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Abstract Detail



Systematics Section/ASPT

Willyard, Ann [1].

Phylogeography of ponderosa pine based on the integration of several distinct data types.

Contributions from two major factors - incomplete lineage sorting and an unknown level of introgression via secondary contact between highly diverged lineages – have obscured phylogeographic hypotheses in the ponderosa pine species complex. Ineffective communication between Mexican and U.S. botanists, along with an inaccurate perception that forest geneticists have settled these species delimitations also delayed resolution. Happily, several factors provide data for ponderosa pine that is uncommon in most wild plant species groups. First, the inheritance of plastids from the pollen parent gives an independent view of gene flow from that provided by the maternal mitochondrial lineages. Second, because of their economic importance, comparative growth data is available from several long-standing progeny test programs. This allows us to build a data set with nuclear, plastid, mitochondrial, species distribution model, morphological, and growth data. Although our sampling of individuals and data types varies, some of our data spans the entire geographic range of the roughly 17 species in Pinus subgenus Pinus section Trifoliae subsection Ponderosae from western Canada to Nicaragua. We are using new ideas for how to normalize these disparate data types so that a unified view can be gained by integrative data analysis.


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1 - Hendrix College, Biology Dept, 1600 Washington Ave, Conway, AR, 72032, USA

Keywords:
Phylogeography
pinus.

Presentation Type: Oral Paper:Papers for Sections
Session: 33
Location: Salon 10/The Shaw Conference Centre
Date: Tuesday, July 28th, 2015
Time: 10:15 AM
Number: 33009
Abstract ID:374
Candidate for Awards:None


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