Project 450: A. M. Cialdella, D. L. Salariato, L. Aagesen, L. M. Giussani, F. O. Zuloaga, O. Morrone. 2010. Phylogeny of New World Stipeae (Poaceae): an evaluation of the monophyly of Aciachne and Amelichloa. Cladistics. 26 (6):563-578.
Specimen: Piptochaetium montevidensis

Abstract

The tribe Stipeae, with nearly 550 species, includes 28 core genera, of which 13 occur in America: Achnatherum, Aciachne, Amelichloa, Anatherostipa, Hesperostipa, Jarava, Nassella, Ortachne, Oryzopsis, Pappostipa, Piptatherum, Piptochaetium and Ptilagrostis. Based on 37 species representing 14 Stipeae genera, and using four chloroplast markers and morphological characters, we provide a phylogenetic hypothesis of the New World Stipeae, with our focus on Amelichloa and Aciachne. Parsimony analyses included two approaches: (i) a multiple-sequence alignment where gaps were treated as missing or coded, (ii) using direct sequences by direct optimization as implemented by the program POY v.4.0.2870. Analyses under direct optimization were conducted using the molecular data sets independently and combined, and with morphological data. Different cost regimes were explored and the one producing the highest congruence between partitions was chosen. Among the genera considered, only Piptochaetium, Austrostipa, and Hesperostipa were resolved as monophyletic, while Achnatherum, Amelichloa s.l., Anatherostipa, Jarava and Nassella were polyphyletic, and Aciachne was polyphyletic or paraphyletic. As a result, Amelichloa can be restricted to a monophyletic group if including A. brachychaeta, A. ambigua, A. clandestina and A. caudata, or it should be considered within Nassella. The phylogenetic position of species of Aciachne suggests inbreeding and outbreeding events with species of Anatherostipa, Ortachne and Hesperostipa. The Willi Hennig Society 2010.


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Project DOI: 10.7934/P450, http://dx.doi.org/10.7934/P450
This project containsMatrices
  • 6 Media
  • 1 Matrix
  • 1 Document
  • 40 Taxa
  • 6 Specimens
  • 14 Characters
Total size of project's media files: 3 MB

Download Project SDD File
Total scored cells: 580
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 14
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 34
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:14/0
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MorphoBank Project 450


    Members

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    Maureen Admin
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    Ana Cialdella
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    Diego Salariato
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    Taxonomic Overview for Matrix 'M1031' (40 Taxa)

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    [1] Poa holciformis
    Last Modified in 12/05/13
    3121100004
    [2] Piptochaetium medium
    Last Modified in 12/05/13
    0141400004
    [3] Piptochaetium lasianthum
    Last Modified in 12/05/13
    0141400004
    [4] Pappostipa vaginata a
    Last Modified in 12/05/13
    0151400004
    [5] Nassella pampagrandensis
    Last Modified in 12/05/13
    0141400004
    [6] Piptochaetium montevidensis
    Last Modified in 12/05/13
    0151400004
    [7] Piptochaetium napostaense
    Last Modified in 12/05/13
    0141400004
    [8] Nassella melanosperma
    Last Modified in 12/05/13
    0141400004
    [9] Nassella arcuata
    Last Modified in 12/05/13
    0151400004
    [10] Nassella novari
    Last Modified in 12/05/13
    0141400004
    [11] Jarava leptostachya
    Last Modified in 12/05/13
    0151400004
    [12] Jarava media
    Last Modified in 12/05/13
    0151400004
    [13] Jarava plumosula
    Last Modified in 12/05/13
    0141400004
    [14] Piptatherum miliaceum
    Last Modified in 12/05/13
    0141400004
    [15] Aciachne acicularis
    Last Modified in 12/05/13
    0151400004
    [16] Anatherostipa brevis
    Last Modified in 12/05/13
    0141400004
    [17] Hesperostipa comata
    Last Modified in 12/05/13
    0141400004
    [18] Aciachne flagellifera
    Last Modified in 12/05/13
    0151400004
    [19] Achnatherum inebrians
    Last Modified in 12/05/13
    0141400004
    [20] Achnatherum chingii
    Last Modified in 12/05/13
    0141400004
    [21] Achnatherum psilantherum
    Last Modified in 12/05/13
    0141400004
    [22] Pappostipa vaginata b
    Last Modified in 12/05/13
    0151400004
    [23] Orysopsis asperifolia
    Last Modified in 12/05/13
    0151400004
    [24] Achnatherum bromoides
    Last Modified in 12/05/13
    0141400004
    [25] Ortachne erectifolia a
    Last Modified in 12/05/13
    0161400004
    [26] Amelichloa brachychaeta
    Last Modified in 12/05/13
    0141400004
    [27] Amelichloa caudata
    Last Modified in 12/05/13
    0141400004
    [28] Amelichloa brevipes
    Last Modified in 12/05/13
    0141400004
    [29] Ptilagrostis porteri
    Last Modified in 12/05/13
    0181400004
    [30] Austrostipa nodosa
    Last Modified in 12/05/13
    0161400004
    [31] Ortachne erectifolia b
    Last Modified in 12/05/13
    0161400004
    [32] Achnatherum diegoense
    Last Modified in 12/05/13
    0141400004
    [33] Anatherostipa orurensis
    Last Modified in 12/05/13
    0141400004
    [34] Hesperostipa neomexicana
    Last Modified in 12/05/13
    0141400004
    [35] Achnatherum multinode
    Last Modified in 12/05/13
    0141400004
    [36] Achnatherum eminens
    Last Modified in 12/05/13
    0141400004
    [37] Austostipa elegantissima
    Last Modified in 12/05/13
    0161400004
    [38] Amelichloa clandestina
    Last Modified in 12/05/13
    0141400004
    [39] Aciachne pulvinata
    Last Modified in 12/05/13
    0151400004
    [40] Amelichloa ambigua
    Last Modified in 12/05/13
    0141400004


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views22630
    Matrix views1831Matrix landing page (1634 views); Phylogeny of New World Stipeae (Poaceae): an evaluation of the monophyly of Aciachne and Amelichloa (197 views);
    Project overview3115
    Media views6873Media search (3833 views); M100815 (499 views); M100818 (482 views); M100814 (513 views); M100819 (513 views); M100816 (497 views); M100817 (536 views);
    Specimen list3813
    Taxon list4629
    Bibliography836
    Documents list1533




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    Total downloads from project183
    Matrix downloads4Phylogeny of New World Stipeae (Poaceae): an evaluation of the monophyly of Aciachne and Amelichloa (4 downloads);
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