Studies on molecular mechanisms of sex differentiation, oocyte maturation and ovulation in sturgeons

2020 Fiscal Year Final Research Report

• Project/Area Number: 17H03866
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Aquatic life science
• Research Institution: Hokkaido University
• Principal Investigator: Adachi Shinji 北海道大学, 水産科学研究院, 特任教授 (40231930)
• Co-Investigator(Kenkyū-buntansha): 井尻 成保 北海道大学, 水産科学研究院, 准教授 (90425421)
• Project Period (FY): 2017-04-01 – 2021-03-31
• Keywords: チョウザメ / 性分化 / 性統御 / 卵成熟 / 排卵 / 卵質

Outline of Final Research Achievements

Factors involved in sex differentiation and oocyte maturation / ovulation were analyzed using the Next Generation Sequencer (NGS) to promote the elucidation of molecular mechanisms of reproductive phenomena in sturgeon. Based on the analysis of a large number of molecular markers in each stage, we advanced establishment of techniques for early sexing, high quality egg production and all-female production. From the results of the present study, it will be possible to produce all-female sturgeon without hormone treatments in near future.

Free Research Field

魚類繁殖生理学

Academic Significance and Societal Importance of the Research Achievements

チョウザメの性分化と卵形成の分子機構の解明が進むことで、全雌生産、早期性判別、早期成熟および安定的良質卵生産技術が改善される。効率的チョウザメ養殖と安定的キャビア生産技術の確立は大きな産業振興に繋がる。また、チョウザメ養殖の拡大により、絶滅が危惧されている多くのチョウザメ類の資源保護にも貢献できる。