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Abstract Detail


DiNicola, Alexa [1], Ertter, Barbara [2], Sytsma, Kenneth [3].

Evolution of the Potentilla breweri complex: hybridization and radiation in the Great Basin sky islands.

In complex, taxonomically difficult systems, different lines of inquiry frequently give disparate results. The Potentilla breweri complex (Rosaceae), a morphologically and biogeographically coherent group of ca. five species from the Sierra Nevada, Great Basin, and Pacific Northwest, is a perennial example: molecular and morphological evidence suggest very different taxonomies, insofar as molecular phylogenies can be resolved at all, and neither coincides entirely with leading hypotheses about the group's morphology, biogeography, and breeding systems. My research interweaves multiple approaches -- molecular phylogenetics, historical biogeography, population genetics, modern morphometrics, chromosomal evolution, and niche evolution -- to develop a comprehensive perspective on a complex system. I am developing a molecular phylogenetic network based on multiple genes and NGS data from anchored hybrid enrichment, reconstructing the complex's historical biogeography and projecting its future range, examining its small-scale population genetics and its patterns of chromosomal evolution, quantifying its range of variation in morphospace, and using common-garden experiments to quantify the relative phenotypic contributions of adaptation and plasticity. In light of ongoing climate change, which impacts montane species disproportionately, the resulting insights could be key to preserving these species.

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1 - University of Wisconsin-Madison, Department of Botany, 132 Birge Hall, 430 Lincoln Dr., Madison, WI, 53706, United States
2 - The College of Idaho, Harold M. Tucker Herbarium, Caldwell, ID, 83605, USA
3 - University Of Wisconsin, Department Of Botany, Birge Hall, 430 Lincoln Drive, Madison, WI, 53706, United States

Sky islands
Next Generation Sequencing
North America
molecular phylogenetics
common gardens

Presentation Type: Oral Paper
Session: SYS2, Systematics II: Rosids part 1 to Asterids part 1
Location: Tucson G/Starr Pass
Date: Wednesday, July 31st, 2019
Time: 9:15 AM
Number: SYS2006
Abstract ID:990
Candidate for Awards:None

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