Induction of Female-to-Male Sex Reversal by High Temperature Treatment in Medaka, Oryzias latipes(SHORT COMMUNICATION,Developmental Biology)

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概要

• 論文の詳細を見る

• Medaka, Oryzias latipes, has a firm XX-XY sex-determining system with the sex-determining gene, DM on the Y chromosome. However, previous studies have suggested that high water temperature might affect sex determination in Medaka. In the present study, the influence of high water temperature on sex reversal was examined. Fertilized eggs of two inbred strains of Medaka were developed at high water temperature (32℃) until hatching. The hatched fry were kept at normal water temperatures (27℃) until adulthood, and the phenotypic and genotypic sex was examined. As a result, 24% (N=105) and 50% (N=36) of XX fish developed a male phenotype in the Hd-rR and HNI inbred strains, respectively. These XX sex-reversed males had a normal testis and were fully fertile. On the other hand, all XY fish were male in the both strains. These results demonstrate that high water temperatures can induce XX sex reversal and that elevated water temperatures during the embryonic stage is a simple and useful method for getting XX males in Medaka.

• 2005-09-25

著者

• SATO Tadashi

  Department of Environmental Science, Faculty of Science, Niigata University

• SAKAIZUMI Mitsuru

  Department of Environmental Science, Faculty of Science, Niigata University

• 浜口 智志

  大阪大学大学院工学研究科原子分子イオン制御理工学センター

• Hamaguchi Satoshi

  Department of Biology, College of General Education, Niigata University

• Sato Torao

  Misaki Marine Biological Station Graduate School Of Science University Of Tokyo

• Sato T

  Department Of Physiology Nagasaki University School Of Dentistry

• Sakaizumi Mitsuru

  Graduate School of Science and Technology, Niigata University

• Hamaguchi Satoshi

  Niigata Univ. Niigata Jpn

• Hamaguchi S

  Niigata Univ. Niigata Jpn

• Hamaguchi Satoshi

  Environmental Science And Technology Graduate School Of Science And Technology Niigata University

• Hamaguchi S.

  Dept. Of Environ. Sci. Fac. Of Sci. Niigata Univ.

• Sakaizumi M

  Dep. Of Environmental Sci. Fac. Of Sci. Niigata Univ.

• Sakaizumi Mitsuru

  Environmental Science And Technology Graduate School Of Science And Technology Niigata University

• Sakaizumi Mitsuru

  Graduate School Of Science And Technology Niigata University:department Of Environmental Science Fac

• Sakaizumi Mitsuru

  Department Of Biology College Of General Education Niigata University

• Hamaguchi Satoshi

  Department Of Biology College Of General Education Niigata University

• Yamahira Kazunori

  Department of Environmental Science, Faculty of Science, Niigata University

• Endo Tomokazu

  Department Of Environmental Science Faculty Of Science Niigata University

• Yamahira Kazunori

  Department Of Environmental Science Faculty Of Science Niigata University

• Sato Tadashi

  Department Of Environmental Science Faculty Of Science Niigata University

• Sato Tadashi

  Department Of Biochemistry Research Laboratory Of Applied Biochemistry Tanabe Seiyaku Co. Ltd.

• Sato Tadashi

  Department Of Applied Chemistry Faculty Of Science And Engineering Waseda Uiversity

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