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Katoh Toru
| Faculty of Science Biological Sciences Biodiversity | Associate Professor |
| Genome Dynamics Research Center | Associate Professor |
| Institute for Academic Innovation | Associate Professor |
Researcher basic information
■ Degree■ URL
researchmap URLホームページURL■ Various IDs
J-Global ID■ Research Keywords and Fields
Research KeywordResearch Field■ Educational Organization
- Bachelor's degree program, School of Science
- Master's degree program, Graduate School of Science
- Doctoral (PhD) degree program, Graduate School of Science
Research activity information
■ Awards- Sep. 2023, The Entomological Society of Japan, Entomological Science Award 2023
Coexistence mechanisms of Colocasiomyia species (Diptera: Drosophilidae) sharing inflorescences of Alocasia odora (Araceae) as a host plant: Comparison between two- and three-species systems.
Masanori J. Toda;Kohei Takenaka Takano;Toru Katoh;Ling Xiao;Jian-Jun Gao;Masako Yafuso - Sep. 2018, The Entomological Society of Japan, Entomological Science Award 2018
Multiple origins of Hawaiian drosophilids: Phylogeography of Scaptomyza Hardy (Diptera: Drosophilidae).
Toru Katoh;Hiroyuki Izumitani;Shinji Yamasita;Masayoshi Watada, Official journal
- Recent speciation with host change in the genus Lordiphosa Basden (Diptera: Drosophilidae) breeding on decayed herbaceous plants, with description of a new species based on integrative taxonomy
Kei Mitsuhashi; Hiroyuki F. Izumitani; Masanori J. Toda; Hide‐aki Watabe; Yoshitaka Kamimura; Aya Takahashi; Jian‐Jun Gao; Toru Katoh
Entomological Science, 29, 1, Wiley, 27 Feb. 2026, [Peer-reviewed], [Corresponding author]
English, Scientific journal, Abstract
We found a presumably new species that is closely related to Lordiphosa collinella but different from it in the range of host plants. Lordiphosa collinella is a generalist breeding on a wide variety of decayed herbaceous plants. In contrast, the new form almost specializes in breeding on Pachysandra terminalis . First, we delineate the latter specialist as a new species, Lordiphosa yuktopakina sp. nov. The hypothesis that they are sibling but distinct species is highly supported by studies of breeding ecology, morphology, genetic differentiation and reproductive isolation. Lordiphosa yuktopakina is estimated to have differentiated from L . collinella approximately 0.121 million years ago. For the ancestor of L . yuktopakina to use P. terminalis as an alternative host plant, the fly should have surmounted the hard texture of the host plant tissue. Lordiphosa yuktopakina has achieved this by making the ovipositor more robust and increasing the size of the cephalopharyngeal skeleton and the allometry of the mouth hook with larger teeth especially in the 1st instar larva. These adaptations to the newly acquired host plant should be reflected in the female reproductive traits. Thus, the two Lordiphosa species studied here provide a new instance of recent speciation with change and specialization to a particular host plant., 11402226 - Alpha‐amanitin tolerance of adult flies of mycophagous and nonmycophagous species in Drosophilidae
Yang Zhang; Masanori J. Toda; Hide‐aki Watabe; Toru Katoh
Entomological Science, 27, 3, e12577, e12577, Wiley, 08 Aug. 2024, [Peer-reviewed], [Corresponding author]
English, Scientific journal, Abstract
Mushrooms produce a great variety of defense chemical compounds to protect themselves from fungivores. Alpha‐amanitin is one of such compounds found in some Amanita mushrooms. The present study focuses on the effect of α‐amanitin on adult survival in 17 drosophilid species including mycophagous ones from the subgenus Drosophila and the genus Hirtodrosophila and nonmycophagous ones of the subgenera Drosophila, Siphlodora and Sophophora. The results showed that all the essential fungivores and some partially mycophagous species from different lineages are tolerant to this lethal toxin at a concentration of 50 μg/mL, suggesting that the α‐amanitin tolerance may have been acquired more or less independently of the evolution of mycophagy in the family Drosophilidae. - Single-fly genome assemblies fill major phylogenomic gaps across the Drosophilidae Tree of Life
