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Abstract Detail



Systematics Section/ASPT

Carter, Benjamin E [1], Guilliams, Matt [2], Chen, Po-An [3], Li, Gary [3].

Diversification and biogeography of Ribes section Calobotrya (Grossulariaceae).

Ribes (the currants and gooseberries) is a diverse genus of shrubs with ca. 200 species worldwide and centers of diversity in east Asia, western North America and the Andes mountains. As part of a larger ongoing project aimed at clarifying biogeography as well as current and ancient diversification in the genus, we present preliminary results from a western North American section, Calobotrya, a morphologically well-defined clade strongly supported by molecular data. Our current phylogenetic hypothesis based on ITS, ETS and psbA-trnH indicates that the section comprises two lineages that diverged before the onset of the Mediterranean climate in California; each of the two lineages has subsequently diversified into climatically different regions. The current analysis employs two fossil calibration points, and we discuss ongoing efforts employing morphometric data from extant and fossil specimens to further exploit the rich fossil history of Ribes in developing a more precise understanding of the biogeography of section Calobotrya and Ribes as a whole.

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1 - Duke University, Department of Biology, Box 90338, 137 Biological Sciences Building, 130 Science Drive, Durham, NC, 27708, USA
2 - 3016 Andrade Ave., Richmond, CA, 94804, USA
3 - University of California, Berkeley, Department of Integrated Biology, 1001 Valley Life Sciences Building, Berkeley, CA, 94720, USA

Keywords:
fossil calibration
Currants
speciation
North America
Phylogenetics.

Presentation Type: Oral Paper:Papers for Sections
Session: 37
Location: Belle-Chasse/Riverside Hilton
Date: Wednesday, July 31st, 2013
Time: 10:15 AM
Number: 37007
Abstract ID:544
Candidate for Awards:None


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