• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Evolutionary Ecology of Sex

Research Project

Project/Area Number 08304043
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field 生態
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

YAHARA Tetsukazu  Kyushu University, Faculty of Science, Professor, 理学部, 教授 (90158048)

Co-Investigator(Kenkyū-buntansha) KOBAYASHI Ichizo  University of Tokyo, Institute of Medical Science, Associate Professor, 医科学研究所, 助教授 (30126057)
ONOSATO Hiroshi  Shinshu University, Faculty of Science, Professor, 理学部, 教授 (60273067)
TERACHI Toru  Kyoto Sangyo University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (90202192)
SASAKI Akira  Kyushu University, Faculty of Science, Associate Professor, 理学部, 助教授 (90211937)
IWASA Yoh  Kyushu University, Faculty of Science, Professor, 理学部, 教授 (70176535)
嶋田 正和  東京大学, 大学院総合文化研究科, 助教授 (40178950)
牧 雅之  福岡教育大学, 教育学部, 助教授 (60263985)
菊沢 喜八郎  京都大学, 生態学研究センター, 教授 (50271599)
粕谷 英一  九州大学, 理学部, 助教授 (00161050)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥22,200,000 (Direct Cost: ¥22,200,000)
Fiscal Year 1998: ¥6,600,000 (Direct Cost: ¥6,600,000)
Fiscal Year 1997: ¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 1996: ¥7,800,000 (Direct Cost: ¥7,800,000)
KeywordsSexual reproduction / Selfish gene / Recombination / Parasites / Coevolution / Genome conflicts / ゲノムコンフリクト / 資源分野 / トレードオフ / 病原体 / ゲノミックインプリンティング / 性表現 / 資源分配モデル / ウイルス / 挿入変異 / ゲノム間コンフリクト
Research Abstract

Adaptive significance of sexual reproduction remains uncertain. One of the purposes of this project was to unravel this mystery. Pathogen-driven selection has been regarded as a likely factor that can provide a general advantage for sexual reproduction (Red Queen hypothesis). T.Yahara tested this hypothesis using Eupatorium-geminivirus system by comparingsequence divergence of ORF 04, a host-range determinant of geminivirus between viruses infecting sexual and asexual host populations. Frequency of amino acid replacements was significantly higher in sexual host populations, supporting the hypothesis.
A.Sasaki also developed a new model for gene-for-gene interactions between hosts and parasites and showed that antagonistic coevolution between hosts and parasites conserve fitness variation and make sexual reproduction advantageous.
I.Kobayashi demonstrated that restriction-modification systems are parasites of bacterial genome and developed a new hypothesis that homologous recombination evolved as an counter-adaptation against gemomic parasites.
Another target of this project was to describe some genetic systems under genetic conflicts and elucidate dynamics and outcomes of genetic interactions between genetic elements with conflicting interests in their transmission. Under suxual reproduction, Mendelian inheritance is a rule, but this rule is often violated by selfish behaviours of cytoplasmic genetic elements. In Raphanus, for example, male sterility is induced by a mitocondrial gene, but is restored by a nuclear gene. Outcomes of this interaction was examined in the field. Sex ratio distortion system in azuki-bean beetles, that is caused by Infection of microorganisms, was examined and complete nuclear control of sex ratio was confirmed in spite that infection of microorganism was very high.
We also studied various phenomena of genomic imprinting. Y.Iwasa developed several models which can explain some unique properties of genomic inprinting.

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (39 results)

All Other

All Publications (39 results)

