Niveles de ploidía de algunas especies de Paspalum, Poaceae de Paraguay
; Schneider, Juan Sebastián
; Eckers, Fabiana
; Perichon, Maria Constanza
; Daviña, Julio Rubén ; Honfi, Ana Isabel 
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Fecha
12/2023
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Universidad Nacional de Asunción. Facultad de Ciencias Exactas y Naturales. Laboratorio de Recursos Vegetales
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Steviana
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2304-2907
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Niveles de ploidía de algunas especies de Paspalum, Poaceae de Paraguay. El género Paspalumreúne más de 330 especies nativas americanas, que son de gran interés por su calidad forrajera y elamplio rango de adaptabilidad ecológica que presentan. Paraguay dispone de escasa informaciónsobre citología de procedencias nativas de especies del género. A fin de contribuir con la Caracterización de plantas nativas de Paraguay, se ha determinado el nivel de ploidía con técnicas citogenéticas y citometría de flujo de 24 individuos de 13 accesiones pertenecientes a ocho especies de Paspalum. Se realizaron colectas en los departamentos Canindeyú, Central, Cordillera, Paraguaríy Pte. Hayes. El 96% de las especies estudiadas presentó nivel de ploidía tetraploide. Las accesiones de P. almum (2n = 4x = 24), P. ionanthum, P. malacophyllum, P. notatum var. notatum, P. nicorae y P. plicatulum fueron todas tetraploides (2n = 4x = 40), en cambio se encontró ploidía pentaploide en P. arundinellum (2n = 5x = 50) y diploide en P. simplex (2n = 2x = 20).
The genus Paspalum comprises more than 330 native American species, which are of great interest due to their forage quality and the wide range of ecological adaptability. Paraguay has little information on the cytology of native species of the genus. In order to contribute to the characterization of native plants from Paraguay, the ploidy level of 24 individuals from 13 accessions belonging to eight Paspalum species has been determined using cytogenetic techniques and flow cytometry. The botanical collections were made in the Canindeyú, Central, Cordillera, Paraguarí, and Pte. Hayes departments. Most (96%) of the studied species were tetraploid. The accessions of P. almum (2n = 4x = 24), P. ionanthum, P. malacophyllum, P. notatum var. notatum, P. nicorae and P. plicatulum were tetraploids (2n = 4x = 40), whereas P. arundinellum was pentaploid (2n = 5x = 50) and P. simplex was diploid (2n = 2x = 20).
The genus Paspalum comprises more than 330 native American species, which are of great interest due to their forage quality and the wide range of ecological adaptability. Paraguay has little information on the cytology of native species of the genus. In order to contribute to the characterization of native plants from Paraguay, the ploidy level of 24 individuals from 13 accessions belonging to eight Paspalum species has been determined using cytogenetic techniques and flow cytometry. The botanical collections were made in the Canindeyú, Central, Cordillera, Paraguarí, and Pte. Hayes departments. Most (96%) of the studied species were tetraploid. The accessions of P. almum (2n = 4x = 24), P. ionanthum, P. malacophyllum, P. notatum var. notatum, P. nicorae and P. plicatulum were tetraploids (2n = 4x = 40), whereas P. arundinellum was pentaploid (2n = 5x = 50) and P. simplex was diploid (2n = 2x = 20).
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