Bernard Y. Kim; Hannah R. Gellert; Samuel H. Church; Anton Suvorov; Sean S. Anderson; Olga Barmina; Sofia G. Beskid; Aaron A. Comeault; K. Nicole Crown; Sarah E. Diamond; Steve Dorus; Takako Fujichika; James A. Hemker; Jan Hrcek; Maaria Kankare; Toru Katoh; Karl N. Magnacca; Ryan A. Martin; Teruyuki Matsunaga; Matthew J. Medeiros; Danny E. Miller; Scott Pitnick; Michele Schiffer; Sara Simoni; Tessa E. Steenwinkel; Zeeshan A. Syed; Aya Takahashi; Kevin H-C. Wei; Tsuya Yokoyama; Michael B. Eisen; Artyom Kopp; Daniel Matute; Darren J. Obbard; Patrick M. O’Grady; Donald K. Price; Masanori J. Toda; Thomas Werner; Dmitri A. Petrov
PLOS Biology, 22, 7, e3002697, e3002697, Public Library of Science (PLoS), 18 Jul. 2024, [Peer-reviewed]
English, Scientific journal, Long-read sequencing is driving rapid progress in genome assembly across all major groups of life, including species of the family Drosophilidae, a longtime model system for genetics, genomics, and evolution. We previously developed a cost-effective hybrid Oxford Nanopore (ONT) long-read and Illumina short-read sequencing approach and used it to assemble 101 drosophilid genomes from laboratory cultures, greatly increasing the number of genome assemblies for this taxonomic group. The next major challenge is to address the laboratory culture bias in taxon sampling by sequencing genomes of species that cannot easily be reared in the lab. Here, we build upon our previous methods to perform amplification-free ONT sequencing of single wild flies obtained either directly from the field or from ethanol-preserved specimens in museum collections, greatly improving the representation of lesser studied drosophilid taxa in whole-genome data. Using Illumina Novaseq X Plus and ONT P2 sequencers with R10.4.1 chemistry, we set a new benchmark for inexpensive hybrid genome assembly at US $150 per genome while assembling genomes from as little as 35 ng of genomic DNA from a single fly. We present 183 new genome assemblies for 179 species as a resource for drosophilid systematics, phylogenetics, and comparative genomics. Of these genomes, 62 are from pooled lab strains and 121 from single adult flies. Despite the sample limitations of working with small insects, most single-fly diploid assemblies are comparable in contiguity (>1 Mb contig N50), completeness (>98% complete dipteran BUSCOs), and accuracy (>QV40 genome-wide with ONT R10.4.1) to assemblies from inbred lines. We present a well-resolved multi-locus phylogeny for 360 drosophilid and 4 outgroup species encompassing all publicly available (as of August 2023) genomes for this group. Finally, we present a Progressive Cactus whole-genome, reference-free alignment built from a subset of 298 suitably high-quality drosophilid genomes. The new assemblies and alignment, along with updated laboratory protocols and computational pipelines, are released as an open resource and as a tool for studying evolution at the scale of an entire insect family. - Coexistence mechanisms of Colocasiomyia species (Diptera: Drosophilidae) sharing inflorescences of Alocasia odora (Araceae) as a host plant: Comparison between two‐ and three‐species systems
Masanori J. Toda; Kohei Takenaka Takano; Toru Katoh; Ling Xiao; Jian‐Jun Gao; Masako Yafuso
Entomological Science, 25, 2, Wiley, Jun. 2022, [Peer-reviewed]
English, Scientific journal - Evolution of a neuromuscular sexual dimorphism in the Drosophila montium species group
Han-qing Liang; Toru Katoh; Kosei Sato; Daisuke Yamamoto; Shuo-yang Wen
Scientific Reports, 11, 1, 15272, Springer Science and Business Media LLC, Dec. 2021, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal,Abstract While epigamic traits likely evolve via sexual selection, the mechanism whereby internal sexual dimorphism arises remains less well understood. Seeking clues as to how the internal sexual dimorphism evolved, we compared the abdominal musculature of 41Drosophila montium group species, to determine whether any of these species carry a male-specific muscle of Lawrence (MOL). Our quantitative analysis revealed that the size of a sexually dimorphic MOL analog found in 19montium group species varied widely from species to species, suggesting the gradual evolution of this sexually dimorphic neuromuscular trait. We attempted the ancestral state reconstitution for the presence or absence of the neuromuscular sexual dimorphism in the A5 segment; the neuromuscular sexual dimorphism existed in an old ancestor of themontium group, which was lost in some of the most recent common ancestors of derived lineages, and subsequently some species regained it. This loss-and-gain history was not shared by evolutionary changes in the courtship song pattern, even though both traits were commonly regulated by the master regulator male-determinant protein FruM. It is envisaged that different sets of FruM target genes may serve for shaping the song and MOL characteristics, respectively, and, as a consequence, each phenotypic trait underwent a distinct evolutionary path. - Phylogeny and evolution of mycophagy in the Zygothrica genus group (Diptera: Drosophilidae)
