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Karyotype of an Endangered Freshwater Fish, Microphysogobio koreensis (Pisces: Cyprinidae) from Korea  

Park, Jong Sung (Inland Aquaculture Research Center, National Institute of Fisheries Science)
Kim, Hyeong Su (Inland Aquaculture Research Center, National Institute of Fisheries Science)
Park, Jong Young (Department of Biological Science and Institute for Biodiversity Research, College of Natural Sciences, Chonbuk National University)
Publication Information
Korean Journal of Ichthyology / v.30, no.2, 2018 , pp. 71-74 More about this Journal
Abstract
The karyotype analysis of an endangered freshwater fish, Microphysogobio koreensis, was performed to obtain basic data for phylogenetic information. To carry out our study, 4 specimens were collected in Seomjingang River and Nakdongang River and its kidney was treated by flame-drying method. The chromosome number of this species demonstrated 50 diploid chromosomes, with two populations of M. koreensis not significantly different. The karyotype revealed 2n=26m+24sm, consisting of 26 metacentric (m) and 24 submetacentric (sm) chromosomes with the total fundamental arm number determined as FN=100. Total arm length and arm ratio of the chromosomes were $1.44{\sim}2.68{\mu}m$ and 1.27~2.27, respectively. The karyotype of M. koreensis was first reported in this study.
Keywords
Microphysogobio koreensis; chromosome; karyotype; endangered freshwater fish;
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