Chiasma analyses of the parasite flukes, Schistosoma and Paragonimus(Trematoda), by using the chiasma distribution graph

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Chiasma frequency and chiasma distribution pattern of three parasite flukes, <i>Schistosoma mansoni</i> (n=8), <i>S. japonicum</i> (n=8), and <i>Paragonimus ohirai</i> (n=11) were investigated by using the chiasma distribution graph. It was revealed that there is a minimum value of interference distance between two interstitial chiasmata in each bivalent (1.8% of the total bivalent length), but frequency distributions of interstitial chiasmata are random and almost uniform except the centromere and telomere regions in which chiasma formation is suppressed. As no chiasma terminalization was detected, the so-called terminal chiasma were best interpreted by an achiasmatic terminal association resulting from the telomerenuclear membrane association. The mean chiasma frequency per cell estimated from interstitial chiasmata is 15.3 in <i>S. mansoni</i> and <i>P. ohirai</i>, but very low (3.0) <i>in</i> <i>S. japonicum</i>. A genetic mechanism controlling the level of chiasma frequency was discussed with reference to the results in mammals.<br>

収録刊行物

  • Genes & genetic systems

    Genes & genetic systems 71(3), 181-188, 1996-06

    The Genetics Society of Japan

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各種コード

  • NII論文ID(NAID)
    10003759886
  • NII書誌ID(NCID)
    AA11077421
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13417568
  • NDL 記事登録ID
    4163720
  • NDL 雑誌分類
    ZR1(科学技術--生物学)
  • NDL 請求記号
    Z53-W539
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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