Yang Zhang; Takehiro K. Katoh; Cédric Finet; Hiroyuki F. Izumitani; Masanori J. Toda; Hide-aki Watabe; Toru Katoh
Molecular Phylogenetics and Evolution, 163, 107257, 107257, Elsevier BV, Oct. 2021, [Peer-reviewed], [Corresponding author], ［Internationally co-authored］, [International Magazine]
English, Scientific journal, 10305224;10305203 - DrosoPhyla: resources for Drosophilid Phylogeny and Systematics
Cédric Finet; Victoria A Kassner; Antonio B Carvalho; Henry Chung; Jonathan P Day; Stephanie Day; Emily K Delaney; Francine C De Ré; Héloïse D Dufour; Eduardo Dupim; Hiroyuki F Izumitani; Thaísa B Gautério; Jessa Justen; Toru Katoh; Artyom Kopp; Shigeyuki Koshikawa; Ben Longdon; Elgion L Loreto; Maria D S Nunes; Komal K B Raja; Mark Rebeiz; Michael G Ritchie; Gayane Saakyan; Tanya Sneddon; Machiko Teramoto; Venera Tyukmaeva; Thyago Vanderlinde; Emily E Wey; Thomas Werner; Thomas M Williams; Lizandra J Robe; Masanori J Toda; Ferdinand Marlétaz
Genome Biology and Evolution, 13, 8, evab179, Oxford University Press (OUP), 03 Aug. 2021, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal,Abstract
The vinegar fly Drosophila melanogaster is a pivotal model for invertebrate development, genetics, physiology, neuroscience, and disease. The whole family Drosophilidae, which contains over 4,400 species, offers a plethora of cases for comparative and evolutionary studies. Despite a long history of phylogenetic inference, many relationships remain unresolved among the genera, subgenera and species groups in the Drosophilidae. To clarify these relationships, we first developed a set of new genomic markers and assembled a multilocus dataset of 17 genes from 704 species of Drosophilidae. We then inferred a species tree with highly supported groups for this family. Additionally, we were able to determine the phylogenetic position of some previously unplaced species. These results establish a new framework for investigating the evolution of traits in fruit flies, as well as valuable resources for systematics. - Taxonomy and evolution of asymmetric male genitalia in the subgenus Ashima Chen (Diptera: Drosophilidae: Phortica Schiner), with descriptions of seven new species
MASANORI J. TODA; HANS BÄNZIGER; PRADEEP C. SATI; RAJENDRA S. FARTYAL; AWIT SUWITO; TORU KATOH
Zootaxa, 4789, 1, 1, 54, Magnolia Press, 08 Jun. 2020, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
Scientific journal, The taxonomy of the subgenus Ashima of the genus Phortica is revised. A cladistic analysis of 66 morphological characters is conducted, covering 35 species (28 known and 7 new species: Phortica efragmentata sp. nov., P. andreagigoni sp. nov., P. watabei sp. nov., P. halimunensis sp. nov., P. akutsui sp. nov., P. kerinciensis sp. nov., and P. takehiroi sp. nov.) which correspond to 71.4% of 49 total spp. of Ashima. The resulting cladogram shows that the studied species are separated into several clades/subclades/cluster each highly supported with specific synapomorphies. Those clades/subclades/cluster are newly defined as the following species groups, subgroups or complex: the afoliolata, foliiseta, nigrifoliiseta and angulata species groups; the foliiseta, tanabei, nigrifoliiseta and glabra species subgroups; and the foliiseta species complex. The subgenus Ashima is peculiar in having the asymmetric male genitalia as the ground plan and showing the antisymmetry (i.e. intraspecific mirror-image variation) in some species but the directional asymmetry (i.e. side-fixed asymmetry) in others. The evolution of genital asymmetry in this subgenus is estimated by mapping the states (symmetry, directional asymmetry and antisymmetry) of bilateral structures of male genitalia on the cladogram. This