Kiyoshi Naruse

DeepLabCut-based automated system reveals diverse temperature tolerance among medaka strains and related Oryzias species

Yoshiya Matsuo, Takuya Kato, Kiyoshi Naruse, Takashi Yoshimura et autres

Temperature is a critical environmental factor influencing the physiology and behavior of ectothermic animals, yet conventional methods for evaluating thermal tolerance in fish rely on subjective manual observation of loss of equilibrium (LOE), limiting experimental throughput and introducing observer bias. Here, we …

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MIT / TFE family transcription factors, Mitf and Tfec, redundantly promote pigment cell differentiation and retinal epithelium pigmentation in teleosts

James Lister, Keisuke Sugiwaka, Tetsuaki Kimura, Rieko Tanaka et autres

BACKGROUND: Transcription factors of the MIT/TFE family-mitfa, mitfb, and tfec-play essential roles in specifying pigment cells derived from neural crest cells in vertebrates. In teleosts, which possess multiple pigment cell types, these factors exhibit partially redundant but largely distinct functions across different …

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A genome-wide phylogeny of the family Adrianichthyidae and redescription of the monotypic Horaichthys setnai

V K Anoop, Ryo Kakioka, Rieko Tanaka, Kiyoshi Naruse et autres

Abstract The family Adrianichthyidae comprises over 40 species distributed across East, South-East, and South Asia and represents an important system for studying evolutionary diversification in tropical and subtropical regions. However, incongruences between morphology-based taxonomy and molecular phylogenies remain unresolved, particularly regarding the …

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Complete sequencing of medaka genomes reveals the architecture of centromeric satellites, giant mobile elements, and sex chromosomes

Yoshihiko Suzuki, Kazuki Ichikawa, Yusuke Inoue, Chie Owa et autres

Medaka ( Oryzias latipes ) is a small freshwater teleost widely used as a vertebrate model organism. Existing medaka reference genomes, however, contain many gaps and unresolved repetitive regions, hindering precise genome annotation and comparative analyses. Here we present one complete and …

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The complete sequence of the silkworm W chromosome uncovers its rapid evolution by large-scale duplications/deletions and translocation of W-linked genes

Wanshun Li, Hiroaki Abe, Yue Chen, J Liu et autres

The complete sequence of the W chromosome, which carries feminization activity in the silkworm, is crucial for understanding the sex-determination system in Lepidoptera. However, extensive accumulation of transposons due to lack of recombination, the very rare protein-coding genes and almost no information …

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Oxytocin regulates TN-GnRH3 circuit maturation and mate preference through C1q-dependent synaptic mechanisms

Maya Hasegawa, Moyu Oshita, Kiyoshi Naruse, Kjetil Hodne et autres

Abstract Oxytocin is a key regulator of social behavior, yet how it shapes the neural circuits underlying these behaviors remains unclear. Here, we show that oxytocin signaling is required for the proper maturation of terminal nerve gonadotropin-releasing hormone 3 (TN-GnRH3) circuits that …

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Computer‐Aided Sperm Analysis Protocol for Evaluating Sperm Motility in Japanese Medaka

Miwa Kuroyanagi, Satoshi Ansai, Keigo Okamoto, Ai Kato et autres

Changes in sperm motility can serve as an early indicator of reproductive effects caused by environmental chemicals or genetic perturbations. However, sperm motility is highly sensitive to external factors such as osmolarity, ionic composition, and the timing of measurement after activation, making …

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Plasticity-led evolution of the gut length in wild medaka

Kiyoshi Naruse, Hiroyuki Takeda

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Linked genetic loci and genotype-dependent temperature effects shape craniofacial morphology in medaka

Minori Shinya, Tetsuaki Kimura, Takafumi Ikeda, Ryohei Nakamura et autres

Craniofacial morphology is a fundamental and complex trait, vital for survival and crucial for social interactions such as individual recognition and mate selection. While its overall form is conserved within a species, significant individual diversity exists, controlled by both genetic and environmental …

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Medaka: a novel model for analyzing genome–environment interactions

Kiyoshi Naruse, Felix Loosli, Satoshi Ansai, Ewan Birney et autres

Medaka is an established vertebrate model system for biological and biomedical research. It possesses unique features that make it particularly suitable for studying genome-environment interactions. Endemic to habitats spanning from 4 to 40°C and varying salinities, it combines broad ecological adaptability with …

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A genetic model of congenital intestinal atresia implicates Mypt1 in epithelial organisation

Daisuke Kobayashi, Akihiro Urasaki, Tetsuaki Kimura, Satoshi Ansai et autres

Congenital intestinal atresia (IA) is a birth defect characterised by the absence or closure of part of the intestine. Although genetic factors are implicated, mechanistic understanding has been hindered by the lack of suitable animal models. Here, we describe a medaka (Oryzias …

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Genomic consequences of domestication and the diversification of body coloration and morphology in ornamental medaka strains

Tetsuo Kon, Rui Tang, Koto Kon‐Nanjo, Soma Tomihara et autres

Ornamental medaka strains derived from wild Japanese medaka (Oryzias latipes species complex) are bred worldwide. Over 200 years of selective breeding have produced over 700 strains with a wide variety of phenotypes, including diverse body coloration, scales, eyeball morphology, and fin and …

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