TY - JOUR
T1 - Evolution of Mexican Bursera (Burseraceae) inferred from ITS, ETS, and 5S nuclear ribosomal DNA sequences
AU - Becerra, Judith X.
N1 - Funding Information:
I thank J. L. Leon de la Luz, J. Rzedowski, B. Vrskovy and J. Eslamieh for plant samples. J. L. Leon de la Luz also helped me find and identify burseras from Baja California. D. Pinero facilitated the logistics of plant collection in Central Mexico, and D. L. Venable assisted me in the collection of Mexican and African samples. The personnel from the Genomic Analysis and Technology Core of the U. of Arizona were very helpful with sequencing techniques. This work was supported by NSF (DEB-9910118) and written while a Sabbatical Fellow at the National Center for Ecological Analysis and Synthesis, a Center funded by NSF (DEB-0072909), the University of California, and the Santa Barbara campus.
PY - 2003/2/1
Y1 - 2003/2/1
N2 - I reconstructed a phylogeny of 66 species and varieties of Bursera and 9 outgroup species using sequences of the internal transcribed spacer region (ITS), the 5S non-transcribed region (5S-NTS), and the external transcribed region (ETS) of nuclear ribosomal DNA. This study extends a previously proposed parsimony-based phylogenetic study that used the ITS sequences of 57 Bursera species and five outgroups. Parsimony and maximum likelihood methods were used to infer the phylogeny in this new study. Analyses of the combined data sets largely confirmed the phylogenetic relationships proposed by the previous molecular study but generated a considerably more robust topology. The new phylogenies corroborate the monophyly of the genus, and its division into the two monophyletic subgenera or sections, Bursera and Bullockia. The current analyses also identify four main groups of species in section Bursera, and two in section Bullockia, confirming some of the previously proposed groups based on fruit, flower, and leaf morphology. One previously problematic species B. sarcopoda, which has sometimes been placed in Commiphora, is shown to belong in Bursera. Another controversial species, Commiphora leptophloeos, which was thought to belong to Bursera, falls within Commiphora.
AB - I reconstructed a phylogeny of 66 species and varieties of Bursera and 9 outgroup species using sequences of the internal transcribed spacer region (ITS), the 5S non-transcribed region (5S-NTS), and the external transcribed region (ETS) of nuclear ribosomal DNA. This study extends a previously proposed parsimony-based phylogenetic study that used the ITS sequences of 57 Bursera species and five outgroups. Parsimony and maximum likelihood methods were used to infer the phylogeny in this new study. Analyses of the combined data sets largely confirmed the phylogenetic relationships proposed by the previous molecular study but generated a considerably more robust topology. The new phylogenies corroborate the monophyly of the genus, and its division into the two monophyletic subgenera or sections, Bursera and Bullockia. The current analyses also identify four main groups of species in section Bursera, and two in section Bullockia, confirming some of the previously proposed groups based on fruit, flower, and leaf morphology. One previously problematic species B. sarcopoda, which has sometimes been placed in Commiphora, is shown to belong in Bursera. Another controversial species, Commiphora leptophloeos, which was thought to belong to Bursera, falls within Commiphora.
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U2 - 10.1016/S1055-7903(02)00256-7
DO - 10.1016/S1055-7903(02)00256-7
M3 - Article
C2 - 12565038
AN - SCOPUS:0037331905
SN - 1055-7903
VL - 26
SP - 300
EP - 309
JO - Molecular Phylogenetics and Evolution
JF - Molecular Phylogenetics and Evolution
IS - 2
ER -