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Evolution of the morphological structure of mammalian molars: with reference to the historical theories.

Research Project

Project/Area Number 16K18601
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Biodiversity/Systematics
Research InstitutionAichi Gakuin University (2017-2019)
Mie University (2016)

Principal Investigator

Asahara Masakazu  愛知学院大学, 教養部, 講師 (20709399)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Discontinued (Fiscal Year 2019)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords歯の形態進化 / 臼歯形態 / 食性適応 / Inhibitory cascade model / Inhibitory cascade / 形態進化 / 食性推定 / 臼歯 / Inhibitory cascade model / 食肉目 / クマ科 / 単孔類 / オブドゥロドン / カモノハシ / 三叉神経 / 系統進化 / 解剖学 / 形態 / 哺乳類 / 歯
Outline of Final Research Achievements

This project aims to elucidate the adaptive and developmental aspects of the evolution of molar morphology in mammals using the combination of three methods: comparative morphology using museum specimens, morphological analysis of genetically modified mice, and analysis of molecular evolution. It is an important question in evolutionary biology why one taxon has been able to overwhelm other taxa during the evolution. The present study clarified that the Carnivora has an advantage to its competitors in terms of the developmental mechanism and functional morphology of the molar. The present study has successfully pioneered the research method using museum specimens and genome data, which is the “biodiversity-derived dataset”.

Academic Significance and Societal Importance of the Research Achievements

なぜある分類群が他の分類群を長期的に凌駕して繁栄することができたのか、という問いは進化生物学上の重要な命題である。本研究は食肉目とその競合群を事例として、歯の発生学的要因と機能形態学的特徴という観点からその一因を明らかにした。その過程で得られた知見の一部は化石哺乳類の食性推定にも応用され、その手法を利用した論文が他の研究者からも出ている。手法面においても、博物館標本やゲノムデータは現在蓄積されつつある「生物多様性から得られたデータセット」ともいえるものであるが、それを複合的に利用した本研究計画の成功は新たな生物学の研究手法を開拓したといえる。

Report

(4 results)
  • 2019 Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (23 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (3 results) Journal Article (11 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 9 results,  Open Access: 7 results,  Acknowledgement Compliant: 4 results) Presentation (9 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results)

  • [Int'l Joint Research] ニュー・サウス・ウェールズ大学(オーストラリア)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] セントメアリー大学(米国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] ソウル大学(韓国)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Dietary transition in the Nyctereutes sinensis and Nyctereutes procyonoides lineage during the Pleistocene2019

    • Author(s)
      Asahara Masakazu、Takai Masanaru
    • Journal Title

      Acta Zoologica

      Volume: 100 Issue: 2 Pages: 216-217

    • DOI

      10.1111/azo.12233

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Estimation of diet in extinct raccoon dog species by a new method using lower molar ratios2017

    • Author(s)
      Asahara M, Takai M
    • Journal Title

      Acta Zoologica

      Volume: 印刷中 Issue: 3 Pages: 292-299

    • DOI

      10.1111/azo.12179

    • Related Report
      2017 Research-status Report 2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Geographic variation of craniodental morphology of the Eurasian otter (<i>Lutra lutra</i>) in East Asia2017

    • Author(s)
      Lau ACC., Asahara M., Han SY., Kimura J
    • Journal Title

      Journal of Veterinary Medical Science

      Volume: 79 Issue: 1 Pages: 144-152

    • DOI

      10.1292/jvms.16-0250

    • NAID

      130005289723

    • ISSN
      0916-7250, 1347-7439
    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Geographic variation of absolute and relative lower molar sizes in two closely related species of Japanese field mice (Apodemus speciosus and Apodemus argenteus: Muridae, Rodentia).2017

    • Author(s)
      Asahara M
    • Journal Title

      Zoological Science

      Volume: 34 Issue: 1 Pages: 26-34

    • DOI

      10.2108/zs160103

    • NAID

      40021108457

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Geographic variation of absolute and relative lower molar sizes in the Japanese macaque (Macaca fuscata: Primates, Mammalia)2017

    • Author(s)
      Asahara M, Nishioka Y
    • Journal Title

      Zoological Science

      Volume: 34 Issue: 1 Pages: 35-41

    • DOI

      10.2108/zs160104

    • NAID

      40021108464

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] オーストラリアの”カモノハシ外交”を概観する:第二次世界大戦から現在まで2017

    • Author(s)
      浅原正和
    • Journal Title

      三重大学教養教育機構研究紀要

      Volume: 2 Pages: 1-17

    • Related Report
      2016 Research-status Report
    • Open Access
  • [Journal Article] Effects of Usag-1 and Bmp7 deficiencies on murine tooth morphogenesis.2016

    • Author(s)
      Saito K., Takahashi K., Asahara M., Kiso H., Togo Y., Tsukamoto H., Huang B., Sugai M., Shimizu A., Motokawa M., Slavkin HC., Bessho K.
    • Journal Title

      BMC Dev Biol.

