Skewed genetic sex ratio in reciprocal hybrids between pink salmon and masu salmon

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  • SHIMA FUMIKA
    Laboratory of Aquaculture Genetics and Genomics, Division of Marine Life Science, Faculty and Graduate School of Fisheries Sciences, Hokkaido University
  • ASANUMA REI
    Laboratory of Aquaculture Genetics and Genomics, Division of Marine Life Science, Faculty and Graduate School of Fisheries Sciences, Hokkaido University
  • KANEYASU TAKAHISA
    Laboratory of Aquaculture Genetics and Genomics, Division of Marine Life Science, Faculty and Graduate School of Fisheries Sciences, Hokkaido University
  • ICHIMURA MASAKI
    Shibetsu Salmon Museum
  • TAKAHASHI EISUKE
    Nanae Fresh-Water Station, Field Science Center for Northern Biosphere, Hokkaido University
  • YAMAHA ETSURO
    Nanae Fresh-Water Station, Field Science Center for Northern Biosphere, Hokkaido University
  • FUJIMOTO TAKAFUMI
    Laboratory of Aquaculture Genetics and Genomics, Division of Marine Life Science, Faculty and Graduate School of Fisheries Sciences, Hokkaido University
  • ARAI KATSUTOSHI
    Laboratory of Aquaculture Genetics and Genomics, Division of Marine Life Science, Faculty and Graduate School of Fisheries Sciences, Hokkaido University

Bibliographic Information

Other Title
  • カラフトマスとサクラマス間の正逆雑種における遺伝的性の偏り
  • カラフトマス ト サクラマス カン ノ セイ ギャクザッシュ ニ オケル イデンテキセイ ノ カタヨリ

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Abstract

<p>　Skewed sex ratio has often been observed in hybrids, but the sex was always determined by gonadal phenotypes. Here, we artificially induced reciprocal hybrids between pink salmon and masu salmon and then examined the genetic sex ratio in the hybrids based on the presence or absence of the sex-determining gene sdY. As a result, the sex of 8-month-old hybrids between pink salmon female×masu salmon male and masu salmon female×pink salmon male skewed to female, while 12-month-old hybrids between masu salmon female×pink salmon male were exclusively male. Since the sex ratio between the early embryos and hatching alevin was 1:1, it was considered that the skewed sex ratio was due to the difference of survival rate between genetic males and females.</p>

Journal

  • NIPPON SUISAN GAKKAISHI

    NIPPON SUISAN GAKKAISHI 87 (5), 473-482, 2021-09-15

    The Japanese Society of Fisheries Science

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