  • [Publications] Haraguchi,Y.: "Evolutionary pattern of intra-host pathogen antigenic drift: Effect of cross-reactivity in immune response ." Phil.Trans.Royal Society,London B. 352. 11-20 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yahara,T.: "Molecular evolution of a host-range gene in geminiviruses infecting asexual populations of Eupatorium makinoi." Genes & Genetic Systems. 73. 137-141 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ellner,S: "Speed of invasion in lattice population models:pair-edge approximation." Joumal of Mathematical Biology. 36. 469-484 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Inoue,K.: "Inbreeding depression and outcrossing rate in the endangered autotetraploid plant Aster kantoensis(Asteraceae)" Journal of Heredity. 89. 559-562 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Iwasa,Y.: "The conflict theory of genomic imprinting : How much can be explained?" CURR TOP DEV BIOL. 40. 255-293 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ooi,K.: "Genetic variation of geminiviruses:comparison between sexual and asexual host plant populations." Molecular Ecology. 8・1. 89-97 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 長谷川真理子: "現代によみがえるダーウィン" 文一総合出版, 263 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Haraguchi, Y.: "Evolutionary pattern of intra-host pathogen antigenic drift : Effect of cross-reactivity in immune response. Phil.Trans." Royal Society, London B. 352. 11-20 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yahara, T.: "Molecular evolution of a host-range gene in geminiviruses infecting asexual populations of Eupatorium makinoi." Genes & Genetic Systems. 73. 137-141 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ellner, S.: "Speed of invasion in lattice population models : pair-edge approximation." Journal of Mathematical Biology. 36. 469-484 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Inoue, K.: "Inbreeding depression and outcrossing rate in the endangered autotetraploid plant Aster kantoensis (Asteraceae)" Journal of Heredity. 89. 559-562 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Iwasa Y: "The conflict theory of genomic imprinting : How much can be explained?" CURR TOP DEV BIOL. 40. 255-293 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ooi, K.: "Genetic variation of geminiviruses : comparison between sexual and asexual host plant populations" Molecular Ecology. 8 (1). 89-97 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yahara,T.: "Molecular evolution of a host-range gene in geminiviruses infecting asexual populations of Eupatorium" Genes&Genetic Systems. 73. 137-141 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Ooi,K.: "Genetis variation of geminiviruses:comparison between setween sexual and asexual host plant populations." Molecular Ecology. 8・1. 89-97 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Haraguchi,Y.: "Evolutionary pattern of intra-host pathogen antigenic drift:Effect of cross-reactivity in immune reponse." Phil. Trans.Royal Society,London B. 352. 11-20 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Ellner,S.: "Speed of invasion in lattice population models:pair-edge approximation." Journal of Mathematical Biology. 36. 469-484 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Inoue,K.: "Inbreeding depression and outcroccing rate in the endangered autoteraploid plant Aster kantoensis(Asteraceae)" Journal of Heredity. 89. 559-562 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Iwasa,Y.: "The conflict theory of genomic imprinting:How much can be explained?" CURT TOP DEV BIOL. 40. 255-293 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Funayama,T.: "Effects of virus infection and growth irradiance on fitness components and photosynthetic properties of Eupaorium makinoi(Compositae)." Amer.J.Bot.84. 823-829 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yahara,T.: "Virus infection and the evolution of sex in flowering plants." J.Rep.Dev.43(Suppl.). 90-10 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Konuma,A.: "Temporally changing male reproductive success and resource allocation strategy in protandrous Helacleum lanatum." J.Pl.Res.110. 227-234 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Maki,M.: "Spatial structure of genetic variation in a population of the endangered plant Cerastium fischerianum var.molle." Genes,Genet.Syst.72. 239-242 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Hayashida,T.: "Imprinted genes are up-regulated by growth arrest in embryonic fibroblasts." J.Biochem.122. 901-903 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Moore,T.: "Multiple imprinted sense and antisense transcripts,differential methylation and tandem repeats in a putative imprinting control region upstream of mouse lgf2." Proc.Natl.Acad.Sci.USA. 94. 12509-12514 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Nakamaru,M.: "The evolution of cooperation in a lattice-structured population." J.Theor.Biol.184. 65-81 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Iwasa,Y.: "Optimal size of storage for recovery after unpredictable disturbances." Evol.Ecol.11. 41-65 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Iwasa,Y.: "Evolution of genomic imprinting:Why are so few genes imprinted?" J.Repr.Dev.43 Suppl.15-16 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Harada,Y.: "Probability of clonal identity:inferring the relative success of sexual vs.clonal reproduction from spatial genetic patterns." J.Ecol.85. 591-600 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Iwasa,Y.: "The conflict theory of genomic imprinting:how much can be explained?" Curr.Top.Devel.Biol.40. 257-295 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Fukatsu T.: "Isolation,inoculation to insect host,and molecular phylogeny of an entomogenous fungus Paecilomyces tenuipes." J.Invert.Pathol.70. 203-208 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Ooi,K.: "Molecular phylogeny of geminivirus infecting wild plants in Japan." J.Pl.Res.110. 247-257 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 矢原徹一: "性の進化のパラドックスはどこまで解けたか" 種生物学研究. 20. 67-80 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Funayama,T.et al.: "Effects of virus infection and growth irradiance on fitness components and photosynthetic properties of Eupatorium makinoi(Compositae)." Amer.J.Bot.84(in press.). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Ooi,K.et al.: "Molecular phylgoeny of geminivirus infecting wild plants in Japan." J.PI.Res.110(in press.). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Takahashi,K.: "Genetic recombination through double-strand break repair:Shift from two-progeny mode to one-progeny mode by heterologous inserts." Genetics. 145(in press.). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Nakao,M.: "Genomic imprinting:significance in development and diseases and the molecular mechanisms." J.Biochem.120. 467-473 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Mochizuki,A.: "Evolution of genomic imprinting:why are so few genes imprinted?" Genetics. 144. 1283-1295 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 鷲谷いづみ(共著): "保全生態学入門" 文一総合出版, 270 (1996)

    • Related Report
      1996 Annual Research Report

URL: 

Published: 1996-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi