New grass phylogeny resolves deep evolutionary relationships and discovers C4 origins.

Details

Serval ID
serval:BIB_BB622F7740B2
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
New grass phylogeny resolves deep evolutionary relationships and discovers C4 origins.
Journal
New Phytologist
Working group(s)
Grass Phylogeny Working Group II
Contributor(s)
Aliscioni S., Bell HL., Besnard G., Christin PA., Columbus J., Duvall MR., Edwards EJ., Giussani L., Hasenstab-Lehman K., Hilu KW., Hodkinson TR., Ingram AL., Kellogg EA., Mashayekhi S., Morrone O., Osborne CP., Salamin N., Schaefer H., Spriggs E., Smith SA., Zuloaga F.
ISSN
1469-8137 (Electronic)
ISSN-L
0028-646X
Publication state
Published
Issued date
2012
Volume
193
Number
2
Pages
304-312
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
Publication Status: ppublish
Abstract
• Grasses rank among the world's most ecologically and economically important plants. Repeated evolution of the C(4) syndrome has made photosynthesis highly efficient in many grasses, inspiring intensive efforts to engineer the pathway into C(3) crops. However, comparative biology has been of limited use to this endeavor because of uncertainty in the number and phylogenetic placement of C(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 C(4)-rich PACMAD (Panicoideae, Arundinoideae, Chloridoideae, Micrairoideae, Aristidoideae and Danthonioideae) clade. Our final matrix comprises 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 C(4) lineages are identified, and previously inferred origins confirmed. C(3)/C(4) evolutionary transitions have been highly asymmetrical, with 22-24 inferred origins of the C(4) pathway and only one potential reversal. • Our backbone tree clarifies major outstanding systematic questions and highlights C(3) and C(4) sister taxa for comparative studies. Two lineages have emerged as hotbeds of C(4) evolution. Future work in these lineages will be instrumental in understanding the evolution of this complex trait.
Keywords
Biological Evolution, Carbon/metabolism, Photosynthesis, Phylogeny, Poaceae/genetics, Species Specificity
Pubmed
Web of science
Open Access
Yes
Create date
12/01/2012 8:37
Last modification date
20/08/2019 15:29
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