Speciation by Polyploidy in Treefrogs: Multiple Origins of the Tetraploid, Hyla versicolor

Speciation by polyploidy is rare in animals, yet, in vertebrates, there is a disproportionate concentration of polyploid species in anuran amphibians. Sequences from the cytochrome b gene of the mitochondrial DNA (mtDNA) were used to determine phylogenetic relationships among 37 populations of the d...

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Bibliographic Details
Published in:Evolution 1994-06, Vol.48 (3), p.898-908
Main Authors: Ptacek, Margaret B., Gerhardt, H. Carl, Sage, Richard D.
Format: Article
Language:English
Subjects:
Amphibian
Amphibians
Anura
Biological taxonomies
Diploidy
Evolution
Evolutionary genetics
Frogs
Genetic aspects
Genetics
Haplotypes
Hyla
Hyla chrysoscelis
Hyla versicolor
Hyla versicolor complex
Mitochondrial DNA
Phylogeny
Polyploidy
Reptiles & amphibians
speciation
Tetraploidy
tree frogs
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Summary:Speciation by polyploidy is rare in animals, yet, in vertebrates, there is a disproportionate concentration of polyploid species in anuran amphibians. Sequences from the cytochrome b gene of the mitochondrial DNA (mtDNA) were used to determine phylogenetic relationships among 37 populations of the diploid-tetraploid species pair of gray treefrogs, Hyla chrysoscelis and Hyla versicolor. The diploid species, H. chrysoscelis, consists of an eastern and a western lineage that have 2.3% sequence divergence between them. The tetraploid species, H. versicolor, had at least three separate, independent origins. Two of the tetraploid lineages are more closely related to one or the other of the diploid lineages (0.18%-1.4% sequence divergence) than they are to each other (1.9%-3.4% sequence divergence). The maternal ancestor of the third tetraploid lineage is unknown. The phylogenetic relationships between the two species and among lineages within each species support the hypothesis of multiple origins of the tetraploid lineages.
ISSN:0014-3820
1558-5646
DOI:10.1111/j.1558-5646.1994.tb01370.x