Paspalum schesslii (Poaceae, Paspaleae), a new species from Mato Grosso (Brazil) with an unusual base chromosome number
Fil: Bonasora, Marisa Graciela. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Botánica Sistemática; Argentina.
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| Formato: | Artículo publishedVersion |
| Lenguaje: | Inglés |
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Springer
2015
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| Acceso en línea: | https://hdl.handle.net/20.500.12219/4469 |
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I77-R195-20.500.12219-4469 |
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I77-R195-20.500.12219-44692024-06-04T12:13:44Z Paspalum schesslii (Poaceae, Paspaleae), a new species from Mato Grosso (Brazil) with an unusual base chromosome number Bonasora, Marisa Graciela Pozzobon, Marisa T. Honfi, Ana Isabel Rua, Gabriel Hugo Paspalum malmeanum Paspalum eucomum Paspalum stellatum Brazilian flora Cytogenetics Grass taxonomy Fil: Bonasora, Marisa Graciela. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Botánica Sistemática; Argentina. Fil: Pozzobon, Marisa T. Empresa Brasileira de Pesquisa Agropecuaria Recursos Genéticos e Biotecnologia; Brasil. Fil: Honfi, Ana Isabel. Universidad Nacional de Misiones. Facultad de Ciencias Exactas, Químicas y Naturales. Instituto de Biología Subtropical. Programa de Estudios Florísticos y Genética Vegetal. Laboratorio de Citogenética Vegetal; Argentina. Fil: Honfi, Ana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico (Nordeste). Instituto de Biología Subtropical. Programa de Estudios Florísticos y Genética Vegetal; Argentina. Fil: Rua, Gabriel Hugo. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Botánica Sistemática; Argentina. Paspalum schesslii, a new species from the state of Mato Grosso in central-western Brazil, is described and illustrated. The new species is related to P. malmeanum, from central-western Brazil and eastern Bolivia, and Paspalum eucomum, from central Brazil. It comprises shorter plants with leaf blades and racemes shorter than those of the related species, and spikelets having obovate, deciduous upper florets. An unexpected chromosome number 2n=12 was found in specimens of P. schesslii; thus it differs from both P. malmeanum, which has 2n=20, and P. eucomum, for which 2n=30 and 2n=32 chromosome counts are here reported for the first time. The discovery of a new species having 2n=12, which often cohabits with diploid populations of the widespread related species, P. stellatum, is consistent with an hypothesis about the hybrid origin of the polyploid cytotypes of P. stellatum having 2n=32 and 2n=52 chromosomes. Moreover, such an hybrid origin involving parental species with different base chromosome numbers (x=6 and x=10) could also explain the occurrence of 32 chromosomes in P. eucomum, potentially documenting a speciation mechanism that is otherwise unknown in the genus. 2015-07-29 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://hdl.handle.net/20.500.12219/4469 eng info:eu-repo/semantics/altIdentifier/urn/https://link.springer.com/article/10.1007/s00606-015-1231-0 info:eu-repo/semantics/openAccess application/pdf application/pdf 1.684 MB Springer |
| institution |
Universidad Nacional de Misiones |
| institution_str |
I-77 |
| repository_str |
R-195 |
| collection |
Repositorio Institucional Digital de la UNaM (RIDUNAM) |
| language |
Inglés |
| topic |
Paspalum malmeanum Paspalum eucomum Paspalum stellatum Brazilian flora Cytogenetics Grass taxonomy |
| spellingShingle |
Paspalum malmeanum Paspalum eucomum Paspalum stellatum Brazilian flora Cytogenetics Grass taxonomy Bonasora, Marisa Graciela Pozzobon, Marisa T. Honfi, Ana Isabel Rua, Gabriel Hugo Paspalum schesslii (Poaceae, Paspaleae), a new species from Mato Grosso (Brazil) with an unusual base chromosome number |
| topic_facet |
Paspalum malmeanum Paspalum eucomum Paspalum stellatum Brazilian flora Cytogenetics Grass taxonomy |
| description |
Fil: Bonasora, Marisa Graciela. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Botánica Sistemática; Argentina. |
| format |
Artículo Artículo publishedVersion |
| author |
Bonasora, Marisa Graciela Pozzobon, Marisa T. Honfi, Ana Isabel Rua, Gabriel Hugo |
| author_facet |
Bonasora, Marisa Graciela Pozzobon, Marisa T. Honfi, Ana Isabel Rua, Gabriel Hugo |
| author_sort |
Bonasora, Marisa Graciela |
| title |
Paspalum schesslii (Poaceae, Paspaleae), a new species from Mato Grosso (Brazil) with an unusual base chromosome number |
| title_short |
Paspalum schesslii (Poaceae, Paspaleae), a new species from Mato Grosso (Brazil) with an unusual base chromosome number |
| title_full |
Paspalum schesslii (Poaceae, Paspaleae), a new species from Mato Grosso (Brazil) with an unusual base chromosome number |
| title_fullStr |
Paspalum schesslii (Poaceae, Paspaleae), a new species from Mato Grosso (Brazil) with an unusual base chromosome number |
| title_full_unstemmed |
Paspalum schesslii (Poaceae, Paspaleae), a new species from Mato Grosso (Brazil) with an unusual base chromosome number |
| title_sort |
paspalum schesslii (poaceae, paspaleae), a new species from mato grosso (brazil) with an unusual base chromosome number |
| publisher |
Springer |
| publishDate |
2015 |
| url |
https://hdl.handle.net/20.500.12219/4469 |
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