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Molecular evolution of seminal plasma protein in Tanganyikan cichlids

Research Project

Project/Area Number 25840130
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Evolutionary biology
Research InstitutionUniversity of the Ryukyus

Principal Investigator

MORITA Masaya  琉球大学, 熱帯生物圏研究センター, 准教授 (80535302)

Project Period (FY) 2013-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords受精 / 生殖行動 / 精しょうタンパク質 / 分子進化 / 精子競争 / シクリッド / 種分化 / 産卵行動 / 精子
Outline of Final Research Achievements

Tanganyikan cichlids show variety rich reproductive behavior and also distinctive fertilization manners. Those fertilization manners were categorized into 3 types, oral fertilization, substrate fertilization, and stocked-sperm fertilization. Among those manners, only oral fertilization manner favors aggregation and immobilization of sperm. The seminal plasma protein 120 named SPP120 is suggested to function as a immobilization and aggregation of sperm. In this project, I investigated the relationship between fertilization manners and evolution of SPP120 in terms of molecular sequence evolution and glycosylation. The expressed SPP120 immobilized sperm motility and aggregated sperm. Furthermore, glycosylation enhanced aggregation of sperm via increase in viscosity of semen and PGLS analyses suggested the evolutionary correlation with oral fertilization manner. Those results indicated that SPP120 evolved in response to the changes in fertilization manners.

Report

(3 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • Research Products

    (3 results)

All 2014 2013

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Acknowledgement Compliant: 1 results) Presentation (1 results)

  • [Journal Article] Bower-building behaviour is associated with increased sperm longevity in Tanganyikan cichlids.2014

    • Author(s)
      Morita, M., Awata, S., Yorifuji, M., Ota, K., Kohda, M. & Ochi, H.
    • Journal Title

      Journal of Evolutionary Biology

      Volume: 27 Issue: 12 Pages: 2629-2643

    • DOI

      10.1111/jeb.12522

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Sneaker males are not necessarily similar to females in colour in a sexually monochromatic cichlid2013

    • Author(s)
      Ota, K., Awata, S., Morita, M., & Kohda, M.
    • Journal Title

      Journal of Zoology

      Volume: (Print ISSN 0952-8369) Issue: 1 Pages: 63-70

    • DOI

      10.1111/jzo.12125

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] 精しょうタンパク質SPP120と生殖行動の関係2013

    • Author(s)
      守田昌哉
    • Organizer
      日本動物学会
    • Place of Presentation
      岡山大学
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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