HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (8) Citing Articles via Google Scholar Google Scholar Articles by Shaw, J. Articles by Small, R. L. Search for Related Content PubMed Articles by Shaw, J. Articles by Small, R. L. Agricola Articles by Shaw, J. Articles by Small, R. L.

Chloroplast DNA phylogeny and phylogeography of the North American plums (Prunus subgenus Prunus section Prunocerasus, Rosaceae)¹

²Department of Ecology and Evolutionary Biology, 569 Dabney Hall, The University of Tennessee, Knoxville, Tennessee 37996 USA; ³Department of Biological and Environmental Sciences, 615 McCallie Avenue, The University of Tennessee, Chattanooga, Tennessee 37403 USA

ABSTRACT

The North American plums are a closely related group that are not easily circumscribed, have overlapping morphologies, and are known to hybridize. We previously showed that the North American plums are a closely related, monophyletic group of taxa with little to no cpDNA sequence divergence between taxa. In that study, we came to the unanticipated conclusion that relationships inferred among the taxa contrast sharply with previously defined groups based on morphological characters. Here the aim was to determine if the primary cpDNA haplotypes identified in our earlier study are confined to the taxa in which they were initially observed. The cpDNA rpL16 intron was sequenced for 207 accessions of the 17 North American plum taxa plus Prunus texana. The results show that many taxa contain more than one of the three primary cpDNA haplotypes. Aside from the results found in sect. Prunocerasus, this study has broader implications for phylogenetics in general. The common practice of choosing a single exemplar to represent a taxon can be profoundly misleading in closely related groups. In hindsight, the possibility existed in our earlier study that we could have chosen a different combination of exemplars, which could have resulted in a different inferred phylogeny.

Key Words: cpDNA • hybrid • phylogeny • phylogeography • plum • Prunocerasus • Prunus • Rosaceae

This article has been cited by other articles:

				J. Syring, K. Farrell, R. Businsky, R. Cronn, and A. Liston Widespread Genealogical Nonmonophyly in Species of Pinus Subgenus Strobus Syst Biol, April 1, 2007; 56(2): 163 - 181. [Abstract] [Full Text] [PDF]

				J. Shaw, E. B. Lickey, E. E. Schilling, and R. L. Small Comparison of whole chloroplast genome sequences to choose noncoding regions for phylogenetic studies in angiosperms: the tortoise and the hare III Am. J. Botany, March 1, 2007; 94(3): 275 - 288. [Abstract] [Full Text] [PDF]