Ploidy manipulation using diploid sperm in the loach, Misgurnus anguillicaudatus : a review
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概要
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In the loach, Misgurnus anguillicaudatus (Teleoste: Cobitidae), diploid sperm can be obtained from natural tetraploid individuals with four sets of homologous chromosomes. Using diploid sperm, various kinds of polyploids and androgenetic diploids have been produced. Cryptic clonal lineages are also recognized in wild populations of the loach. They produce unreduced diploideggs genetically identical to somatic cells of the mother fish and most diploid eggs develop gynogenetically as a member of the clone. However, some eggs develop to triploid and/or diploid-triploid mosaic individuals by incorporation of sperm nucleus. Diploid-triploid mosaic males exclusively generate fertile diploid sperm with clonal genotypes. Such diploid sperm can also be obtained from artificially sex-reversed clonal individuals. Recent population studies suggested that Japanese M. anguillicaudatus might not be a single species, but a complexinvolving cryptic species, because wild populations exhibited genetic differentiation at interspecific level. This implies possible relationship between atypical reproduction and natural hybridization in the loach.
- Blackwell Publishingの論文
著者
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Morishima Kagayaki
Graduate School Of Fisheries Sciences Hokkaido University
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Yamaha Etsuro
Nanae Fresh Water Laboratory Field Science Center For Northern Biosphere Hokkaido University
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ARIAS-RODRIGUEZ Lenin
Graduate School of Fisheries Sciences, Hokkaido University
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Arias-rodriguez Lenin
Graduate School Of Fisheries Sciences Hokkaido University
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Arai K
Laboratory Of Breeding Science Graduate School Of Fisheries Science Hokkaido University
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