Artículo
Inferences on the origins of polyploid Turnera species (Passifloraceae) based on molecular data
Fecha de publicación:
03/2013
Editorial:
National Research Council Canada-NRC Research Press
Revista:
Botany
ISSN:
1916-2790
e-ISSN:
1916-2804
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We explore the evolution of polyploids in subseries Turnera, testing hypotheses on their origins using DNA sequences (partial ndhF and trnT-L) from the plastid genome, as well as sequences of the nuclear ribosomal internal transcribed spacer (ITS). We construct phylogenies (with both Bayesian and maximum parsimony methods) using both the plastid and ITS sequences. We test hypotheses concerning the genome contributors to polyploids where previous cytogenetic studies had designated various diploid species as possessing A or C genomes and had proposed various genomic constitutions for the polyploids. Our analyses support the occurrence of a C genome clade of species and the origin of autooctoploid T. fernandezii Arbo from T. grandiflora (Urb.) Arbo (a C genome diploid). Nuclear ITS data support the hypothesis that T. concinna Arbo (an A genome species) contributed a genome to the segmental allotetraploid T. grandidentata (Urb.) Arbo, whereas analyses of ndhF and trnT-L sequences did not lead to identification of the plastid (or additional nuclear genome) donor. Our analyses support the origins of allooctoploids T. aurelii Arbo and T. cuneiformis Poir. from hexaploid T. orientalis (Urb.) Arbo. We found no evidence that hexaploid T. velutina Presl. possesses a C genome. We provide evidence, using Bayes factors, supporting the hypothesis that the segmental allohexaploids have had independent origins.
Palabras clave:
Cpdna
,
Its
,
Passifloraceae
,
Phylogeny
,
Polyploidy
,
Turnera
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Identificadores
Colecciones
Articulos(IBODA)
Articulos de INST.DE BOTANICA DARWINION (I)
Articulos de INST.DE BOTANICA DARWINION (I)
Citación
López, Alicia; Fernandez, Aveliano; Shore, Joel S.; Inferences on the origins of polyploid Turnera species (Passifloraceae) based on molecular data; National Research Council Canada-NRC Research Press; Botany; 91; 3; 3-2013; 167-175
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