Abstract
Background
The Korean Peninsula is a small but unique area showing great endemic Hynobius diversity with H. quelpaertensis, H. yangi, H. unisacculus and three species candidates (HC1, HC3 and HC4). H. quelpaertensis is distributed in the southern part and in Jeju Island, while the remaining species have extremely narrow distributions.
Objectives
To examine the genetic structure of H. quelpaertensis and the phylogenetic placement in Hynobius.
Methods
Three mitochondrial and six microsatellite loci were genotyped for 204 Hynobius quelpaertensis, three H. leechii, three H. yangi, three HC1, two H. unisacculus, three HC3, three HC4 and ten Japanses H. lichenatus.
Results
A high level of mitochondrial diversity was found in H. quelpaertensis. Our mitochondrial data showed evidence of a historical link between inland and Jeju Island despite the signature of founder effect likely experienced by the early island populations. However, our microsatellite analysis showed the fairly clear signature of isolation history between in- and island populations. Upon phylogenetic analysis, H. quelpaertensis, H. unisacculus and HC1 formed a cluster, whereas H. yangi belonged to a separate cluster. HC3 and HC4 were clustered with either H. quelpaertensis or H. yangi depending on the locus used.
Conclusion
Our results show at least partially the historical imprints engraved by dispersal of Korean endemic Hynobius during Pleistocene, potentially providing a fundamental basis in determining the conservation units and finding management strategies for these species.
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Acknowledgements
We thank HT Kim and YM Go for providing field assistance.
Funding
This research was performed with the support of the grants from the National Research Foundation of Korea (Grant no. NRF-2016R1D1A1B03934071) and from the National Institute of Biological Resources, Ministry of Environment (Grant no. NIBR201403201).
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Suk, H.Y., Bae, HG., Kim, DY. et al. Genetic and phylogenetic structure of Hynobius quelpaertensis, an endangered endemic salamander species on the Korean Peninsula. Genes Genom 42, 165–178 (2020). https://doi.org/10.1007/s13258-019-00886-8
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DOI: https://doi.org/10.1007/s13258-019-00886-8