Assessment of homozygosity levels in the mito-gynogenetic torafugu (Takifugu rubripes) by genome-wide SNP analyses

Hong Zhang, Yusuke Hirose, Rintaro Yoshino, Shigeharu Kinoshita, Kazuyoshi Saito, Engkong Tan, Yutaka Suzuki, Atsushi Shimizu, Hideyuki Okano, Jun Kudoh, Shugo Watabe, Shuichi Asakawa

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


The compact genome of torafugu (Takifugu rubripes) is a useful model for annotating the vertebrate genomes. However, the currently incomplete assembly of the torafugu genome has decreased its value for genetic and genomic analyses. This is partly due to the usage of naturally heterozygous diploid genome as a starting material. Therefore, we generated mito-gynogenetic torafugu using the eggs fertilized by UV-irradiated sperm, followed by cold shock treatment. After a preliminary confirmation of homozygosity by microsatellite genotyping in one mito-gynogenetic torafugu, genome-wide single nucleotide polymorphism (SNP) analyses were employed for an accurate assessment of whole-genome homozygosity levels. SNP genotyping results indicated that the torafugu obtained through mitotic gynogenesis induction was doubled haploid. We report the first instance of assessing homozygosity levels by genome-wide SNP analyses in mito-gynogenetic fishes.

Original languageEnglish
Pages (from-to)114-119
Number of pages6
Publication statusPublished - 2013 Mar 4


  • Doubled haploid
  • Homozygosity
  • Mitotic gynogenesis
  • Next-generation sequencing
  • Single nucleotide polymorphism
  • Torafugu (Takifugu rubripes)

ASJC Scopus subject areas

  • Aquatic Science


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