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A Preliminary Approach to the Phylogeny of the Genus Paspalum (Poaceae)

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Abstract

The present work intends to clarify the phylogenetic relationships among the species of Paspalum L. belonging to the informal groups Notata/Linearia and Dilatata, and to raise some preliminary hypotheses on the phylogeny of the genus as a whole. A combined dataset including morphological and molecular characters was used to analyze 28 species of Paspalum plus some representatives of related genera of the tribe Paniceae. Analyses were performed using both parsimony and maximum likelihood. The monophyly of Paspalum is not supported nor contradicted. The circumscription of informal groups of Paspalum is discussed, as well as the cladistic treatment of allopolyploid taxa, especially those comprising the Dilatata group. The relationships of members of the Dilatata with their putative progenitors is confirmed, but the monophyly of the group as a whole is not. A close relationship between P. dilatatum Poir. and P. lividum Trin. ex Schltdl. is shown. Our analysis is consistent with the monophyly of a group comprising Notata+Linearia, with a monophyletic Notata group nested within it. The delimitation of the core Notata is proposed by including P. conduplicatum Canto-Dorow, Valls and Longhi-Wagner, P. notatum Flüggé, P. minus E. Fourn., P. pumilum Nees and P. subciliatum Chase.

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Authors and Affiliations

  1. Departamento de Botânica, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, CEP 91501-970, Brazil

    Tatiana T. Souza-Chies

  2. Programa de Pós-Graduação em Botânica, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, CEP 91501-970, Brazil

    Tatiana T. Souza-Chies & Liliana Essi

  3. Facultad de Agronomía, Cátedra de Botánica Agrícola, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina

    Gabriel H. Rua

  4. Bolsista de Produtividade em Pesquisa do Conselho Nacional de Desenvolvimento Científico e Tecnológico/CNPq., Centro Nacional de Pesquisa de Recursos Genéticos e Biotecnologia, Embrapa Cenargen, Caixa Postal 02372, 70770-900, Brasília, DF, Brazil

    José Francisco M. Valls

  5. Programa de Pós-Graduação em Genética e Biologia Molecular, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, CEP 91501-970, Brazil

    Tatiana T. Souza-Chies & Rogéria B. Miz

  6. Investigador Adjunto, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina

    Gabriel H. Rua

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  1. Tatiana T. Souza-Chies
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  3. Gabriel H. Rua
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Souza-Chies, T.T., Essi, L., Rua, G.H. et al. A Preliminary Approach to the Phylogeny of the Genus Paspalum (Poaceae). Genetica 126, 15–32 (2006). https://doi.org/10.1007/s10709-005-1428-1

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