IBODA   05360
INSTITUTO DE BOTANICA DARWINION
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Phylogenetic structure in the large genus Poa
Autor/es:
SORENG, RJ1, GILLESPIE, LJ2, GIUSSANI, LM3, SCATAGLINI,
Lugar:
Melbourne
Reunión:
Congreso; XVIII International Botanical Congress; 2011
Institución organizadora:
International Union of Biological Sciences (IUBS),
Resumen:
A phylogenetic analysis of Poa L. (over 500 spp.) using
an expanded sample of species from around the world
(269 spp. and an additional 39 infraspecies have been
examined for plastid and or nrDNA types), with more
complete sampling for plastid trn TLF region and
nrDNA spacer regions ITS and ETS than previous
studies, revealed two large derived clades (number of
species based on morphology) subgen. Poa (PoaPoa L. (over 500 spp.) using
an expanded sample of species from around the world
(269 spp. and an additional 39 infraspecies have been
examined for plastid and or nrDNA types), with more
complete sampling for plastid trn TLF region and
nrDNA spacer regions ITS and ETS than previous
studies, revealed two large derived clades (number of
species based on morphology) subgen. Poa (Poatrn TLF region and
nrDNA spacer regions ITS and ETS than previous
studies, revealed two large derived clades (number of
species based on morphology) subgen. Poa (PoaPoa (Poa
Homalopoa; 360 spp.) and subgen. Stenopoa (85 spp.)
that contain most of the species in the genus. The subgen.; 360 spp.) and subgen. Stenopoa (85 spp.)
that contain most of the species in the genus. The subgen.
Ochlopoa clade contains a further 36 spp., subgen.clade contains a further 36 spp., subgen.
Pseudopoa (Eremopoa) 5 spp., subgen. Sylvestres 8 spp.,
and sect. Pandemos 2 spp. The small 'N-clade' had 3
diploid species confined to it by plastid and nrDNA,
including the monotypic sect. Nanopoa and two species
placed in other non-monophyletic sections, and 11
polyploid species (including all species of sect.
Secundae, and some of Glariosae) that share plastid
types with it, but ITSETS types with the Stenopoa, and some of Glariosae) that share plastid
types with it, but ITSETS types with the StenopoaStenopoa
clade. Individuals of Poa bulbosa (sect. Arenariae) had
plastid/nrDNA combinations either aligning within the N
clade, or within the clade with consectional species in thePoa bulbosa (sect. Arenariae) had
plastid/nrDNA combinations either aligning within the N
clade, or within the clade with consectional species in the
Ochlopoa clade, but no intermixed types. An odd and
strongly supported nrDNA ITSETS 'X-clade', for which
no corresponding plastid clade has been identified,
resolved for 40 species (no diploids known among them)
from around the Pacific basin (China, Hawaii, Japan,
New Guinea, New Zealand, North and South America:
including sects. Acroleucae, Malacanthae,clade, but no intermixed types. An odd and
strongly supported nrDNA ITSETS 'X-clade', for which
no corresponding plastid clade has been identified,
resolved for 40 species (no diploids known among them)
from around the Pacific basin (China, Hawaii, Japan,
New Guinea, New Zealand, North and South America:
including sects. Acroleucae, Malacanthae,Acroleucae, Malacanthae,
Siphonocoleus, and elements of Orienos, Pauciflorae,
and about 2/3 of New Zealand species). Plastid
sequences of species with X-type nrDNA mostly
resolved in the PoaHomalopoa clade, but 4 other
species aligned with sects. Orienos and Pauciflorae.
Based on DNA studies Poa is considered to include the
genera Anthochloa, Aphanelytrum, Austrofestuca s.s.,, and elements of Orienos, Pauciflorae,
and about 2/3 of New Zealand species). Plastid
sequences of species with X-type nrDNA mostly
resolved in the PoaHomalopoa clade, but 4 other
species aligned with sects. Orienos and Pauciflorae.