ancestral state reconstruction estimates that the directional asymmetry of male genitalia has evolved at the ancestor of this subgenus and then changed to the antisymmetric state independently in two lineages, the angulata + nigrifoliiseta species groups and the foliiseta species complex. In this study, a standardized terminology recently proposed for the male terminalia of Drosophila melanogaster is extendedly adopted to describe the morphology of male terminalia in the subgenus Ashima, one group of the subfamily Steganinae. - Evolution and diversity of the courtship repertoire in the Drosophila montium species group (Diptera: Drosophilidae)
Toru Katoh
Journal of Evolutionary Biology, 32, 10, 1124, 1140, Oct. 2019, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - Phylogeny of the genus Scaptomyza Hardy (Diptera: Drosophilidae)
Toru Katoh
Japanese Journal of Entomology (New Series), 22, 2, 56, 65, Jun. 2019, [Peer-reviewed], [Invited], [Lead author, Corresponding author], [Domestic magazines]
Japanese, Scientific journal, 10305202 - A matter of persistence: differential Late Pleistocene survival of two rocky-shore idoteid isopod species in northern Japan
Shimpei F. Hiruta; Maho Ikoma; Toru Katoh; Hiroshi Kajihara; Matthew H. Dick
HYDROBIOLOGIA, 799, 1, 151, 179, Sep. 2017, [Peer-reviewed], [International Magazine]
English, Scientific journal, 11402224 - Drosophilid fauna of “Keiteki-no-mori”, within the campus of Hokkaido University, Sapporo, Japan
Izumitani HF; Mitsuhashi K; Terada T; Katoh T
Japanese Journal of Entomology (New Series), 20, 3, 109, 119, 日本昆虫学会, Jul. 2017, [Peer-reviewed], [Corresponding author], [Domestic magazines]
Japanese, Scientific journal - Multiple origins of Hawaiian drosophilids: Phylogeography of Scaptomyza Hardy (Diptera: Drosophilidae)
Toru Katoh; Hiroyuki F. Izumitani; Shinji Yamashita; Masayoshi Watada
ENTOMOLOGICAL SCIENCE, 20, 1, 33, 44, Jan. 2017, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, Scientific journal, 10305202;10305224 - Phylogeography of the Subgenus Drosophila (Diptera: Drosophilidae): Evolutionary History of Faunal Divergence between the Old and the New Worlds
Hiroyuki F. Izumitani; Yohei Kusaka; Shigeyuki Koshikawa; Masanori J. Toda; Toru Katoh
PLOS ONE, 11, 7, e0160051, Jul. 2016, [Peer-reviewed], [Corresponding author], [International Magazine]
English, Scientific journal, 10305224 - Molecular Phylogeny of Cypridoid Freshwater Ostracods (Crustacea: Ostracoda), Inferred from 18S and28S rDNA Sequences
Shimpei F. Hiruta; Norio Kobayashi; Toru Katoh; Hiroshi Kajihara
ZOOLOGICAL SCIENCE, 33, 2, 179, 185, Apr. 2016, [Peer-reviewed], [International Magazine]
English, Scientific journal - Introgression and Habitat Segregation in a Pair of Ladybird Beetle Species in the Genus Propylea (Coccinellidae, Coccinellinae) in Northern Japan
Hiromu Suga; Wataru Hirano; Toru Katoh; Kei W. Matsubayashi; Haruo Katakura
ZOOLOGICAL SCIENCE, 33, 6, 603, 610, 2016, [Peer-reviewed], [International Magazine]
English, Scientific journal - Phylogeny of Epilachna, Henosepilachna, and Some Minor Genera of Phytophagous Ladybird Beetles (Coleoptera: Coccinellidae: Coccinellinae: Epilachnini), with an Analysis of Ancestral Biogeography and Host-Plant Utilization
Toru Katoh; Shinsaku Koji; Takahide A. Ishida; Kei W. Matsubayashi; Sih Kahono; Norio Kobayashi; Kota Furukawa; Bui Tuan Viet; Joao Vasconcellos-Neto; Charles N. Lange; Georg Goergen; Susumu Nakano; Nan-Nan Li; Guo-Yue Yu; Haruo Katakura
ZOOLOGICAL SCIENCE, 31, 12, 820, 830, Dec. 2014, [Peer-reviewed], [Lead author], ［Internationally co-authored］, [International Magazine]
English, Scientific journal, 10305201 - Divergence of East Asians and Europeans Estimated Using Male- and Female-Specific Genetic Markers
Yoshio Tateno; Tomoyoshi Komiyama; Toru Katoh; Batmunkh Munkhbat; Akira Oka; Yuko Haida; Hiroyuki Kobayashi; Gen Tamiya; Hidetoshi Inoko
GENOME BIOLOGY AND EVOLUTION, 6, 3, 466, 473, 2014, [Peer-reviewed], [International Magazine]
English, Scientific journal - Description and molecular phylogeny of a new species of Phoronis (Phoronida) from Japan, with a redescription of topotypes of P. ijimai Oka, 1897
Masato Hirose; Ryuma Fukiage; Toru Katoh; Hiroshi Kajihara
ZOOKEYS, 398, 398, 1, 31, 2014, [Peer-reviewed], [International Magazine]
