A classification of the Chloridoideae (Poaceae) based on multi-gene phylogenetic trees
We conducted a molecular phylogenetic study of the subfamily Chloridoideae using six plastid DNA sequences ( ndhA intron , ndhF, rps16-trnK, rps16 intron , rps3, and rpl32-trnL) and a single nuclear ITS DNA sequence. Our large original data set includes 246 species (17.3%) representing 95 genera (66...
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Veröffentlicht in: | Molecular phylogenetics and evolution 2010-05, Vol.55 (2), p.580-598 |
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Zusammenfassung: | We conducted a molecular phylogenetic study of the subfamily Chloridoideae using six plastid DNA sequences (
ndhA intron
, ndhF, rps16-trnK, rps16 intron
, rps3, and
rpl32-trnL) and a single nuclear ITS DNA sequence. Our large original data set includes 246 species (17.3%) representing 95 genera (66%) of the grasses currently placed in the Chloridoideae. The maximum likelihood and Bayesian analysis of DNA sequences provides strong support for the monophyly of the Chloridoideae; followed by, in order of divergence: a Triraphideae clade with
Neyraudia sister to
Triraphis; an Eragrostideae clade with the Cotteinae (includes
Cottea and Enneapogon) sister to the Uniolinae (includes
Entoplocamia, Tetrachne, and
Uniola), and a terminal Eragrostidinae clade of
Ectrosia, Harpachne, and
Psammagrostis embedded in a polyphyletic
Eragrostis; a Zoysieae clade with
Urochondra sister to a Zoysiinae (
Zoysia) clade, and a terminal Sporobolinae clade that includes
Spartina, Calamovilfa, Pogoneura, and
Crypsis embedded in a polyphyletic
Sporobolus; and a very large terminal Cynodonteae clade that includes 13 monophyletic subtribes. The Cynodonteae includes, in alphabetical order: Aeluropodinae (
Aeluropus); Boutelouinae (
Bouteloua); Eleusininae (includes
Apochiton, Astrebla with
Schoenefeldia embedded,
Austrochloris,
Brachyachne, Chloris, Cynodon with
Brachyachne embedded in part,
Eleusine, Enteropogon with
Eustachys embedded in part,
Eustachys, Chrysochloa, Coelachyrum, Leptochloa with
Dinebra embedded,
Lepturus, Lintonia, Microchloa, Saugetia, Schoenefeldia, Sclerodactylon, Tetrapogon, and
Trichloris); Hilariinae (
Hilaria); Monanthochloinae (includes
Distichlis, Monanthochloe, and
Reederochloa); Muhlenbergiinae (
Muhlenbergia with
Aegopogon, Bealia, Blepharoneuron, Chaboissaea, Lycurus, Pereilema, Redfieldia, Schaffnerella, and
Schedonnardus all embedded); Orcuttiinae (includes
Orcuttia and
Tuctoria); Pappophorinae (includes
Neesiochloa and
Pappophorum); Scleropogoninae (includes
Blepharidachne, Dasyochloa, Erioneuron, Munroa, Scleropogon, and
Swallenia); Traginae (
Tragus with
Monelytrum, Polevansia, and
Willkommia all embedded); Tridentinae (includes
Gouinia, Tridens, Triplasis, and
Vaseyochloa); Triodiinae (
Triodia); and the Tripogoninae (
Melanocenchris and
Tripogon with
Eragrostiella embedded). In our study the Cynodonteae still include 19 genera and the Zoysieae include a single genus that are not yet placed in a subtribe. The tribe
Triraphideae and the subtribe
A |
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ISSN: | 1055-7903 1095-9513 |
DOI: | 10.1016/j.ympev.2010.01.018 |