INVESTIGADORES
ZULOAGA Fernando Omar
artículos
Título:
New grass phylogeny resolves deep evolutionary relationships and discovers C4 origins
Autor/es:
ALISCIONI, S. S.; HESTER L. BELL; GUILLAUME BESNARD; PASCAL-ANTOINE CHRISTIN; J. TRAVIS COLUMBUS; MELVIN R. DUVALL; ERIKA J. EDWARDS; GIUSSANI, L.M.; KELLOGG, E.A; MORRONE, O.; ZULOAGA, F. O.
Revista:
NEW PHYTOLOGIST
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2011 vol. 193 p. 304 - 312
ISSN:
0028-646X
Resumen:
Grasses rank among the worlds most ecologically and economically important plants.
Repeated evolution of the C4 syndrome has made photosynthesis highly efficient in many
grasses, inspiring intensive efforts to engineer the pathway into C3 crops. However, comparative
biology has been of limited use to this endeavor because of uncertainty in the number
and phylogenetic placement of C4 origins.4 syndrome has made photosynthesis highly efficient in many
grasses, inspiring intensive efforts to engineer the pathway into C3 crops. However, comparative
biology has been of limited use to this endeavor because of uncertainty in the number
and phylogenetic placement of C4 origins.3 crops. However, comparative
biology has been of limited use to this endeavor because of uncertainty in the number
and phylogenetic placement of C4 origins.4 origins.
We built the most comprehensive and robust molecular phylogeny for grasses to date,
expanding sampling efforts of a previous working group from 62 to 531 taxa, emphasizing
the C4-rich PACMAD (Panicoideae, Arundinoideae, Chloridoideae, Micrairoideae, Aristidoideae
and Danthonioideae) clade. Our final matrix comprises c. 5700 bp and is > 93%
complete.We built the most comprehensive and robust molecular phylogeny for grasses to date,
expanding sampling efforts of a previous working group from 62 to 531 taxa, emphasizing
the C4-rich PACMAD (Panicoideae, Arundinoideae, Chloridoideae, Micrairoideae, Aristidoideae
and Danthonioideae) clade. Our final matrix comprises c. 5700 bp and is > 93%
complete.4-rich PACMAD (Panicoideae, Arundinoideae, Chloridoideae, Micrairoideae, Aristidoideae
and Danthonioideae) clade. Our final matrix comprises c. 5700 bp and is > 93%
complete.c. 5700 bp and is > 93%
complete.
For the first time, we present strong support for relationships among all the major grass
lineages. Several new C4 lineages are identified, and previously inferred origins confirmed.
C3/C4 evolutionary transitions have been highly asymmetrical, with 2224 inferred origins of
the C4 pathway and only one potential reversal.For the first time, we present strong support for relationships among all the major grass
lineages. Several new C4 lineages are identified, and previously inferred origins confirmed.
C3/C4 evolutionary transitions have been highly asymmetrical, with 2224 inferred origins of
the C4 pathway and only one potential reversal.4 lineages are identified, and previously inferred origins confirmed.
C3/C4 evolutionary transitions have been highly asymmetrical, with 2224 inferred origins of
the C4 pathway and only one potential reversal.3/C4 evolutionary transitions have been highly asymmetrical, with 2224 inferred origins of
the C4 pathway and only one potential reversal.4 pathway and only one potential reversal.
Our backbone tree clarifies major outstanding systematic questions and highlights C3 and
C4 sister taxa for comparative studies. Two lineages have emerged as hotbeds of C4 evolution.
Future work in these lineages will be instrumental in understanding the evolution of this
complex trait.Our backbone tree clarifies major outstanding systematic questions and highlights C3 and
C4 sister taxa for comparative studies. Two lineages have emerged as hotbeds of C4 evolution.
Future work in these lineages will be instrumental in understanding the evolution of this
complex trait.4 sister taxa for comparative studies. Two lineages have emerged as hotbeds of C4 evolution.
Future work in these lineages will be instrumental in understanding the evolution of this
complex trait.