English, Scientific journal - Colocasiomyia (Diptera: Drosophilidae) revised phylogenetically, with a new species group having peculiar lifecycles on monsteroid (Araceae) host plants
Rajendra S. Fartyal; Jian-Jun Gao; Masanori J. Toda; Yao-Guang Hu; Kohei Takenaka Takano; Awit Suwito; Toru Katoh; Tomohiro Takigahira; Jian-Tao Yin
SYSTEMATIC ENTOMOLOGY, 38, 4, 763, 782, Oct. 2013, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - Three species of Amphicorina (Annelida, Sabellida, Sabellidae) from Japan, with descriptions of two new species
Taiki Yoshihara; Shimpei F. Hiruta; Toru Katoh; Hiroshi Kajihara
ZOOKEYS, 187, 187, 45, 62, 2012, [Peer-reviewed], [International Magazine]
English, Scientific journal - Molecular Systematics of Tanaidacea (Crustacea: Peracarida) Based on 18S Sequence Data, with an Amendment of Suborder/Superfamily-level Classification
Keiichi Kakui; Toru Katoh; Shimpei F. Hiruta; Norio Kobayashi; Hiroshi Kajihara
ZOOLOGICAL SCIENCE, 28, 10, 749, 757, Oct. 2011, [Peer-reviewed], [International Magazine]
English, Scientific journal - Phylogenetic relationships between Sophophora and Lordiphosa, with proposition of a hypothesis on the vicariant divergences of tropical lineages between the Old and New Worlds in the family Drosophilidae
Jian-jun Gao; Yao-guang Hu; Masanori J. Toda; Toru Katoh; Koichiro Tamura
MOLECULAR PHYLOGENETICS AND EVOLUTION, 60, 1, 98, 107, Jul. 2011, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal, 11402225 - Systematics and phylogeny of the hoplonemertean genus Diplomma (Nemertea) based on molecular and morphological evidence
Hiroshi Kajihara; Minerva Olympia; Norio Kobayashi; Toru Katoh; Hai-Xia Chen; Malin Strand; Per Sundberg
ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, 161, 4, 695, 722, Apr. 2011, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - First record of the poorly known pelagic nemertean Protopelagonemertes beebei (Nemertea: Hoplonemertea: Polystilifera: Pelagica) from Japanese waters, with discussion of the species identity
Hiroshi Kajihara; Toru Katoh; Dhugal J. Lindsay
Marine Biodiversity Records, 4, e13, 1, 8, Apr. 2011, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - Progress and prospects of the molecular phylogenetic studies of Drosophilidae
加藤 徹
Low temperature science, 69, 0, 1, 9, 北海道大学低温科学研究所 = Institute of Low Temperature Science, Hokkaido University, 2011, [Peer-reviewed], [Lead author, Corresponding author], [Domestic magazines]
Japanese, ショウジョウバエ科の系統関係については古くから注目され, これまでにいくつかの古典的な研究が知られている. 中でも, Throckmortonは1975年に内部形態や地理的分布などに基づいたショウジョウバエ科の系統に関する仮説を提唱し, 多くの研究者に広く受け入れられてきた. しかし, その後, Grimaldi（1990）は数多くの外部形態を用いて分岐学的解析を行い, Throckmortonの説と大きく異なる仮説を提唱した. それ以来, ショウジョウバエ科の系統関係を分子系統学的見地から再検討しようとする試みが, これまで数多くなされている. 興味深いことに, 分子系統解析に基づく最近の研究結果は, 後から提唱されたGrimaldiの仮説よりも, むしろ古典的なThrockmortonの仮説に近い傾向にある. しかしながら, ハワイ産ショウジョウバエを含むいくつかの重要な分類群の系統関係については, 分子系統解析から, 両者何れの仮説とも異なる独自の見解が新たに得られている. 本稿では, ショウジョウバエにおける最近の分子系統学研究の結果を概説するとともに, ショウジョウバエ系統学の今後の展望について議論する.The phylogeny of Drosophilidae has been of great interest, and several classical studies have been made. Among them, one of the most famous studies was Throckmorton (1975), in which he proposed a phylogenetic framework for Drosophilidae based on the comparisons of internal morphology and biogeography. On the other hand, based on a cladistic analysis of external morphology, Grimaldi (1990) put forward another hypothesis that was substantially different from that of Throckmorton (1975). Since then, many molecular approaches have been undertaken in order to solve this problem. It is noteworthy that many phylogenetic studies using molecular data on the whole are in agreement with Throckmorton's classical hypothesis rather than Grimaldi's. Furthermore, these studies also give some additional findings that are different from either Throckmorton's or Grimaldi's. I review these results and then discus prospects of phylogenetic studies on Drosophilidae.生物進化研究のモデル生物群としてのショウジョウバエ. 北海道大学低温科学研究所編 - Effects of Straits as Dispersal Barriers for the Flightless Roving Carrion Beetle, Silpha perforata (Coleoptera, Silphidae, Silphinae)
Noritaka Ito; Toru Katoh; Norio Kobayashi; Haruo Katakura
ZOOLOGICAL SCIENCE, 27, 4, 313, 319, Apr. 2010, [Peer-reviewed], [International Magazine]
English, Scientific journal - Detection of ecological hybrid inviability in a pair of sympatric phytophagous ladybird beetles (Henosepilachna spp.)
