Non-metric dental variation of Sakishima Islanders, Okinawa, Japan : a comparative study among Sakishima and neighboring populations

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Twenty-four non-metric tooth crown traits of Miyako and Ishigaki Islanders, from the southernmost Ryukyu Islands, were investigated and compared with those of neighboring populations. The frequency of double-shoveling in Sakishima samples, and especially, Ishigaki Island, is lower than that found among Atayal people (Taiwan) and main-island Japanese. The frequencies of protostylid and cusp 6 in Miyako and Ishigaki Islanders are comparable to those in Hokkaido Ainu and lower than in main-island Japanese and Atayal. Miyako and Ishigaki Islanders, as well as other Ryukyuans, are basically more similar to main-island Japanese than to Ainu, while being situated between main-island Japanese and Ainu in terms of both mean measure of divergence (MMD) and R-matrix methods. However, Ishigaki and Miyako Islanders are relatively close to Hokkaido Ainu among Ryukyu people and main-island Japanese, as suggested in some previous preliminary studies. The estimated <i>Fst</i> (the ratio of among-group variation to total variation), using an average heritability rate = 0.55 for the non-metric tooth crown traits used in this study, displayed low levels of inter-regional variation, as already indicated in analyses of genetic, cranial and dental metric data. Meanwhile, the relatively large diversity of Ryukyu Islanders based on <i>Fst</i> suggested long-term isolation or poor intra-island contact among the Ryukyu Islands. The lower observed variation compared with the expected variation in most Ryukyu samples may reflect a greater degree of genetic drift in the Ryukyu Island chain.<br>

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  • Anthropological science : journal of the Anthropological Society of Nippon  

    Anthropological science : journal of the Anthropological Society of Nippon 115(1), 35-45, 2007-04-01 

    The Anthropological Society of Nippon

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各種コード

  • NII論文ID(NAID)
    10018910575
  • NII書誌ID(NCID)
    AA10915022
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09187960
  • NDL 記事登録ID
    8692959
  • NDL 雑誌分類
    ZS1(科学技術--人類学)
  • NDL 請求記号
    Z54-J370
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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