Artículo
Natural hybridization among subspecies of Turnera sidoides L. (Passifloraceae) revealed by morphological and genetic evidence
Moreno, Ercilia Maria Sara
; Speranza, Pablo; Roggero Luque, Juan Manuel
; Solis Neffa, Viviana Griselda
Fecha de publicación:
08/2014
Editorial:
Springer Wien
Revista:
Plant Systematics and Evolution
ISSN:
0378-2697
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Turnera sidoides is a complex of outcrossing, perennial, rhizomatous herbs that is widely distributed in southern South America. Five subspecies are recognized taxonomically based on morphological features and geographical distribution. In certain regions, the areas of distribution of the subspecies overlap partially. In such contact zones, the extent of reproductive barriers among subspecies is still largely unknown, but morphologically intermediate individuals have been found in the field, indicating that hybridization may actually occur between subspecies. Crossability among subspecies of T. sidoides has been shown by experimental studies with cultivated plants, but the mechanisms involved in natural populations are still unknown. To investigate the mechanisms that underlie gene flow within the T. sidoides complex, in this paper we analyze the morphological and genetic variation, as well as the crossability among taxa in a contact zone between subspecies pinnatifida and sidoides, in southeastern Uruguay. Our results constitute the first evidences of ongoing natural hybridization between subspecies of T. sidoides and suggest that, although hybridization may not have been of significance in the early phase of the species differentiation, reticulate evolution is ongoing enhancing the current morphological and genetic variability of the complex.
Palabras clave:
Gene Flow
,
Hybridization
,
Rapd
,
Turnera Sidoides
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IBONE)
Articulos de INST.DE BOTANICA DEL NORDESTE (I)
Articulos de INST.DE BOTANICA DEL NORDESTE (I)
Citación
Moreno, Ercilia Maria Sara; Speranza, Pablo; Roggero Luque, Juan Manuel; Solis Neffa, Viviana Griselda; Natural hybridization among subspecies of Turnera sidoides L. (Passifloraceae) revealed by morphological and genetic evidence; Springer Wien; Plant Systematics and Evolution; 301; 3; 8-2014; 883-892
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