CiteULike CiteULike
Delicious Delicious
Connotea Connotea

Citation for Study 10423

About Citation title: "Biogeography of the T?ngara Frog, Physalaemus pustulosus: a Molecular Perspective.".
About Study name: "Biogeography of the T?ngara Frog, Physalaemus pustulosus: a Molecular Perspective.".
About This study is part of submission 10413 (Status: Published).

Citation

Weigt L.A., Crawford A., Rand A., & Ryan M. 2005. Biogeography of the T?ngara Frog, Physalaemus pustulosus: a Molecular Perspective. Molecular Ecology, 14: 3857-3876.

Authors

  • Weigt L.A.
  • Crawford A.
  • Rand A.
  • Ryan M.

Abstract

Physalaemus pustulosus, a small leptodactylid frog with South American affinities, ranges across northern South America through Middle America to southern Mexico. To investi- gate its geographic variation and evolutionary origins, we analysed the presumptive gene products of 14 allozyme loci and sequenced a portion of the mitochondrial COI gene from individuals sampled throughout the distribution. Generally, allozyme dissimilarities and sequence divergences are correlated with each other and with geographic proximity. The greatest discontinuity in genetic variation was found between populations in Middle America vs. South America + Panama. Based on two Bayesian MCMC (Markov chain Monte Carlo) divergence time estimates involving two independent temporal constraints, the timing of the separation of northern and southern t?ngara frog lineages is significantly older than the time since completion of the current Panama land bridge. P. pustulosus first invaded Middle America from South America about 6?10 million years ago giving rise to the northern lineage. The southern lineage then invaded Panama independently after land bridge comple- tion. Despite millions of years of independent evolution, the multilocus allozyme data revealed that western Panama populations represent a contact zone containing individuals with alleles from both groups present.

Keywords

allozymes, biogeography, intergradation, mtDNA

External links

About this resource

  • Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S10423
  • Other versions: Download Reconstructed NEXUS File Nexus Download NeXML File NeXML
  • Show BibTeX reference
  • Show RIS reference