Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Karyotype Analysis of an Endemic Korean Torrent Catfish Liobagrus hyeongsanensis(Siluriformes: Amblycipitidae)

한국 퉁가리속 고유종 동방자가사리 Liobagrus hyeongsanensis의 핵형 분석

  • Cho, Yun Jeong (Department of Biological Sciences and Institute for Biodiversity Research, College of Natural Sciences, Chonbuk National University) ;
  • Park, Jong Young (Department of Biological Sciences and Institute for Biodiversity Research, College of Natural Sciences, Chonbuk National University)
  • 조윤정 (전북대학교 자연과학대학 생물학과, 전북대학교 생물다양성연구소) ;
  • 박종영 (전북대학교 자연과학대학 생물학과, 전북대학교 생물다양성연구소)
  • Received : 2017.05.25
  • Accepted : 2017.06.15
  • Published : 2017.06.30
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Abstract

For the karyotype analysis of Liobagrus hyeongsanensis, an endemic Korean torrent catfish, ten females and five males were used from Yangbuk-myeon, Gyeongju-si, Gyeongsangbukdo, Korea. The diploid number of chromosomes was 42, and its karyotype consisted of 30 metacentrics and 12 submetacentrics; 84 FN (fundamental number), with having no polyploidy and sexual dimorphism. The chromosome number was the same as other closely-related species, L. mediadiposalis and L. somjinensis, but their karyotypes showed a clear difference by species. Such result may be related to chromosomal rearrangements by Robertsonian rearrangement with geographical isolation.

최근 신종으로 발표된 동방자가사리 Liobagrus hyeongsanensis의 핵형 분석을 위해 경상북도 경주시 양북면 일대에서 암컷 10마리와 수컷 5마리를 채집하였다. 동방자가사리의 염색체 수는 2n=42이었으며, 핵형은 30개의 중부염색체와 12개의 차중부염색체로 구성되어 있었다. FN 값은 84였으며, 암수 간 성적이형과 배수체는 관찰되지 않았다. 동방자가사리는 퉁가리속의 자가사리, 섬진자가사리와 염색체 수는 같았으나 핵형에서 차이를 보였다. 이러한 핵형의 차이는 지리적 격리로 인한 로버트슨 전좌(Robertsonian rearrangement)와 관련 있는 것으로 생각된다.

Keywords

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