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A phylogenetic study of subtribe Otachyriinae (Poaceae, Panicoideae, Paspaleae)

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An Erratum to this article was published on 26 June 2014

Abstract

The subtribe Otachyriinae was established, within tribe Paniceae, by Butzin in 1970, originally including 18 genera. Recent phylogenetic studies, based on molecular data, indicated that Otachyriinae belongs to tribe Paspaleae and is represented by the genera Anthaenantia, Hymenachne, Dallwatsonia, Otachyrium, species of Panicum sect. Laxa, Plagiantha, and Steinchisma. These taxa show a peculiar diversity in photosynthetic types, including C4 species, C3–C4 intermediates and C3 species. The internal evolutionary relationships among members of Otachyriinae have not yet been explored in detail. With the aim of providing new evidence to understand phylogenetic relationships of taxa included in Otachyriinae, 21 new sequences of the ndhF gene from 34 species were generated and analyzed using Bayesian inference and maximum parsimony (MP). The evolution of photosynthetic pathway was studied employing MP, Markov chain Monte Carlo, and maximum likelihood methods. Our results confirm that subtribe Otachyriinae is monophyletic. Within the subtribe, Anthaenanthia is a monophyletic C4 genus and is sister to the remaining species included in this treatment. Hymenachne and Panicum sect. Laxa, in its traditional concept, are polyphyletic; Dallwatsonia, P. auritum, and P. hemitomon are treated within Hymenachne, while three species of Panicum sect. Laxa are considered a new genus in the subtribe. The genus Otachyrium is paraphyletic, while all species of Steinchisma are recovered as a monophyletic group with high support. Finally, our data suggest that C4 and C3–C4 photosynthesis evolved just once each during the speciation of the subtribe from a C3 ancestor.

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Acknowledgments

This study was supported by Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), grants PID 11220100207 and PIP 11220100100155 and by the National Geographic Society, grant 8862-10. The authors sincerely thank two anonymous reviewers for comments that greatly strengthened the manuscript.

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Correspondence to J. M. Acosta.

Appendix

Appendix

Sampled taxa, voucher specimens from which DNA was extracted for sequencing, and GenBank accession numbers. Specimens sequenced for this paper are in bold and underlined

Tribe Andropogoneae

Phacelurus digitatus (Sibth. & Sm.) Griseb., AF117418

Sorghum bicolor (L.) Moench, U21981

Zea mays L., U21985

Tribe Arundinelleae

Arundinella hirta (Thunb.) Tanaka, AF117393

Arundinella nepalensis Trin., AF117394

Tribe Paspaleae

Subtribe Arthropogoninae

Altoparadisium chapadense Filg. & Al., AY029619

Apochloa. subtiramulosa (Renvoize & Zuloaga) Zuloaga & Morrone, AY188490

Arthropogon villosus Nees, AY029622

Coleataenia anceps (Michx.) Soreng, AY188455

Coleataenia caricoides Nees ex Trin. Morrone 4969, GU253330

Coleataenia petersonii (Hitchc. and Ekman) Soreng, AY188479

Coleataenia prionitis (Nees) Soreng, AY029652

Coleataenia rigidula Bosc ex Nees, AY188482

Coleataenia stenodes Griseb. Zuloaga 9540, GU253333

Coleataenia tenera (Beyr. ex Trin.) Soreng, AY188491

Homolepis glutinosa (Sw.) Zuloaga & Soderstr., AY029637

Mesosetum chaseae Luces, AY029641 (Giussani & al. 2001)

Oncorachis ramosa (Zuloaga & Soderstr.) Morrone & Zuloaga, AY029686

Oplismenopsis najada (Hack. & Arechav.) Parodi, AY188453

Phanopyrum gymnocarpon (Elliott) Nash, AY188469

Subtribe Otachyriinae.

Anthaenantia lanata (Kunth) Benth., AY029640

Anthaenantia rufa (Elliott) Schult., Henderson 96820; Dale Thomas 158388

Anthaenantia texana Kral, Kral 93287

Anthaenantia villosa (Michx.) P. Beauv., Kral 93319; Atha 3578

Dallwatsonia felliana B.K. Simon, JN604685.

Hymenachne amplexicaulis (Rudge) Nees, Morrone 5190

Hymenachne amplexicaulis (Rudge) Nees AM849158

Hymenachne donacifolia (Raddi) Chase, AY029635

Hymenachne grumosa (Nees) Zuloaga, AY188468

Hymenachne pernambucense (Spreng.) Zuloaga, AY188478

Hymenachne pseudointerrupta Müll. Hal., Beusehom 4230

Otachyrium aquaticum Send. & Soderstr., Mori 12348

Otachyrium grandiflorum Send. & Soderstr., Fonseca & Alvarenga 2206

Otachyrium piligerum Send. & Soderstr., Rodriguez 157

Otachyrium pterigodium (Trin.) Pilg., Andersson 8880

Otachyrium seminudum Hack. ex Send. & Soderstr., Walter 904; Dias 82

Otachyrium succisum (Swallen) Send. & Soderstr., Jansen-Jacobs 2723; Jansen-Jacobs 2816

Otachyrium versicolor (Döll) Henrard, AY029643

Plagiantha tenella Renvoize, AY029674

Panicum auritum J. Presl ex Nees, Olsen 144

Panicum harleyi D. Salariato, Morrone & Zuloaga, Harley 5480

Panicum hemitomon Schult., Jones 23315

Panicum hylaeicum Mez, AY188470

Panicum leptachne Döll, Longhi-Wagner 9511

Panicum pilosum Sw., AY188480

Panicum polygonatum Schrad., Morrone 4269

Panicum stagnatile Hitchc. & Chase, Harmel 8404

Panicum stevensianum Hitchc. & Chase, Ekman 1088

Steinchisma cuprea (Hitchc. & Chase) W.V. Br., Beetle 7708

Steinchisma decipiens (Nees ex Trin.) W.V. Br., AY188499

Steinchisma exiguiflora (Griseb.) W.V. Br., Zuloaga 9580

Steinchisma hians (Elliot) Nash, AY029685

Steinchisma laxa (Sw.) Zuloaga, AY029655

Steinchisma spathellosa (Döll) Renvoize, AY188500

Steinchisma stenophylla (Hack.) Zuloaga & Morrone, Veredao da Silva 3459, Mendonca 3192

Subtribe Paspalinae

Axonopus anceps (Mez) Hitchc., AY029623

Axonopus hydrolithica Davidse and Zuloaga, AY029642

Hopia obtusa (Kunth) Zuloaga & Morrone, AY029659

Ichnanthus pallens (Sw.) Munro ex Benth., AY029638

Panicum tuerckheimii Hack., AY188494

Panicum validum Mez, AY188495

Paspalum arundinellum Mez, AY029663

Paspalum conjugatum Bergius, AY029669

Paspalum glaziovii (A.G. Burm.) S. Denham, AY029689

Paspalum remotum J. Remy, AY029668

Paspalum vaginatum Sw., AY029665

Renvoizea trinii (Kunth) Zuloaga & Morrone, EU107781

Streptostachys asperifolia Desv., AY029687

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Acosta, J.M., Scataglini, M.A., Reinheimer, R. et al. A phylogenetic study of subtribe Otachyriinae (Poaceae, Panicoideae, Paspaleae). Plant Syst Evol 300, 2155–2166 (2014). https://doi.org/10.1007/s00606-014-1034-8

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