Fifth Fugu Genome assembly v5 made available by the Institute of Molecular and Cell Biology (IMCB) in July 2010. The fugu (Takifugu rubripes or Fugu rubripes) genome project was initiated in 1989. In 1993, researchers showed that the fugu genome is only 390 Mb, yet it contains a similar repertoire of genes to humans, which is useful for discovering genes and gene regulatory elements in the human genome. Fugu is the second vertebrate genome to be sequenced, the first being the human genome. A ‘draft’ sequence of the fugu genome was determined by the International Fugu Genome Consortium in 2002 using the 'whole-genome shotgun' sequencing strategy. In the latest version, some gaps in the fugu assembly v4 have been filled and the scaffolds have been organized into chromosomes based on a genetic map of the fugu (a collaborative project between IMCB and University of Tokyo). The v5 assembly comprises 7,118 scaffolds covering 392 Mb. About 72% of the assembly (281,557,002 bp) is organized into 22 chromosomes. Another 14% of the assembly (55,560,038 bp) is assigned to chromosomes but the orientation and order of the scaffolds are not known (Chr_n_un). The remaining 14% of the assembly (54,753,918 bp) is concatenated into a single sequence (Chr_un).
