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Spontaneous polyploidization in critically endangered Acipenser mikadoi

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Title: Spontaneous polyploidization in critically endangered Acipenser mikadoi
Authors: Havelka, Miloš Browse this author
Zhou, He Browse this author
Hagihara, Seishi Browse this author
Ichimura, Masaki Browse this author
Fujimoto, Takafumi Browse this author
Yamaha, Etsuro Browse this author →KAKEN DB
Adachi, Shinji Browse this author →KAKEN DB
Arai, Katsutoshi Browse this author →KAKEN DB
Keywords: Acipenseriformes
DNA content
Unreduced gamete
Genome duplication
Second polar body
Issue Date: Jul-2017
Journal Title: Fisheries Science
Volume: 83
Issue: 4
Start Page: 587
End Page: 595
Publisher DOI: 10.1007/s12562-017-1083-3
Abstract: We investigated the source of spontaneous polyploidization in the critically endangered Acipenser mikadoi. Fourteen sib progeny of A. mikadoi and 11 hybrids between an A. mikadoi female and a Huso dauricus male, all showing atypically high ploidy, were analysed. Parent assignment based on five highly polymorphic microsatellite markers confirmed spontaneous duplication of maternal chromosome sets via retention of the second polar body to be the source of spontaneous polyploidization. To our knowledge, this provides the first evidence of the maternal origin of spontaneous polyploidization in A. mikadoi. Factorial correspondence analysis of the multilocus microsatellite genotypes placed the parent fish of spontaneous polyploids in clearly delineated clusters of A. mikadoi and H. dauricus, and parent fish had mitochondrial control region haplotypes corresponding to their presumed species. Thus, parent fish were confirmed to be of pure genetic origin, and hybridization did not promote the observed spontaneous polyploidization.
Rights: The final publication is available at via
Type: article (author version)
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 荒井 克俊

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