利根川河口域に分布するウスシジミ・タイワンシジミの減数分裂過程

DOI 日本農学文献記事索引 Web Site 被引用文献4件 参考文献18件

書誌事項

タイトル別名
  • The Meiotic Process of the Zygotes from Two Corbicula Species in Tone River
  • トネガワ カコウイキ ニ ブンプ スル ウスシジミ タイワンシジミ ノ ゲンスウ ブンレツ カテイ

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抄録

The processes of meiosis and fertilization in exotic species Corbicula fluminea and C. papyracea collected at Tone River were compared with that of domestic C. japonica. Microfluorometric analyses revealed that C. fluminea included diploids and triploids and both produced non-reductional sperm. The eggs from C. fluminea showed androgenetic process. They extruded all maternal chromosomes at first meiosis as two first polar bodies. On the contrary, C. papyracea and C. japonica were diploids and produced haploid sperm. In both species the eggs showed normal process of meiosis and fertilization (i.e. formation of first and second polar bodies and female pronucleus) . The eggs from C. japonica inseminated by sperms from C. papyracea showed normal development up to D-shaped veliger larvae. This result suggests that hybridization of both species may occur at Tone River.

収録刊行物

  • 水産増殖

    水産増殖 54 (2), 125-134, 2006

    日本水産増殖学会

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