写真a

GOTOH Ayako

Position

Associate Professor

Graduating School 【 display / non-display

  • 1998.04
    -
    2002.03

    Tokyo Metropolitan University   Faculty of Science   Graduated

Graduate School 【 display / non-display

  • 2004.04
    -
    2008.02

    Ehime University  Graduate School, Division of Agricltural Sciences  Doctor's Course  Completed

  • 2002.04
    -
    2004.03

    The University of Tokyo  Graduate School, Division of Science  Master's Course  Completed

 

Published Papers 【 display / non-display

  • Transcriptome characterization of male accessory glands in ants to identify molecules involved in their reproductive success

    A. Gotoh, S. Shigenobu, S. Shigenobu, K. Yamaguchi, S. Kobayashi, F. Ito, K. Tsuji

    Insect Molecular Biology   27   212 - 220   2018.04

    Joint Work

    © 2017 The Royal Entomological Society In insects, seminal fluid proteins that are produced by male accessory glands and transferred to females during mating have key functions in sperm competition and sperm physiology that lead to male reproductive success. In ants, male reproductive success also depends on the longevity of sperm stored in the queen's spermatheca because their sexual offspring are usually produced only after a prolonged storage period. We identified genes that were up-regulated in the male accessory glands relative to the bodies of Crematogaster osakensis to characterize the reproductive molecules associated with male reproductive success in ants. We found novel genes that had no hits in a homology search and that were predominantly expressed in the accessory glands. These reproductive proteins may have evolved under rapid positive selection for reproductive success in the species. Furthermore, we discovered that three spermatheca-specific genes of C. osakensis queens were also enriched in the accessory glands relative to the bodies of males. These genes may be important for maintaining the sperm quality continuously from ejaculation by males to prolonged storage by queens. This research provides crucial information about the molecular mechanisms of sperm maintenance and sexual selection in ants, and also insight into the evolution of reproductive strategies in insects.

    DOI PubMed

  • Journey of sperms from production by males to storage by queens in Crematogaster osakensis (Hymenoptera: Formicidae).

    Gotoh A, Furukawa K

    Journal of insect physiology   105   95 - 101   2018.02

    Joint Work

    DOI PubMed

  • Transcriptome profiling of the spermatheca identifies genes potentially involved in the long-term sperm storage of ant queens.

    Gotoh A, Shigenobu S, Yamaguchi K, Kobayashi S, Ito F, Tsuji K

    Scientific reports   7 ( 1 ) 5972   2017.07

    Joint Work

    DOI PubMed

  • Social structure of the polygynous ant, Crematogaster osakensis

    A. Gotoh, M. Dansho, S. Dobata, Y. Ikeshita, F. Ito

    Insectes Sociaux   64   123 - 131   2017.02

    Joint Work

    © 2016, International Union for the Study of Social Insects (IUSSI). The colony structures of social insects vary greatly among species. In ant societies, the number of queens within a colony is variable during colony maturation. We investigated the social structure of a polygynous ant Crematogaster osakensis in a series of field and laboratory experiments. First, the initial colonies headed by multiple queens were found in the field. In laboratory experiments, queens that were artificially cohabited after their nuptial flight harmoniously co-existed even in the presence of newly emerged workers, suggesting that mated queens of this species can establish their colony cooperatively as primary polygynous colonies. In addition, the mating frequency of a queen was typically more than one, estimated from the sperm number stored in field-collected males and queens, and from genetic relatedness among daughters of lab-reared monogynous colonies. Second, our assessment of genetic relatedness in a mature field colony of this species revealed that dealated queens, as well as workers and alates, were relatives. The number of developed oocytes identified reproductive skew in two of five field-collected nests. Moreover, under laboratory conditions, the most fertile egg layer altered over 3 months of observation. Based on these lines of evidence, we propose that in C. osakensis, polygynous foundresses might either be unrelated and subsequently be replaced by daughter queens of particular foundresses, or be related in the first place.

    DOI

  • Degeneration patterns of the worker spermatheca during morphogenesis in ants (Hymenoptera: Formicidae).

    Gotoh A, Billen J, Hashim R, Ito F

    Evolution & development   18 ( 2 ) 96 - 104   2016.03

    Joint Work

    DOI PubMed

display all >>