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  1. No Access

    Article

    Laboratory experiments of Stigmatomyces majewskii (Laboulbeniales: Laboulbeniaceae) infection on Drosophila suzukii (Diptera: Drosophilidae)

    Originally endemic to Asia, Drosophila suzukii (Matsumura, 1931) is a serious agricultural pest that is spreading rapidly throughout the world. To suppress the growing D. suzukii populations, several pest managem...

    Izumi Yamazaki, Moe Onuma, Tomohiko Ri, Izumi Okane… in Applied Entomology and Zoology (2023)

  2. No Access

    Article

    Habitat and seasonal occurrence differ among closely related species of the Drosophila auraria species complex (Diptera: Drosophilidae)

    Closely related species often exhibit similar niches and reproductive interactions. As competition for shared resources, reproductive interference, and hybridization may exclude one or the other species, the c...

    Moe Onuma, Yukie Sato, Kyoichi Sawamura in Applied Entomology and Zoology (2023)

  3. No Access

    Article

    Allelic asymmetry of the Lethal hybrid rescue (Lhr) gene expression in the hybrid between Drosophila melanogaster and D. simulans: confirmation by using genetic variations of D. melanogaster

    In the cross between Drosophila melanogaster females and D. simulans males, hybrid males die at the late larval stage, and the sibling females also die at later stages at high temperatures. Removing the D. simula...

    Mika Shirata, Quenta Araye, Kazunori Maehara, Sora Enya… in Genetica (2014)

  4. No Access

    Article

    Genetic analysis of female mating recognition between Drosophila ananassae and Drosophila pallidosa: application of interspecific mosaic genome lines

    Drosophila ananassae and Drosophila pallidosa are closely related species that can produce viable and fertile hybrids of both sexes, although strong sexual isolation exists between the tw...

    Kyoichi Sawamura, Hua Zhi, Koji Setoguchi, Hirokazu Yamada, Takahiro Miyo… in Genetica (2008)

  5. No Access

    Article

    Genetics of Hybrid Inviability and Sterility in Drosophila: Dissection of Introgression of D. simulans Genes in D. melanogaster Genome

    Interspecific crosses between Drosophila melanogaster and Drosophila simulans usually produce sterile unisexual hybrids. The barrier preventing genetic analysis of hybrid inviability and sterility has been taken ...

    Kyoichi Sawamura, Timothy L. Karr, Masa-Toshi Yamamoto in Genetica (2004)

  6. No Access

    Chapter

    Genetics of hybrid inviability and sterility in Drosophila: dissection of introgression of D. simulans genes in D. melanogaster genome

    Interspecific crosses between Drosophila melanogaster and Drosophila simulans usually produce sterile unisexual hybrids. The barrier preventing genetic analysis of hybrid inviability and sterility has been taken ...

    Kyoichi Sawamura, Timothy L. Karr… in Drosophila melanogaster, Drosophila simula… (2004)

  7. No Access

    Chapter

    The Origin of Reproductive Isolation: Biological Mechanisms of Genetic Incompatibility

    The origin of species has been the mystery of mysteries since Charles Darwin’s era. According to the biological species concept advocated by the founders of the Modern Synthesis, the question ‘how new species ...

    Kyoichi Sawamura in The Biology of Biodiversity (2000)

  8. Article

    Characterization of a reproductive isolation gene, zygotic hybrid rescue, of Drosophila melanogaster by using minichromosomes

    Hybrids carrying the wild type allele of zygotic hybrid rescue (zhr) of Drosophila melanogaster and the maternal cytoplasm of its sibling species (D. simulans, D. mauritiana or D. sechellia) are embryonic lethal,...

    Kyoichi Sawamura, Masa-Tosh Yamamoto in Heredity (1997)

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  9. No Access

    Article

    Rescue of hybrid sterility in crosses between D. melanogaster and D. simulans

    THE genetic analysis of reproductive isolation between species of Drosophila has now reached the resolution necessary1,2 to start answering one of the fundamental questions of evolution: what is the genetic basis...

    Andrew W. Davis, John Roote, Teresa Morley, Kyoichi Sawamura, Siegrun Herrmann… in Nature (1996)

  10. No Access

    Article

    Cytogenetical localization of Zygotic hybrid rescue (Zhr), a Drosophila melanogaster gene that rescues interspecific hybrids from embryonic lethality

    Hybrid females from crosses between Drsophila melanogaster males and females of its sibling species, D. simulans, D. mauritiana, or D. sechellia die as embryos. This lethality is believed to be caused by incompat...

    Kyoichi Sawamura, Masa-Toshi Yamamoto in Molecular and General Genetics MGG (1993)

  11. No Access

    Article

    Hybrid lethal systems in theDrosophila melanogaster species complex

    Lethal phases of the hybrids betweenDrosophila melanogaster and its sibling species,D. simulans are classified into three types: (1) embryonic lethality in hybrids carryingD. simulans cytoplasm andD. melanogaster

    Kyoichi Sawamura, Takao K. Watanabe, Masa-Toshi Yamamoto in Genetica (1993)