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Abstract Detail


Population Genetics

Koopman, Margaret M. [1], Carstens, Bryan [1].

Using model selection to infer population structure across a riverine barrier in the carnivorous pitcher plant Sarracenia alata (Sarraceniaceae).

The phylogeny and mechanism of speciation of the recently and rapidly evolving carnivorous plant genus Sarracenia remain largely unknown. Presumably a great number of complex historical and biological processes have contributed to the evolution of this unique genus. Here we aim to identify the best model of population demographic history in order to understand the combination of historical processes that have contributed to the evolution of Sarracenia alata in Louisiana. One intriguing clue is provided by the disjunct distribution of the species, which occurs on either side of the Mississippi River. Could diversification in S. alata be promoted by the isolation of populations on opposite sides of the river and subsequent population divergence? We collected genetic data from the trnK-rps16 region of the chloroplast and nine microsatellite loci, and used these data to evaluate competing models of demographic history. These data represent an important foundation to understanding the processes that promote speciation in North American pitcher plants.


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1 - Louisiana State University, Biological Sciences, 202 Life Sciences Building, Baton Rouge, LA, 70808, USA

Keywords:
Sarracenia
Sarraceniaceae
population structure
model selection.

Presentation Type: Oral Paper:Papers for Topics
Session: 40
Location: Cottonwood D/Snowbird Center
Date: Tuesday, July 28th, 2009
Time: 10:30 AM
Number: 40005
Abstract ID:509


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