A multilocus perspective on the speciation history of a North American aridland toad (Anaxyrus punctatus).
Mol Phylogenet Evol
; 64(3): 393-400, 2012 Sep.
Article
de En
| MEDLINE
| ID: mdl-22579923
ABSTRACT
Interpretations of phylogeographic patterns can change when analyses shift from single gene-tree to multilocus coalescent analyses. Using multilocus coalescent approaches, a species tree and divergence times can be estimated from a set of gene trees while accounting for gene-tree stochasticity. We utilized the conceptual strengths of a multilocus coalescent approach coupled with complete range-wide sampling to examine the speciation history of a broadly distributed, North American warm-desert toad, Anaxyrus punctatus. Phylogenetic analyses provided strong support for three major lineages within A. punctatus. Each lineage broadly corresponded to one of three desert regions. Early speciation in A. punctatus appeared linked to late Miocene-Pliocene development of the Baja California peninsula. This event was likely followed by a Pleistocene divergence associated with the separation of the Chihuahuan and Sonoran Deserts. Our multilocus coalescent-based reconstruction provides an informative contrast to previous single gene-tree estimates of the evolutionary history of A. punctatus.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Phylogenèse
/
Bufonidae
/
Spéciation génétique
Limites:
Animals
Pays/Région comme sujet:
Mexico
Langue:
En
Journal:
Mol Phylogenet Evol
Sujet du journal:
BIOLOGIA
/
BIOLOGIA MOLECULAR
Année:
2012
Type de document:
Article
Pays d'affiliation:
États-Unis d'Amérique