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- Title
Molecular patterns of differentiation in canyon treefrogs ( Hyla arenicolor): evidence for introgressive hybridization with the Arizona treefrog ( H. wrightorum) and correlations with advertisement call differences.
- Authors
KLYMUS, K. E.; HUMFELD, S. C.; MARSHALL, V. T.; CANNATELLA, D.; GERHARDT, H. C.
- Abstract
Detection of genetic and behavioural diversity within morphologically similar species has led to the discovery of cryptic species complexes. We tested the hypothesis that US populations of the canyon treefrog ( Hyla arenicolor) may consist of cryptic species by examining mate-attraction signals among three divergent clades defined by mtDNA. Using a multi-locus approach, we re-analysed phylogenetic relationships among the three clades and a closely related, but morphologically and behaviourally dissimilar species, the Arizona treefrog ( H. wrightorum). We found evidence for introgression of H. wrightorum’s mitochondrial genome into H. arenicolor. Additionally, the two-clade topology based on nuclear data is more congruent with patterns of call variation than the three-clade topology from the mitochondrial dataset. The magnitude of the call divergence is probably insufficient to promote isolation of the nuclear DNA-defined clades should they become sympatric, but further divergence in call properties significant in species identification could promote speciation in the future.
- Subjects
HYLIDAE; SPECIES hybridization; BIOLOGICAL divergence; NUCLEIC acids; LOCUS (Genetics)
- Publication
Journal of Evolutionary Biology, 2010, Vol 23, Issue 7, p1425
- ISSN
1010-061X
- Publication type
Article
- DOI
10.1111/j.1420-9101.2010.02008.x