English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/143892
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

Genomic architecture of phenotypic divergence between two hybridizing plant species along an elevational gradient

AutorBrennan, Adrian C. ; Hiscock, Simon J.; Abbott, Richard J.
Palabras claveGenetic differentiation
Hibrydization
Phenotypic divergence
QTL architecture
QTL interactions
Selection
Speciation
Fecha de publicación2016
EditorOxford University Press
CitaciónAOB Plants, 8 art. plw. 022 (2016)
ResumenKnowledge of the genetic basis of phenotypic divergence between species and how such divergence is caused and maintained is crucial to an understanding of speciation and the generation of biodiversity. The hybrid zone between Senecio aethnensis and S. chrysanthemifolius on Mount Etna, Sicily, provides a well-studied example of species divergence in response to conditions at different elevations, despite hybridization and gene flow. Here, we investigate the genetic architecture of divergence between these two species using a combination of quantitative trait locus (QTL)mapping and genetic differentiation measures based on geneticmarker analysis. A QTL architecture characterized by physical QTL clustering, epistatic interactions between QTLs, and pleiotropy was identified, and is consistent with the presence of divergent QTL complexes resistant to gene flow. A role for divergent selection between species was indicated by significant negative associations between levels of interspecific genetic differentiation at mapped marker gene loci and map distance from QTLs and hybrid incompatibility loci. Within-species selection contributing to interspecific differentiation was evidenced by negative associations between interspecific genetic differentiation and genetic diversity within species. These results show that the two Senecio species, while subject to gene flow, maintain divergent genomic regions consistent with local selection within species and selection against hybrids between species which, in turn, contribute to the maintenance of their distinct phenotypic differences
Versión del editorhttp://dx.doi.org/10.1093/aobpla/plw022
URIhttp://hdl.handle.net/10261/143892
DOI10.1093/aobpla/plw022
Aparece en las colecciones: (EBD) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Abbot (et al,).pdf592,31 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.