IBODA   05360
INSTITUTO DE BOTANICA DARWINION
Unidad Ejecutora - UE
artículos
Título:
Phylogenetic relationships of Piptochaetium Presl (Poaceae: Stipeae) and related genera reconstructed from nuclear and chloroplast sequence datasets
Autor/es:
BARBER J. C., K. A. HAMES, A. M. CIALDELLA, L. M. GIUSSANI, & O. MORRONE
Revista:
TAXON
Referencias:
Año: 2009 vol. 58 p. 375 - 380
ISSN:
0040-0262
Resumen:
Piptochaetium (Poaceae, Pooideae, Stipeae) is a New World genus of grasses distributed primarily in temperate
South America, with several species extending into Central and southern North America. The genus
comprises 36 species and 2 varieties. Morphological synapomorphies for the genus include involute lemma
margins that fit into the palea groove, a bi-keeled palea longer than the lemma and protruding from the lemma
apex, and fundamental cell sidewalls that are regularly dentate. The closely related genera Nassella (116 species)
and Jarava (59 species) are also primarily South American, with a few species found in Central and
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
and Jarava (59 species) are also primarily South American, with a few species found in Central and
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
South America, with several species extending into Central and southern North America. The genus
comprises 36 species and 2 varieties. Morphological synapomorphies for the genus include involute lemma
margins that fit into the palea groove, a bi-keeled palea longer than the lemma and protruding from the lemma
apex, and fundamental cell sidewalls that are regularly dentate. The closely related genera Nassella (116 species)
and Jarava (59 species) are also primarily South American, with a few species found in Central and
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
and Jarava (59 species) are also primarily South American, with a few species found in Central and
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
(Poaceae, Pooideae, Stipeae) is a New World genus of grasses distributed primarily in temperate
South America, with several species extending into Central and southern North America. The genus
comprises 36 species and 2 varieties. Morphological synapomorphies for the genus include involute lemma
margins that fit into the palea groove, a bi-keeled palea longer than the lemma and protruding from the lemma
apex, and fundamental cell sidewalls that are regularly dentate. The closely related genera Nassella (116 species)
and Jarava (59 species) are also primarily South American, with a few species found in Central and
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
and Jarava (59 species) are also primarily South American, with a few species found in Central and
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
Nassella (116 species)
and Jarava (59 species) are also primarily South American, with a few species found in Central and
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
Jarava (59 species) are also primarily South American, with a few species found in Central and
North America. Published molecular studies to date have focused upon generic-level relationships within the
tribe Stipeae, but none have included more than a few representatives of each genus. We present here results
of phylogenetic analyses of these genera based upon combined DNA sequences of both nuclear (ITS) and
cpDNA (rpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassellarpl16, trnL-F) markers. Piptochaetium is supported as monophyletic in all studies, whereas Nassella
is recovered as monophyletic only if Jarava plumosa is included. Infrageneric relationships of PiptochaetiumJarava plumosa is included. Infrageneric relationships of Piptochaetium
are also compared to a recent morphological phylogeny of the genus.