Masakazu Kuwajima; Norio Kobayashi; Toru Katoh; Haruo Katakura
ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA, 134, 3, 280, 286, Mar. 2010, [Peer-reviewed], [International Magazine]
English, Scientific journal - Molecular phylogenetic analysis of three groups of Asian epilachnine ladybird beetles recognized by the female internal reproductive organs and modes of sperm transfer
Norio Kobayashi; Yuri Ohta; Toru Katoh; Sih Kahono; Sri Hartini; Haruo Katakura
JOURNAL OF NATURAL HISTORY, 43, 27-28, 1637, 1649, 2009, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - Comment on the proposed conservation of usage of Drosophila Fallén, 1823 (Insecta, Diptera)
van der Linde K; Bächli G; Toda MJ; Zhang WX; Katoh T; Hu YG; Spicer GS
Bulletin of Zoological Nomenclature, 65, 4, 304, 307, Dec. 2008, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - DNA analysis of insects using reflex bleeding
KATOH Toru; FURUKAWA Kota; KATAKURA Haruo
Japanese journal of entomology. New series, 11, 1, 25, 31, The Entomological Society of Japan, Mar. 2008, [Peer-reviewed], [Lead author], [Domestic magazines]
Japanese, Reflex bleeding is characteristic for a number of insect species such as ladybeetles and leaf beetles. In this study, we assessed the utility of reflex bleeding as a noninvasive source for DNA analysis. By using the method based on the nucleotide-acid binding property of silica particles, we were able to extract DNA from the reflex bleeding exuded by some ladybeetles. In addition, using the extracted DNA, we were able to amplify and determine the nucleotide sequences of 28S region. These results suggest that the reflex bleeding will be a useful source for analyzing DNA in insects without killing them. - Drosophila Fallén, 1832 (Insecta, Diptera): proposed conservation of usage
van der Linde K; Bächli G; Toda MJ; Zhang WX; Katoh T; Hu YG; Spicer GS
Bulletin of Zoological Nomenclature, 64, 4, 238, 242, Dec. 2007, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - Phylogeny of the Drosophila immigrans species group (Diptera : Drosophilidae) based on Adh and Gpdh sequences
Toru Katoh; Daisuke Nakaya; Koichiro Tamura; Tadashi Aotsuka
ZOOLOGICAL SCIENCE, 24, 9, 913, 921, Sep. 2007, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, Scientific journal - Genetic features of Khoton Mongolians revealed by SNP analysis of the X chromosome
T Katoh; S Mano; B Munkhbat; K Tounai; G Oyungerel; GT Chae; H Han; GJ Jia; K Tokunaga; N Munkhtuvshin; G Tamiya; H Inoko
GENE, 357, 2, 95, 102, Sep. 2005, [Peer-reviewed], [Lead author], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - Phylogeny and evolution of butterflies of the genus Parnassius: Inferences from mitochondrial 16S and ND1 sequences
Toru Katoh; Anton Chichvarkhin; Takashi Yagi; Keiichi Moto
ZOOLOGICAL SCIENCE, 22, 3, 343, 351, Mar. 2005, [Peer-reviewed], [Lead author, Corresponding author], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - Genetic features of Mongolian ethnic groups revealed by Y-chromosomal analysis
T Katoh; B Munkhbat; K Tounai; S Mano; H Ando; G Oyungerel; GT Chae; H Han; GJ Jia; K Tokunaga; N Munkhtuvshin; G Tamiya; H Inoko
GENE, 346, 63, 70, Feb. 2005, [Peer-reviewed], [Lead author], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - Notes on the maximum likelihood estimation of haplotype frequencies
S Mano; N Yasuda; T Katoh; K Tounai; H Inoko; T Imanishi; G Tamiya; T Gojobori
ANNALS OF HUMAN GENETICS, 68, 257, 264, May 2004, [Peer-reviewed], [International Magazine]
English, Scientific journal - Molecular systematics and evolution of the "Apollo" butterflies of the genus Parnassius (Lepidoptera : Papilionidae) based on mitochondrial DNA sequence data
K Omoto; T Katoh; A Chichvarkhin; T Yagi
