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Genetic divergence between two forms of a tongue sole Cynoglossus interruptus

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Abstract

Genetic differences between trilinear and dilinear forms of a tongue sole, Cynoglossus interruptus, were examined by use of isozymes. Unequivocal differences were detected between the two forms, including complete replacement of alleles at the FBALD-2*, MDH-3*, PROT-1*, and SOD-1* loci, almost complete replacement at the AAT-3*, AH-1*, AH-2*, EST-3*, G3PDH-3*, GPI-2*, IDHP-1*, and MDH-1* loci, and extreme differences in allelic frequencies at the GPI-1* and PGDH* loci. The genetic distances (D values) between the two forms were 0.4207–0.4353, figures predicatively significant at the specific level. The considerable genetic differences strongly suggested that the two forms represent distinct species.

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Acknowledgments

The present study was initially motivated by information from Mr. Takaaki Shimizu (Ehime Prefectural Chuyo Fisheries Experimental Station). The captain and crews of R/V Kotaka-maru (the National Research Institute of Fisheries), the captain of Shachi-maru II, a chartered trawling boat, and Dr. Gen Kume [Faculty of Agriculture, Tokyo University (present address: Faculty of Fisheries, Nagasaki University)], assisted us in collecting some specimens used in the present study. Mr. Koki Mizuno (Uwajima Fisheries High School) provided some literature. Finally, we wish to thank Dr. Graham S. Hardy (Whangarei, New Zealand) for checking the manuscript.

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Authors and Affiliations

  1. 13-5 Higashihama, Tadotsu-cho, Nakatado-gun, Kagawa, 764-0016, Japan

    Kōji Yokogawa

  2. National Research Institute of Fisheries Science, Fisheries Research Agency, 2-12-4 Fukuura, Kanazawa, Yokohama, Kanagawa, 236-8648, Japan

    Hideo Sakaji

  3. Laboratory of Marine Biology, Faculty of Science, Kochi University, 2-5-1 Akebono-cho, Kochi, 780-8520, Japan

    Hiromitsu Endo

  4. Division of Marine Biology and Dynamics, Faculty of Fisheries, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan

    Atsuko Yamaguchi

Authors
  1. Kōji Yokogawa
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  2. Hideo Sakaji
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  3. Hiromitsu Endo
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  4. Atsuko Yamaguchi
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Corresponding author

Correspondence to Kōji Yokogawa.

Electronic supplementary material

Selected electrophoretograms in dilinear and trilinear forms of Cynoglossus “interruptus” (Fig. S1) are available as Supplementary material.

10228_2007_2_Fig1_ESM.jpg

Fig. S1. Selected electrophoretograms of significant loci in Cynoglossus “interruptus.” Uppercase letters following enzyme or protein name abbreviation indicate tissue; arrows indicate origins of electrophoresis. L, liver; M, muscle (JPEG 212 kb)

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Yokogawa, K., Sakaji, H., Endo, H. et al. Genetic divergence between two forms of a tongue sole Cynoglossus interruptus . Ichthyol Res 55, 78–81 (2008). https://doi.org/10.1007/s10228-007-0002-5

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  • DOI: https://doi.org/10.1007/s10228-007-0002-5

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