SINE挿入を指標とした系統解析によって明らかとなったヒゲクジラ類の系統関係と過去の急速な放散(<特集>生物イベントとしての哺乳類の海生適応)  [in Japanese] Phylogenetic reconstruction of baleen whales and detection of their past extensive radiation event by the SINE insertion analysis  [in Japanese]

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Author(s)

    • 二階堂 雅人 Nikaido Masato
    • 東京工業大学大学院生命理工学研究科:統計数理研究所予測制御研究系 Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology:The institute of Statistical Mathematics
    • 牧野 瞳 [他] Makino Hitomi
    • 東京工業大学大学院生命理工学研究科 Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology
    • 岡田 典弘 Okada Norihiro
    • 東京工業大学大学院生命理工学研究科:基礎生物学研究所細胞情報研究部門 Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology:Department of Cell Biology, National Institute for Basic Biology

Abstract

Baleen whales (suborder Mysticeti) comprise eleven extant species that are classified into four families. Although several phylogenetic hypotheses about these taxa have been proposed, their phylogenetic relationships still remain confusing. SINE (short interspersed repetitive element) insertion data are now regarded as almost ideal shared derived characters at the molecular level, and we have applied this method to this problem. Here, we successfully reconstruct the phylogenetic relationships of these whales by characterizing 40 informative SINE loci. One of the intriguing conclusions is that balaenopterids and eschrichtiids radiated very rapidly during a very short evolutionary period. During this period, when newly inserted SINE loci retained ancestral polymorphisms, speciation occurred and these SINEs were sorted incompletely into each lineage, thus resulting in inconsistencies regarding the presence or absence of the SINE. This is in sharp contrast to the phylogeny of toothed whales, for which no SINE inconsistencies have been found. Furthermore, we found monophyletic groupings between humpback and fin whales, and also between (sei + Bryde's) and blue whales, both of which have not previously been recognized. The comprehensive SINE insertion data, together with the mitochondrial DNA phylogeny that was recently completed, provide a nearly complete picture of the evolutionary history of baleen whales.

Journal

  • Fossils

    Fossils 77(0), 22-28, 2005

    Palaeontological Society of Japan

References:  40

Cited by:  1

Codes

  • NII Article ID (NAID)
    110002704347
  • NII NACSIS-CAT ID (NCID)
    AN00041606
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0022-9202
  • NDL Article ID
    7323394
  • NDL Source Classification
    ZR1(科学技術--生物学) // ZM41(科学技術--地球科学)
  • NDL Call No.
    Z18-838
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
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