GENE, 326, 141, 147, Feb. 2004, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - Genetic isolates in East Asia: A study of linkage disequilibrium in the X chromosome
T Katoh; S Mano; T Ikuta; B Munkhbat; K Tounai; H Ando; N Munkhtuvshin; T Imanishi; H Inoko; G Tamiya
AMERICAN JOURNAL OF HUMAN GENETICS, 71, 2, 395, 400, Aug. 2002, [Peer-reviewed], [Lead author], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - Molecular phylogeny of butterflies Parnassius glacialis and P-stubbendorfii at various localities in East Asia
T Yagi; T Katoh; A Chichvarkhin; T Shinkawa; K Omoto
GENES & GENETIC SYSTEMS, 76, 4, 229, 234, Aug. 2001, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - Phylogenetic position of the subgenus Lordiphosa of the genus Drosophila (Diptera : Drosophilidae) inferred from alcohol dehydrogenase (Adh) gene sequences
T Katoh; K Tamura; T Aotsuka
JOURNAL OF MOLECULAR EVOLUTION, 51, 2, 122, 130, Aug. 2000, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, Scientific journal
- Host utilization and genetic differentiation in a sympatric pair of sibling drosophilid species
Katoh T; Mitsuhashi K; Izumitani H; Toda MJ, The Nature & Insects, 54, 1, 30, 33, Jan. 2019, [Invited], [Lead author, Corresponding author]
Japanese, Introduction commerce magazine, 11402226 - 同所的に生息する2種のヘラムシが見せる異なる集団構造
蛭田 眞平; 生駒 真帆; 加藤 徹; 柁原 宏; Dick Matthew H, うみうし通信, 96, 6, 8, Sep. 2017
水産無脊椎動物研究所, Japanese
- 多様性生物学特論Ⅰ, 2024年, 修士課程, 理学院
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- THE ZOOLOGICAL SOCIETY OF JAPAN
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- SOCIETY OF EVOLUTIONARY STUDIES, JAPAN
- 鳥とウモウダニの共生:鳥による個体数管理とそれを回避するウモウダニの生存戦略
科学研究費助成事業
Apr. 2024 - Mar. 2027
高木 昌興; 高久 元; 加藤 徹
日本学術振興会, 基盤研究(C), 北海道大学, Coinvestigator, 24K09602 - Host use and genetic differentiation of sympatric drosophilids
科学研究費補助金（基盤研究(C)）
Apr. 2016 - Mar. 2019
Toru Katoh
Ministry of Education, Culture, Sports, Science and Technology, Principal investigator, Competitive research funding - Establishing a novel method of molecular phylogenetic analysis based on comprehensive sequence data from a single gene to the whole genome
Grant-in-Aid for Scientific Research (B)
Apr. 2012 - Mar. 2016
Masanori Toda
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Competitive research funding - Anatomy of a Marine Dispersal Barrier
Grant-in-Aid for Scientific Research (B)
Apr. 2011 - Mar. 2016
Matthew H. Dick
Ministry of Education, Culture, Sports, Science and Technology, Competitive research funding - Origin and phylogeny of Scaptomyza (Diptera: Drosophilidae)
Grant-in-Aid for Scientific Research (C)
Apr. 2012 - Mar. 2015
Toru Katoh
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(C), 北海道大学, Principal investigator, Competitive research funding - Spatio-temporal dynamics of host-shift in Henosepilachna vigintioctopunctata now in progress in Southeast Asia
Grant-in-Aid for Scientific Research (B)
Apr. 2011 - Mar. 2014
Haruo Katakura
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Competitive research funding - Evolutionary genetics of mycophagy in Drosophilidae
Grant-in-Aid for Encouragement of Young Scientists (B)
Apr. 2010 - Mar. 2012
Toru Katoh
In order to study the evolution of mycophagy in Drosophilidae, I reconstructed the phylogenetic tree for several mycophagous and non-mycophagous species of Drosophilidae. In the phylogenetic tree, mycophagous species did not regarded as a monophyletic group. This result suggests that the mycophagous character occurred several times independently. Next, in order to identify the genetic basis of mycophagy, I compared the nucleotide sequences of some candidate genes between the mycophagous and non-mycophagous species in Drosophilidae. However, I fail to detect any variant specific to mycophagy. Therefore, more analyses will be required to solve this problem.
