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Mitochondrial DNA data unveil highly divergent populations within the genus Hynobius (Caudata: Hynobiidae) in South Korea. | LitMetric

Mitochondrial DNA data unveil highly divergent populations within the genus Hynobius (Caudata: Hynobiidae) in South Korea.

Mol Cells

Conservation Genome Resource Bank for Korean Wildlife (CGRB), Veterinary Science College of Veterinary Medicine, Seoul National University, Seoul, Korea.

Published: February 2011

AI Article Synopsis

  • * Researchers identified 89 haplotypes in the cytochrome b gene and 36 haplotypes in 12S rRNA, revealing six distinct subclades, including three that are different from the known species.
  • * The findings suggest that there may be more diverse populations than previously recognized, with divergence occurring around 9-5 million years ago, indicating a need for further genetic and ecological research to refine the classification.

Article Abstract

Korean salamanders of the genus Hynobius are currently classified into 3 species, H. leechii, H. quelpaertensis, and H. yangi. To investigate the phylogenetic relationship of these species, we analyzed the partial sequence of mitochondrial cytochrome b gene (907 bp) of 197 specimens from 43 regions in South Korea. Of these specimens, 93 were additionally examined with 12S rRNA (799 bp). Based on the partial sequence of the mitochondrial cytochrome b gene and 12S rRNA, 89 and 36 haplotypes were defined, respectively, consisting of six subclades (H. leechii, H. quelpaertensis, H. yangi, HC1, HC2, and HC3). Among these subclades, the three subclades (HC1, HC2, and HC3) were clearly separated from the 3 previously reported species in the genus Hynobius. Pairwise sequence divergence between the six subclades ranged from 6.3 to 11.2% in cytochrome b gene and 2.0 to 4.3% in 12S rRNA. These results indicate there may be more divergent populations than the three currently described. Moreover, the estimation of divergence time revealed that the Hynobius species in South Korea diverged during the Miocene epoch, approximately 9 - 5 MYA. In addition, we confirmed the distribution of the three known species (H. leechii, H. quelpaertensis, and H. yangi) and determined the distributions of new, distinct groups (or subclades; HC1, HC1, and HC3). To more accurately establish the taxonomic status and population structure, further genetic, morphological, and ecological studies will be needed.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3932678PMC
http://dx.doi.org/10.1007/s10059-011-0014-xDOI Listing

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