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Non-motile tetraploid spermatozoa of Misgurnus loach hybrids

Arai Zhao et al R2 ver.pdf941.7 kBPDF見る/開く

タイトル: Non-motile tetraploid spermatozoa of Misgurnus loach hybrids
著者: Zhao, Yan 著作を一覧する
Fujimoto, Takafumi 著作を一覧する
Psenicka, Martin 著作を一覧する
Saito, Taiju 著作を一覧する
Arai, Katsutoshi 著作を一覧する
キーワード: Meiosis
発行日: 2016年 1月
出版者: Springer
誌名: Fisheries science
巻: 82
号: 1
開始ページ: 127
終了ページ: 135
出版社 DOI: 10.1007/s12562-015-0939-7
抄録: We have compared various properties of spermatozoa from the wild diploid male pond loach Misgurnus anguillicaudatus to those from the interspecific male hybrid of the cross between a female M. anguillicaudatus and a male mud loach M. mizolepis. Our results show that spermatozoa from this interspecific hybrid had poor motility, low viability, abnormal morphology, a larger volume of mitochondrial mass per cell and higher ATP content of spermatozoa with tetraploid DNA content, and they were present at a low concentration. The interspecific hybrid males produced spermatozoa with a larger head, with either no flagellum (36.4 %), one flagellum (46.7 %) or two flagella (16.9 %). These flagella were shorter than those of the normal wild-type male M. anguillicaudatus and often presented with abnormalities in microtubule structure. An abnormally shorter flagellum has difficulty in propelling tetraploid spermatozoa with an increased head size in normal progressive motility, although they had higher energy, as shown by their larger volume of mitochondrial mass and higher ATP content. These tetraploid spermatozoa are likely produced by the arrest of the regular meiotic division after chromosomal replication, followed by abnormal spermiogenesis.
Rights: The final publication is available at via
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 荒井 克俊


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