is adapted to montane environments. Using fossils from related genera in Plantaginaceae, we estimated an origin for Penstemon towards the end of the Pliocene or at the beginning of the Pleistocene. We conducted a phylogenetic analysis of ca. 310 taxa from Penstemon and outgroup genera in the tribe Cheloneae using 42 targeted amplicons from single copy nuclear genes. We then conducted analyses to examine diversification rates and to assess morphological characters that may be associated with increased rates of diversification. Our results reveal patterns of diversification and morphological changes consistent with indicators for adaptive radiation.

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Related Links:
Wolfe Lab Penstemon Database
Wolfe Lab Homepage

1 - Ohio State University, Department Of Evolution, Ecology And Organismal Biology, 318 W. 12th Avenue, Columbus, OH, 43210, United States
2 - Ohio State University, 318 W 12th Avenue, Columbus, OH, 43210.0, United States
3 - The Ohio State University, Department of Statistics, Columbus, OH, 43210, USA

adaptive radiation
targeted amplicon sequencing
High-throughput sequencing.

Presentation Type: Oral Paper
Session: 30, Systematics II--Euasterids 1
Location: 113/Mayo Civic Center
Date: Tuesday, July 24th, 2018
Time: 4:00 PM
Number: 30008
Abstract ID:705
Candidate for Awards:None

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