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Non-motile tetraploid spermatozoa of Misgurnus loach hybrids

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Title: Non-motile tetraploid spermatozoa of Misgurnus loach hybrids
Authors: Zhao, Yan Browse this author
Fujimoto, Takafumi Browse this author
Psenicka, Martin Browse this author
Saito, Taiju Browse this author
Arai, Katsutoshi Browse this author →KAKEN DB
Keywords: Meiosis
Issue Date: Jan-2016
Publisher: Springer
Journal Title: Fisheries science
Volume: 82
Issue: 1
Start Page: 127
End Page: 135
Publisher DOI: 10.1007/s12562-015-0939-7
Abstract: 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
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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