      Volume: 16 Issue: 1 Pages: 14-23

    • DOI

      10.1186/s12861-016-0117-x

    • NAID

      120005819500

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Unique pattern of dietary adaptation in the dentition of Carnivora: its advantage and developmental origin.2016

    • Author(s)
      Asahara M ., Saito K., Kishida T., Takahashi K., Bessho K.
    • Journal Title

      Proceedings of the Royal Society B

      Volume: 283 Issue: 1832 Pages: 20160375-20160375

    • DOI

      10.1098/rspb.2016.0375

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Sexual dimorphism of the Eurasian otter (<i>Lutra lutra</i>) in South Korea: Craniodental geometric morphometry2016

    • Author(s)
      Lau ACC., Asahara M ., Han SY., Kimura J
    • Journal Title

      Journal of Veterinary Medical Science

      Volume: 78 Issue: 6 Pages: 1007-1011

    • DOI

      10.1292/jvms.16-0018

    • NAID

      130005159667

    • ISSN
      0916-7250, 1347-7439
    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Comparative cranial morphology in living and extinct platypuses: Feeding behaviour, electroreception and loss of teeth.2016

    • Author(s)
      Asahara M ., Koizumi M., Macrini T.E., Hand S.J., Archer M.
    • Journal Title

      Science Advances

      Volume: 2 Issue: 10

    • DOI

      10.1126/sciadv.1601329

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] The origin of the lower fourth molar in canids, inferred by individual variation.2016

    • Author(s)
      Asahara M
    • Journal Title

      PeerJ

      Volume: 4 Pages: e2689-e2689

    • DOI

      10.7717/peerj.2689

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] 比較形態学を基軸に遺伝子改変マウスと分子進化の解析を用いた変異性と進化傾向の研究2018

    • Author(s)
      浅原正和
    • Organizer
      日本進化学会第20回大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] カモノハシはなぜ歯を失った?くちばしの感覚と歯のトレードオフ!?2018

    • Author(s)
      浅原正和
    • Organizer
      いきもにあ2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] カモノハシはなぜ歯を失った? 化石から推測される三叉神経の発達と行動の進化2018

    • Author(s)
      浅原正和
    • Organizer
      第9回 有明臨床解剖学シンポジウム
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Evolution and development of functional change, increase, decrease, and loss of teeth in mammals: examples of Carnivora and platypus.2017

    • Author(s)
      Asahara M
    • Organizer
      12th International Mammalogical Congress
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] クマ科の臼歯形態とBMP7遺伝子の進化:化石・遺伝子改変マウス・分子進化の解析から2017

    • Author(s)
      浅原正和
    • Organizer
      日本哺乳類学会2017年度大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 骨形態からみた現生・化石カモノハシの行動、感覚能力の違い ―カモノハシが歯を失った原因とは―2017

    • Author(s)
      浅原正和
    • Organizer
      名古屋哺乳類研究会・豊田哺乳類研究会 2017年度例会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 変異性に着目した哺乳類の歯と頭骨の形態進化に関する研究2016

    • Author(s)
      浅原正和
    • Organizer
      日本哺乳類学会2016年度大会
    • Place of Presentation
      筑波大学 つくば市
    • Year and Date
      2016-09-23
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] 哺乳類における歯の増加、減少、そして消失に関わる要因:食肉目とカモノハシを事例に2016

    • Author(s)
      浅原正和
    • Organizer
      日本進化学会第18回大会
    • Place of Presentation
      東京工業大学大岡山キャンパス 東京都
    • Year and Date
      2016-08-25
    • Related Report
      2016 Research-status Report
  • [Presentation] Developmental mechanism and genetic basis of the unique morphological characters of non-model organisms: investigation in bear molars as an example.2016

    • Author(s)
      Asahara M., Kishida T.
    • Organizer
      11th International Congress of Vertebrate Morphology (ICVM-2016).
    • Place of Presentation
      Bethesda North Marriott Hotel & Conference Center, Washington DC, USA
    • Year and Date
      2016-06-28
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2022-02-22  

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