In this study, the identification of the whole Hox gene clusters (46 Hox genes) in the marine medaka Oryzias melastigma was investigated using genome assembly and RNA-seq information. Moreover, the gene loss events of Hox gene clusters, which may occur during fish evolution, were examined for a better understanding of the evolutionary status of the gene lost events of the Hox gene cluster across fish species, particularly in the genus Oryzias.
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