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Abstract Detail


Systematics Section

Shaw, Joey [1], Wen, Jun [2], Haberle, Rosemarie [3], Chin, Siew Wai [3], Potter, Daniel [3].

Phylogeny of 130 Prunus L. (Rosaceae) species using three cpDNA regions.

Prunus L. (Rosaceae), comprising roughly 200 species of trees and shrubs, includes several of the most economically important fruit and nut crop species of temperate regions, is distributed throughout the north temperate regions of the world. However, it also includes representatives in tropical regions of Asia and America. Species of Prunus exhibit a diversity of morphologies of vegetative and reproductive structures, some of which (e.g., inflorescence type) have been emphasized in previous classifications, while others (e.g., the position and morphology of the often striking glands present on the leaves) have received surprisingly little attention. Earlier workers divided the genus into five or six subgenera and seven to nine sections that are still largely recognized today. Several recent DNA sequence-based studies, all of which were based on fewer than about 25% of the species in the genus, have suggested that some of these infrageneric taxa are not monophyletic. Moreover, species delimitation throughout Prunus is notoriously poorly understood, and none of the aforementioned studies has included adequate representation of the Pygeum group, i.e., about 40 Old World species in section Mesopygeum (subgenus Laurocerasus). Furthermore, Maddenia has recently been shown to be nested within Prunus. While these recent molecular phylogenetic analyses have elucidated various aspects of Prunus systematics, many questions about the status of infrageneric taxa, character evolution, and historical biogeography across the genus remain unresolved. We have now accumulated sequence data from approximately 200 accessions of about 130 species and generated chloroplastic trnS-trnG-trnG, trnL-trnL-trnF, and trnH-psbA sequences. Here we present the most thoroughly sampled chloroplast DNA phylogeny of Prunus to date.


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1 - University of Tennessee, Chattanooga, Department of Biological and Environmental Sciences, 215 Holt Hall, Department 2653, 615 McCallie Avenue, Chattanooga, Tennessee, 37403, USA
2 - Smithsonian Institution, Department of Botany MRC 166, National Museum Of Natural History, Po Box 37012, Washington, DC, 20560-0166, USA
3 - University of California, Davis, Department of Plant Sciences, Mail Stop 2, One Shields Avenue, Davis, CA, 95616, USA
4 - University of California, Davis, Department of Plant Sciences, Mail Stop 2, One Shields Avenue, Davis, CA, 95616, USA

Keywords:
Prunus
Rosaceae
cpDNA
phylogeny.

Presentation Type: Oral Paper:Papers for BSA Sections
Session: 2
Location: Alpine C/Snowbird Center
Date: Monday, July 27th, 2009
Time: 9:15 AM
Number: 2006
Abstract ID:933


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