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Investigation of speciation mechanisms in aphids

Research Project

Project/Area Number 17370028
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Biodiversity/Systematics
Research InstitutionHokkaido University

Principal Investigator

AKIMOTO Shin-ichi  Hokkaido University, Research Faculty of Agriculture, Professor (30175161)

Co-Investigator(Kenkyū-buntansha) AOKI Shigeyuki  Rissho University, Faculty of Econany, Professor (30159280)
KATAGIRI Chihiro  Hokkaido University, Institute of Low Temerature Science, Assistant Professor (90002245)
YAO Izumi  Hokkaido University, Faculty of Science, Research Fellow (70374204)
Project Period (FY) 2005 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥7,990,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2007: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2006: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2005: ¥2,700,000 (Direct Cost: ¥2,700,000)
Keywordsmolecular phylogeny / mitochondria / speciation / geographic variation / host race / gall / parthenogenesis / aphid / 単為生殖 / マイクロサテライト / 遺伝子頻度 / 遺伝子型 / 地理的変動 / 遺伝的分化 / 多様性 / 有性生殖
Research Abstract

The present study attempted to clarify how the peculiar life cycle and reproductive modes of aphids have affected their speciation modes and genetic differentiation, focusing on aphid life cycles characterized by cyclic perthenogenesis. The results of the present study showed that the peculiar life cycles of aphids have led to frequent genetic differentiation and speciation. The scope of the present study was extensive, including the diverse subjects of gall formation and genetic differentiation, rapid speciation accompanied by the association of Aphis species wiith herbaceous plants, genetic differentiation between sexual and permanently asexual populations, speciation accompanied by a rapid change in the life cycle of a host-altemating aphid species, and genetic differentiation through the mutualistic relationships between an aphid species and the attending ants. The present study has clarified the interrelationship among the aphid life cycles, host adaptations, and genetic differentiation, thus having contributed to the understanding of biodiversity in herbivorous insects. For example, it has become clear that there is genetic differentiation among populations on respective host trees in the galling aphid Kaltenbachiella japonica. The present study indicated that the primary cause of the genetic differentiation is due to phenological differences in host individuals. The differences in host phenology prevent gene flow between host-associated populations, leading to genetic differentiation between populations. Another topic in the present study is the finding of polymorphism in mitochondrial haplotypes in the same breeding population of gall-forming aphids. In some species, haplotypes that differ by 3% to 7% in the COI sequence were found to coexist in the same breeding population. Such a large difference among haplotypes has not been reported for any insect or other animal species. Therefore, this issue is a promising subject to be addressed in the future study.

Report

(4 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • Research Products

    (12 results)

All 2008 2007 2006

All Journal Article (9 results) (of which Peer Reviewed: 4 results) Presentation (2 results) Book (1 results)

  • [Journal Article] Toxicity of the aphid Aulacorthum magnoliae to the predator Hannonia axyridis (Coleoptera : Coccinellidae)and genetic variance in the assimilation of the toxic aphids in H. axyridis larvae.2007

    • Author(s)
      Y. Fukunaga, S. Akimoto
    • Journal Title

      Entomological Science 10

      Pages: 45-53

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Toxicity of the aphid Aulacorthum magnoliae to the predator Harmonia axyridis (Coleoptera : Coccinellidae) and genetic variance in the assimilation of the toxic aphids in H. axyridis larvae2007

    • Author(s)
      Y. Fukunaga, S. Akimoto
    • Journal Title

      Entomological Science 10

      Pages: 45-53

    • NAID

      10018912161

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Inbreeding depression, increased phenotypic variance and a trade-off between gonads and appendages in selfed progeny of the aphid Prociphilus oriens.2006

    • Author(s)
      S. Akimoto
    • Journal Title

      Evolution 60

      Pages: 77-86

    • NAID

      120005465484

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Head-plug defence in a gall aphid2006

    • Author(s)
      U. Kurosu, J. Narukawa, S. Buranapanichpan, S. Aoki
    • Journal Title

      Insectes Sociaux 53

      Pages: 86-91

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Inbreeding depression, increased phenotypic variance and a trade-off between gonads and appendages in selfed progeny of the aphid Prociphilus oriens2006

    • Author(s)
      S. Akimoto
    • Journal Title

      Evolution 60

      Pages: 77-86

    • NAID

      120005465484

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Head-plug defence in a gall aphid2006

    • Author(s)
      U. Kurosu, J. Namkawa, S. Buranapanichpan, S. Aoki
    • Journal Title

      Inseotes Sociaux 53

      Pages: 86-91

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Toxicity of the aphid Aulacorthum magnoliae to the predator Harmonia axyridis (Coleoptera: Coccinellidae) and genetic variance in the assimilation of the toxic aphids in H. axyridis larvae.2006

    • Author(s)
      Y. Fukunaga, S. Akimoto
    • Journal Title

      Entomological Science 10

      Pages: 45-53

    • NAID

      10018912161

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Inbreeding depression, increased phenotypic variance and a trade-off between gonads and appendages in selfed progeny of the aphid Prociphilus oriens2006

    • Author(s)
      S.Akimoto
    • Journal Title

      Evolution 60

      Pages: 77-86

    • NAID

      120005465484

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Inbreeding depression, increased phenotypic variance, and a trade-off between gonads and appendages in selfed progeny of the aphid Prociphilus oriens2006

    • Author(s)
      S.Akimoto
    • Journal Title

      Evolution 60(1)

      Pages: 77-86

    • NAID

      120005465484

    • Related Report
      2005 Annual Research Report
  • [Presentation] 日本におけるエンドウヒゲナガアブラムシAcyrthosiphon pisumの無性生殖系統の分布とその系統関係2007

    • Author(s)
      神戸崇, 秋元信一
    • Organizer
      日本昆虫学会
    • Place of Presentation
      神戸大学理学部
    • Year and Date
      2007-09-16
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Distributions of asexual populations and the phylogenetic relationship in the aphid Acvrthosiohon pisum2007

    • Author(s)
      Kate, T., Akimoto, S
    • Organizer
      Annual Meeting of Entomological Society of Japan
    • Place of Presentation
      Kobe Univ.
    • Year and Date
      2007-09-16
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Book] 地球と生命の進化学 : 9章新生代生態系の形成と進化2008

    • Author(s)
      秋元信一
    • Publisher
      北大図書出版会
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary

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Published: 2005-04-01   Modified: 2016-04-21  

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