Abstract
Previous molecular phylogenetic analyses have revealed that elements of the former families Malvaceae sensu stricto and Bombacaceae together form a well-supported clade that has been named Malvatheca. Within Malvatheca, two major lineages have been observed; one, Bombacoideae, corresponds approximately to the palmate-leaved Bombacaceae, and the other, Malvoideae, includes the traditional Malvaceae (the mallows or Eumalvoideae). However, the composition of these two groups and their relationships to other elements of Malvatheca remain a source of uncertainty. Sequence data from two plastid regions, ndhF and trnK/matK, from 34 exemplars of Malvatheca and six outgroups were analyzed. Parsimony, likelihood, and Bayesian analyses of the sequence data provided a well-resolved phylogeny except that relationships among five lineages at the base of Malvatheca are poorly resolved. Nonetheless, a 6-bp insertion in matK suggests that Fremontodendreae is sister to the remainder of Malvatheca. Our results suggest that the Malvoideae originated in the Neotropics and that a mangrove taxon dispersed across the Pacific from South America to Australasia and later radiated out of Australasia to give rise to the ca. 1700 living species of Eumalvoideae. Local clock analyses imply that the plastid genome underwent accelerated molecular evolution coincident with the dispersal out of the Americas and again with the radiation into the three major clades of Eumalvoideae.
| Original language | English |
|---|---|
| Pages (from-to) | 1863-1871 |
| Number of pages | 9 |
| Journal | American Journal of Botany |
| Volume | 91 |
| Issue number | 11 |
| DOIs | |
| State | Published - Nov 1 2004 |
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Keywords
- Biogeography
- Bombacaceae
- Eumalvoideae
- Local clock analysis
- Malvatheca
- matK
- ndhF
- Phylogenetic nomenclature
ASJC Scopus subject areas
- Plant Science
Cite this
Phylogenetic relationships of Malvatheca (Bombacoideae and Malvoideae; Malvaceae sensu lato) as inferred from plastid DNA sequences. / Baum, David A.; Smith, Stacey DeWitt; Yen, Alan; Alverson, William S.; Nyffeler, Reto; Whitlock, Barbara A; Oldham, Rebecca L.
In: American Journal of Botany, Vol. 91, No. 11, 01.11.2004, p. 1863-1871.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Phylogenetic relationships of Malvatheca (Bombacoideae and Malvoideae; Malvaceae sensu lato) as inferred from plastid DNA sequences
AU - Baum, David A.
AU - Smith, Stacey DeWitt
AU - Yen, Alan
AU - Alverson, William S.
AU - Nyffeler, Reto
AU - Whitlock, Barbara A
AU - Oldham, Rebecca L.
PY - 2004/11/1
Y1 - 2004/11/1
N2 - Previous molecular phylogenetic analyses have revealed that elements of the former families Malvaceae sensu stricto and Bombacaceae together form a well-supported clade that has been named Malvatheca. Within Malvatheca, two major lineages have been observed; one, Bombacoideae, corresponds approximately to the palmate-leaved Bombacaceae, and the other, Malvoideae, includes the traditional Malvaceae (the mallows or Eumalvoideae). However, the composition of these two groups and their relationships to other elements of Malvatheca remain a source of uncertainty. Sequence data from two plastid regions, ndhF and trnK/matK, from 34 exemplars of Malvatheca and six outgroups were analyzed. Parsimony, likelihood, and Bayesian analyses of the sequence data provided a well-resolved phylogeny except that relationships among five lineages at the base of Malvatheca are poorly resolved. Nonetheless, a 6-bp insertion in matK suggests that Fremontodendreae is sister to the remainder of Malvatheca. Our results suggest that the Malvoideae originated in the Neotropics and that a mangrove taxon dispersed across the Pacific from South America to Australasia and later radiated out of Australasia to give rise to the ca. 1700 living species of Eumalvoideae. Local clock analyses imply that the plastid genome underwent accelerated molecular evolution coincident with the dispersal out of the Americas and again with the radiation into the three major clades of Eumalvoideae.
AB - Previous molecular phylogenetic analyses have revealed that elements of the former families Malvaceae sensu stricto and Bombacaceae together form a well-supported clade that has been named Malvatheca. Within Malvatheca, two major lineages have been observed; one, Bombacoideae, corresponds approximately to the palmate-leaved Bombacaceae, and the other, Malvoideae, includes the traditional Malvaceae (the mallows or Eumalvoideae). However, the composition of these two groups and their relationships to other elements of Malvatheca remain a source of uncertainty. Sequence data from two plastid regions, ndhF and trnK/matK, from 34 exemplars of Malvatheca and six outgroups were analyzed. Parsimony, likelihood, and Bayesian analyses of the sequence data provided a well-resolved phylogeny except that relationships among five lineages at the base of Malvatheca are poorly resolved. Nonetheless, a 6-bp insertion in matK suggests that Fremontodendreae is sister to the remainder of Malvatheca. Our results suggest that the Malvoideae originated in the Neotropics and that a mangrove taxon dispersed across the Pacific from South America to Australasia and later radiated out of Australasia to give rise to the ca. 1700 living species of Eumalvoideae. Local clock analyses imply that the plastid genome underwent accelerated molecular evolution coincident with the dispersal out of the Americas and again with the radiation into the three major clades of Eumalvoideae.
KW - Biogeography
KW - Bombacaceae
KW - Eumalvoideae
KW - Local clock analysis
KW - Malvatheca
KW - matK
KW - ndhF
KW - Phylogenetic nomenclature
UR - http://www.scopus.com/inward/record.url?scp=16244378116&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=16244378116&partnerID=8YFLogxK
U2 - 10.3732/ajb.91.11.1863
DO - 10.3732/ajb.91.11.1863
M3 - Article
C2 - 21652333
AN - SCOPUS:16244378116
VL - 91
SP - 1863
EP - 1871
JO - American Journal of Botany
JF - American Journal of Botany
SN - 0002-9122
IS - 11
ER -