Phylogenetic Relationships in the Group Caespitosa of <i>Paspalum</i> L. (Poaceae, Panicoideae, Paspaleae)
The informal group Caespitosa of <i>Paspalum</i> L. comprises 13–15 perennial species that are able to tolerate extreme climatic stresses, such as prolonged droughts, floods, and saltwater. Previous molecular phylogenetic studies have suggested that the Caespitosa might not be monophylet...
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MDPI AG
2023-01-01
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| author | Carolina Delfini Juan M. Acosta Sandra S. Aliscioni Vinicius Castro Souza Fernando O. Zuloaga |
| author_facet | Carolina Delfini Juan M. Acosta Sandra S. Aliscioni Vinicius Castro Souza Fernando O. Zuloaga |
| author_sort | Carolina Delfini |
| collection | DOAJ |
| description | The informal group Caespitosa of <i>Paspalum</i> L. comprises 13–15 perennial species that are able to tolerate extreme climatic stresses, such as prolonged droughts, floods, and saltwater. Previous molecular phylogenetic studies have suggested that the Caespitosa might not be monophyletic, but they did not analyze a large enough sample of taxa for a meaningful conclusion. In this study, we evaluate the phylogeny of the genus <i>Paspalum</i> using parsimony, likelihood, and Bayesian inference based on four DNA regions (ETS, <i>ndh</i>F, <i>rpl</i>16, and <i>trn</i>H-<i>psb</i>A) and increasing the number of sampled species (i.e., a total of 13 taxa and 40 new accessions of the group Caespitosa). Our main objective was to analyze the positions of Caespitosa taxa, assuming a priori that they do not represent a natural group as traditionally circumscribed. Our findings showed the Caespitosa species distributed in seven morphologically distinct clades and correlated with members of the informal groups Alma, Corcovadensia, Dissecta, Lachnea, Macrophylla, Notata, Paniculata, and Rupestria. Clades containing Caespitosa taxa were characterized based on morphological, anatomical, and cytological evidence, one of which was associated with geographic isolation. A comparison with results from other studies, a brief discussion on the group Macrophylla, which our analyses showed to be polyphyletic, and comments on the need for future molecular studies in <i>Paspalum</i> are also included. |
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| spelling | doaj.art-541cc94dfd54421e8549f6b3d2828b352023-11-16T20:03:32ZengMDPI AGDiversity1424-28182023-01-0115213410.3390/d15020134Phylogenetic Relationships in the Group Caespitosa of <i>Paspalum</i> L. (Poaceae, Panicoideae, Paspaleae)Carolina Delfini0Juan M. Acosta1Sandra S. Aliscioni2Vinicius Castro Souza3Fernando O. Zuloaga4Instituto de Botánica Darwinion (ANCEFN–CONICET), Labardén 200, Casilla de Correo 22, San Isidro B1642HYD, ArgentinaInstituto de Botánica Darwinion (ANCEFN–CONICET), Labardén 200, Casilla de Correo 22, San Isidro B1642HYD, ArgentinaInstituto de Botánica Darwinion (ANCEFN–CONICET), Labardén 200, Casilla de Correo 22, San Isidro B1642HYD, ArgentinaDepartamento de Ciências Biológicas, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Av. Pádua Dias 11, Piracicaba 13418–900, SP, BrazilInstituto de Botánica Darwinion (ANCEFN–CONICET), Labardén 200, Casilla de Correo 22, San Isidro B1642HYD, ArgentinaThe informal group Caespitosa of <i>Paspalum</i> L. comprises 13–15 perennial species that are able to tolerate extreme climatic stresses, such as prolonged droughts, floods, and saltwater. Previous molecular phylogenetic studies have suggested that the Caespitosa might not be monophyletic, but they did not analyze a large enough sample of taxa for a meaningful conclusion. In this study, we evaluate the phylogeny of the genus <i>Paspalum</i> using parsimony, likelihood, and Bayesian inference based on four DNA regions (ETS, <i>ndh</i>F, <i>rpl</i>16, and <i>trn</i>H-<i>psb</i>A) and increasing the number of sampled species (i.e., a total of 13 taxa and 40 new accessions of the group Caespitosa). Our main objective was to analyze the positions of Caespitosa taxa, assuming a priori that they do not represent a natural group as traditionally circumscribed. Our findings showed the Caespitosa species distributed in seven morphologically distinct clades and correlated with members of the informal groups Alma, Corcovadensia, Dissecta, Lachnea, Macrophylla, Notata, Paniculata, and Rupestria. Clades containing Caespitosa taxa were characterized based on morphological, anatomical, and cytological evidence, one of which was associated with geographic isolation. A comparison with results from other studies, a brief discussion on the group Macrophylla, which our analyses showed to be polyphyletic, and comments on the need for future molecular studies in <i>Paspalum</i> are also included.https://www.mdpi.com/1424-2818/15/2/134Gramineaeinformal groupsPaspalinaesystematicstaxonomy |
| spellingShingle | Carolina Delfini Juan M. Acosta Sandra S. Aliscioni Vinicius Castro Souza Fernando O. Zuloaga Phylogenetic Relationships in the Group Caespitosa of <i>Paspalum</i> L. (Poaceae, Panicoideae, Paspaleae) Diversity Gramineae informal groups Paspalinae systematics taxonomy |
| title | Phylogenetic Relationships in the Group Caespitosa of <i>Paspalum</i> L. (Poaceae, Panicoideae, Paspaleae) |
| title_full | Phylogenetic Relationships in the Group Caespitosa of <i>Paspalum</i> L. (Poaceae, Panicoideae, Paspaleae) |
| title_fullStr | Phylogenetic Relationships in the Group Caespitosa of <i>Paspalum</i> L. (Poaceae, Panicoideae, Paspaleae) |
| title_full_unstemmed | Phylogenetic Relationships in the Group Caespitosa of <i>Paspalum</i> L. (Poaceae, Panicoideae, Paspaleae) |
| title_short | Phylogenetic Relationships in the Group Caespitosa of <i>Paspalum</i> L. (Poaceae, Panicoideae, Paspaleae) |
| title_sort | phylogenetic relationships in the group caespitosa of i paspalum i l poaceae panicoideae paspaleae |
| topic | Gramineae informal groups Paspalinae systematics taxonomy |
| url | https://www.mdpi.com/1424-2818/15/2/134 |
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