Blog de la Red de Biodiversidad y Sistemática en el INECOL

En este espacio público, los investigadores, técnicos y estudiantes del INECOL queremos difundir nuestras actividades y promover la divulgación del conocimiento sobre la biodiversidad y sistemática.
Xalapa, Ver. México. Junio 2008.

29 agosto, 2009

Molecular phylogeny of the Acre clade (Crassulaceae): dealing with the lack of definitions for Echeveria and Sedum.




Molecular Phylogenetics and Evolution 53(1):267-276. Octubre 2009.

Carrillo-Reyes, Pablo1; Sosa, Victoria2; Mort, Mark E.3
1: Departamento de Biología Evolutiva, Instituto de Ecología, A.C. Apartado Postal 63, 91070 Xalapa, Veracruz, Mexico; Email: pcarreyes@gmail.com 2: Departamento de Biología Evolutiva, Instituto de Ecología, A.C. Apartado Postal 63, 91070 Xalapa, Veracruz, Mexico;, Email: victoria.sosa@inecol.edu.mx 3: Department of Ecology and Evolutionary Biology and the Natural History Museum and Biodiversity Research Center, University of Kansas, 1200 Sunnyside Ave., Lawrence, Kansas 66045, U.S.A.

ABSTRACT: The phylogenetic relationships within many clades of the Crassulaceae are still uncertain, therefore in this study attention was focused on the "Acre clade", a group comprised of approximately 526 species in eight genera that include many Asian and Mediterranean species of Sedum and the majority of the American genera (Echeveria, Graptopetalum, Lenophyllum, Pachyphytum, Villadia, and Thompsonella). Parsimony and Bayesian analyses were conducted with 133 species based on nuclear (ETS, ITS) and chloroplast DNA regions (rpS16, matK). Our analyses retrieved four major clades within the Acre clade. Two of these were in a grade and corresponded to Asian species of Sedum, the rest corresponded to a European-Macaronesian group and to an American group. The American group included all taxa that were formerly placed in the Echeverioideae and the majority of the American Sedoideae. Our analyses support the monophyly of three genera--Lenophyllum, Thompsonella, and Pachyphytum; however, the relationships among Echeveria, Sedum and the various segregates of Sedum are largely unresolved. Our analyses represents the first broad phylogenetic framework for Acre clade, but further studies are necessary on the groups poorly represented here, such as the European and Asian species of Sedum and the Central and South American species of Echeveria.

No hay comentarios:

Publicar un comentario

Lo más visto en el blog de la Red de Biodiversidad y Sistemática

Reciba avisos de nuevo contenido

Ingrese su correo electrónico:

...o subscribase mediante agregadores web de avisos

en formato RSS