Ministry of Education, Culture, Sports, Science and Technology, Grant-in-Aid for Young Scientists (B), Hokkaido University, Principal investigator, Competitive research funding, 22770072 - Phylogeny reconstruction and taxonomic revision of the genus Drosophila by super-tree and -matrix analyses
Grant-in-Aid for Scientific Research (C)
Apr. 2008 - Mar. 2011
Yao-Gang Hu
With a perspective of revising the classification system of the whole genus Drosophila, which includes a famous model organism, D. melanogaster, some unsolved problems in its phylogeny were addressed using DNA molecular information. In addition, we developed a novel, sequence-partitioning procedure for phylogenetic tree construction by the Neighbor Joining (NJ) method, to cope with heterogeneous evolutionary processes in different gene regions. Our novel method for NJ tree construction will be useful in saving time of computation, in comparison to other methods, from a huge dataset based on genome-scale sequences, which are now becoming available but include many regions under heterogeneous evolutionary processes.
Ministry of Education, Culture, Sports, Science and Technology, Grant-in-Aid for Scientific Research (C), Hokkaido University, Competitive research funding, 20570080 - Genetic basis of host sifts in phytophagous insects
Grants-in-Aid for Scientific Research (B)
Apr. 2007 - Mar. 2010
Toru Katoh
Extent of genetic differentiation between two sympatric ladybird beetles, Henosepilachna niponica and H. yasutomii, which are thought to be reproductively isolated from each other by their host preferences alone, was assessed using microsatellite markers established in this project. The analyzed data revealed that the genetic variation both within and between species were very low. These results suggest that the speciation of two species would have occurred so recently with short time that there is little genetic differentiation between them, except for a number of genes associated with the...
Ministry of Education, Culture, Sports, Science and Technology, 若手研究(B), 北海道大学->首都大学東京->北海道大学, Principal investigator, Competitive research funding, 19770060 - Evolutionary history of the Drosophilids diversity in the Asian region : For the comprehensive understanding.
Grants-in-Aid for Scientific Research (B)
Apr. 2007 - Mar. 2010
Tadashi Aotsuka; Masanori TODA; Hideaki WATABE; Masahito KIMURA; Hisaki TAKAMORI; Masako YAFUSO; Toru KATOH
This project aims to develop a new cooperative study on the evolutionary biology of drosophilids in the Asian region. During the term of this project, field surveys at many nature reserves in southeastern China, Indonesia, Vietnam and Malaysia were performed. By studying phylogenetic relationships of some Asian drosophilid groups, it was revealed that the largest genus Drosophila in the family Drosophilidae and its subgenus Sophophora including Drosophila melanogaster are paraphyletic, suggesting the necessity of revising the classification system of the whole family. Moreover, many new kno...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 首都大学東京, Coinvestigator not use grants, Competitive research funding, 19405013 - Speciation in phytophagous insects : Assessment of manifold effects of host change on reproductive isolation
Grants-in-Aid for Scientific Research (A)
Apr. 2006 - Mar. 2010
Haruo Katakura; Tadashi AOTSUKA; Susumu NAKANO; Naoyuki FUJIYAMA; Toru KATOH
Effects of host change on the reproductive isolation of phytophagous specialists were studied using phytophagous ladybird beetles and leaf beetles. Host shift has resulted in nearly complete reproductive isolation between two pairs of specialist species/populations by ecological isolation. In addition, in temperate regions, phenological differences between two potential host plants affected oviposition and/or diapause schedules of phytophages. Examples were also given for parallel host shift, rapid host shift, beetle plasticity in ability to utilize various potential host plants, and effect...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(A), 北海道大学, Coinvestigator not use grants, Competitive research funding, 18207005
