Partial Genetic Compatibility and Unidirectional Hybridization in Syntopic Populations of the Salamanders Desmognathus fuscus and D. ochrophaeus

Sharbel, Timothy F.; Bonin, Joël; Lowcock, Leslie A.; Green, David M.

doi:10.2307/1446911

Copeia

1995

DOI: 10.2307/1446911

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Partial Genetic Compatibility and Unidirectional Hybridization in Syntopic Populations of the Salamanders Desmognathus fuscus and D. ochrophaeus

Timothy F. Sharbel¹,

Joël Bonin²,

Leslie A. Lowcock³

et al.

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Cited by 4 publications

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“…Complete sexual isolation has been observed between multiple pairs of sympatric species of plethodontids, but pre-and post-zygotic barriers can be leaky (Mabry and Verrell, 2004;Tilley, 2016). For example, in situ hybridization has been documented between Northern (D. fuscus) and Allegheny Mountain Dusky (D. ochrophaeus) salamanders (Karlin and Guttman, 1981;Sharbel et al, 1995). Fewer studies examining sexual isolation have been undertaken for taxa which occur in the Gulf Coastal Plain (Verrell, 1990a;Kozak, 2003;Mabry and Verrell, 2004).…”

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confidence: 99%

Sexual Isolation between Two Sympatric Desmognathus in the Gulf Coastal Plain

Lamb¹

2017

Copeia

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confidence: 99%

Sexual Isolation between Two Sympatric Desmognathus in the Gulf Coastal Plain

Lamb¹

2017

Copeia

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Assessing DNA Barcodes for Species Identification in North American Reptiles and Amphibians in Natural History Collections

Chambers

Hebert

2016

PLoS ONE

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BackgroundHigh rates of species discovery and loss have led to the urgent need for more rapid assessment of species diversity in the herpetofauna. DNA barcoding allows for the preliminary identification of species based on sequence divergence. Prior DNA barcoding work on reptiles and amphibians has revealed higher biodiversity counts than previously estimated due to cases of cryptic and undiscovered species. Past studies have provided DNA barcodes for just 14% of the North American herpetofauna, revealing the need for expanded coverage.Methodology/Principal FindingsThis study extends the DNA barcode reference library for North American herpetofauna, assesses the utility of this approach in aiding species delimitation, and examines the correspondence between current species boundaries and sequence clusters designated by the BIN system. Sequences were obtained from 730 specimens, representing 274 species (43%) from the North American herpetofauna. Mean intraspecific divergences were 1% and 3%, while average congeneric sequence divergences were 16% and 14% in amphibians and reptiles, respectively. BIN assignments corresponded with current species boundaries in 79% of amphibians, 100% of turtles, and 60% of squamates. Deep divergences (>2%) were noted in 35% of squamate and 16% of amphibian species, and low divergences (<2%) occurred in 12% of reptiles and 23% of amphibians, patterns reflected in BIN assignments. Sequence recovery declined with specimen age, and variation in recovery success was noted among collections. Within collections, barcodes effectively flagged seven mislabeled tissues, and barcode fragments were recovered from five formalin-fixed specimens.Conclusions/SignificanceThis study demonstrates that DNA barcodes can effectively flag errors in museum collections, while BIN splits and merges reveal taxa belonging to deeply diverged or hybridizing lineages. This study is the first effort to compile a reference library of DNA barcodes for herpetofauna on a continental scale.

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Comprehensive Analysis of Salamander Hybridization Suggests a Consistent Relationship between Genetic Distance and Reproductive Isolation across Tetrapods

Melander

Mueller

2020

Copeia

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Partial Genetic Compatibility and Unidirectional Hybridization in Syntopic Populations of the Salamanders Desmognathus fuscus and D. ochrophaeus

Cited by 4 publications

References 0 publications

Sexual Isolation between Two Sympatric Desmognathus in the Gulf Coastal Plain

Sexual Isolation between Two Sympatric Desmognathus in the Gulf Coastal Plain

Assessing DNA Barcodes for Species Identification in North American Reptiles and Amphibians in Natural History Collections

Comprehensive Analysis of Salamander Hybridization Suggests a Consistent Relationship between Genetic Distance and Reproductive Isolation across Tetrapods

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