Based on DNA studies Poa is considered to include the
genera Anthochloa, Aphanelytrum, Austrofestuca s.s.,PoaHomalopoa clade, but 4 other
species aligned with sects. Orienos and Pauciflorae.
Based on DNA studies Poa is considered to include the
genera Anthochloa, Aphanelytrum, Austrofestuca s.s.,Orienos and Pauciflorae.
Based on DNA studies Poa is considered to include the
genera Anthochloa, Aphanelytrum, Austrofestuca s.s.,Poa is considered to include the
genera Anthochloa, Aphanelytrum, Austrofestuca s.s.,Anthochloa, Aphanelytrum, Austrofestuca s.s.,
Dissanthelium, Eremopoa, Parodiochloa, Tovarochloa,, Eremopoa, Parodiochloa, Tovarochloa,
Tzvelevia; exclude the more recently described genera; exclude the more recently described genera
Arctopoa, Nicoraepoa, Saxipoa, Sylvipoa; and to have
reticulate relationships with Aniselytron, Arctopoa, and, Nicoraepoa, Saxipoa, Sylvipoa; and to have
reticulate relationships with Aniselytron, Arctopoa, andAniselytron, Arctopoa, and
Nicoraepoa(Eremopoa) 5 spp., subgen. Sylvestres 8 spp.,
and sect. Pandemos 2 spp. The small 'N-clade' had 3
diploid species confined to it by plastid and nrDNA,
including the monotypic sect. Nanopoa and two species
placed in other non-monophyletic sections, and 11
polyploid species (including all species of sect.
Secundae, and some of Glariosae) that share plastid
types with it, but ITSETS types with the Stenopoa, and some of Glariosae) that share plastid
types with it, but ITSETS types with the StenopoaStenopoa
clade. Individuals of Poa bulbosa (sect. Arenariae) had
plastid/nrDNA combinations either aligning within the N
clade, or within the clade with consectional species in thePoa bulbosa (sect. Arenariae) had
plastid/nrDNA combinations either aligning within the N
clade, or within the clade with consectional species in the
Ochlopoa clade, but no intermixed types. An odd and
strongly supported nrDNA ITSETS 'X-clade', for which
no corresponding plastid clade has been identified,
resolved for 40 species (no diploids known among them)
from around the Pacific basin (China, Hawaii, Japan,
New Guinea, New Zealand, North and South America:
including sects. Acroleucae, Malacanthae,clade, but no intermixed types. An odd and
strongly supported nrDNA ITSETS 'X-clade', for which
no corresponding plastid clade has been identified,
resolved for 40 species (no diploids known among them)
from around the Pacific basin (China, Hawaii, Japan,
New Guinea, New Zealand, North and South America:
including sects. Acroleucae, Malacanthae,Acroleucae, Malacanthae,
Siphonocoleus, and elements of Orienos, Pauciflorae,
and about 2/3 of New Zealand species). Plastid
sequences of species with X-type nrDNA mostly
resolved in the PoaHomalopoa clade, but 4 other
species aligned with sects. Orienos and Pauciflorae.
Based on DNA studies Poa is considered to include the
genera Anthochloa, Aphanelytrum, Austrofestuca s.s.,, and elements of Orienos, Pauciflorae,
and about 2/3 of New Zealand species). Plastid
sequences of species with X-type nrDNA mostly
resolved in the PoaHomalopoa clade, but 4 other
species aligned with sects. Orienos and Pauciflorae.
Based on DNA studies Poa is considered to include the
genera Anthochloa, Aphanelytrum, Austrofestuca s.s.,PoaHomalopoa clade, but 4 other
species aligned with sects. Orienos and Pauciflorae.
Based on DNA studies Poa is considered to include the
genera Anthochloa, Aphanelytrum, Austrofestuca s.s.,Orienos and Pauciflorae.
Based on DNA studies