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Abstract Detail


Systematics Section

Wolfe, Andrea D. [1], Small, Randall [2].

New insights on hybrid speciation in Penstemon (Plantaginaceae).

In 1955, Richard M. Straw proposed a diploid hybrid species of Penstemon, P. spectabilis, based on floral and ethological isolating factors. This species was a paradigm for diploid hybrid speciation for several decades. A series of studies employing molecular data revealed that P. spectabilis was not a hybrid species, but another related species in the hybrid complex, P. clevelandii, was likely derived through hybridization. In this study we used eight microsatellite loci in combination with allelic variation from low-copy nuclear genes to re-examine the previous hypotheses on the origin of P. clevelandii. Microsatellites and low-copy nuclear genes show species-specific allelic patterns that support P. clevelandii as a diploid hybrid species and elucidate hybridization amongst species in Straws hybrid complex.


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1 - Ohio State University, Department of Evolution, Ecology and Organismal Biology, 300 Aronoff Laboratory, 318 W. 12th Ave., Columbus, Ohio, 43210-1293, USA
2 - University of Tennessee, Department of Ecology and Evolutionary Biology, 437 Hesler Biology Building, 1406 Circle Drive, Knoxville, Tennessee, 37996-1100, USA

Keywords:
Penstemon
Plantaginaceae
hybridization
hybrid speciation
diploid hybrid.

Presentation Type: Oral Paper:Papers for BSA Sections
Session: 46
Location: Cottonwood D/Snowbird Center
Date: Tuesday, July 28th, 2009
Time: 3:00 PM
Number: 46008
Abstract ID:666


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