Multi-locus phylogenetic analyses support the monophyly and the Miocene diversification of Iksookimia (Teleostei: Cypriniformes: Cobitidae)

Ye Seul Kwan, Daemin Kim, Myeong Hun Ko, Wan Ok Lee, Yong Jin Won

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The genus Iksookimia contains six species of primary freshwater fishes that are endemic to South Korea. Previous phylogenetic studies, based on DNA sequence data from three or fewer loci, have suggested non-monophyly of the genus, providing inconsistent resolutions of the relationships of Iksookimia. Our coalescent and concatenation-based phylogenetic analyses, utilizing seven unlinked nuclear-encoded genes, strongly supported Iksookimia as a monophyletic group, emphasizing the importance of multi-locus data in investigating complicated phylogenetic relationships. A relaxed molecular clock analysis using fossil calibrations, indicated that the origin of the major lineages of Iksookimia occurred between ∼12 to 5 Ma, which is consistent with the Miocene uplift of the Taebaek and Sobaek Mountains and the Miocene activation of the major south-eastern faults. These palaeogeographic events may have served as vicariant events in the diversification of Iksookimia.

Original languageEnglish
Pages (from-to)81-88
Number of pages8
JournalSystematics and Biodiversity
Volume16
Issue number1
DOIs
StatePublished - 2 Jan 2018

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Programs through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2010-0024578) and by the Ministry of Science, ICT and Future Planning (NRF-2015R1A2A2A01007117) to Y-JW.

Funding Information:
This research was supported by Basic Science Research Programs through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2010-0024578) and by the Ministry of Science, ICT and Future Planning (NRF-2015R1A2A2A01007117) to Y-JW. This study represents a chapter in Y-SK's dissertation, which was submitted in partial fulfilment of the PhD degree, awarded by the Division of EcoScience at the Ewha Womans University. We thank members of the Molecular Ecology Lab at the Ewha Womans University for their support. Comments from Thomas Near (Yale University), Andrew Simons (University of Minnesota), two anonymous reviewers and the Editor greatly improved the manuscript. Y-SK and Y-JW would like to send a special thank you to Sang-Don Lee, Yuseop Kim and Jongwoo Jung (Ewha Womans University) for their helpful advice during the study.

Publisher Copyright:
© 2017, © The Trustees of the Natural History Museum, London 2017. All Rights Reserved.

Keywords

  • Cobitoidea
  • Korean Peninsula
  • Korean fishes
  • allopatric speciation
  • divergence time estimation
  • freshwater fish
  • species-tree analysis
  • vicariance

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