著者

OSAMU KONDO HITOSHI FUKASE TAKASHI FUKUMOTO

出版者

The Anthropological Society of Nippon

雑誌

Anthropological Science (ISSN:09187960)

巻号頁・発行日

vol.125, no.2, pp.85-100, 2017 (Released:2017-09-21)

参考文献数

43

被引用文献数

4 8

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Considering the geographical setting of the Japanese archipelago at the periphery of the Asian continent, regional variation in Jomon phenotypes can be interpreted as an outcome of population history. In this paper, we focused on regional variation in the Jomon craniofacial morphology and assumed that the observed regional differences were a reflection of the formation process of the Jomon population, which is a mixture of intrinsic expansion of an initial population with extrinsic influence of hypothetical gene flow. Compiled craniometric data from archeological site reports indicate that Jomon skulls, especially in the neurocranium, exhibit a discernible level of northeast-to-southwest geographical cline across the Japanese archipelago, placing the Hokkaido and Okinawa samples at both extreme ends. A quantitative genetic approach using an R-matrix method indicates that the cranial parts of the neurocranium and mandible exhibit a proportionately larger regional variation, the former of which confirms a trend of geographical cline and reveals the respective region presumably having different population histories with their respective local backgrounds. The following scenarios can be hypothesized with caution: (a) the formation of Jomon population seemed to proceed in eastern or central Japan, not western Japan (Okinawa or Kyushu regions); (b) the Kyushu Jomon could have a small-sized and isolated population history; and (c) the population history of Hokkaido Jomon could have been deeply rooted and/or affected by long-term extrinsic gene flows.

著者

MASATOMI KUDAKA HITOSHI FUKASE RYOSUKE KIMURA TSUNEHIKO HANIHARA HIROFUMI MATSUMURA AIKO SASO TADAHIKO FUKUMINE HAJIME ISHIDA

出版者

日本人類学会

雑誌

Anthropological Science (ISSN:09187960)

巻号頁・発行日

pp.121125, (Released:2013-02-19)

被引用文献数

6 13

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Twelve metric variables of the humerus, radius, femur, and tibia were investigated in 11 male samples from northeastern and eastern Asian populations. Variations among regions and correlations between latitude and respective measurements and indices were calculated and a principal component analysis was conducted to elucidate human limb bone characteristics. Significant correlation and marginally significant correlation were found for the maximum subtrochanteric diameter (r = 0.662, P = 0.027) and the platymeric index (r = -0.583, P = 0.060) with latitude, respectively, suggesting that the femur of northern Asians had a wide and flat subtrochanteric shape. The second principal component of the principal component analysis shows that the northeastern samples with comparatively long shaft length and thin and flat shaft diameters were discriminated from the southern samples; the second principal component was significantly correlated with latitude (r = -0.743, P = 0.009). The estimated Fst value of 0.432–0.336 shows that the variation in limb bone measurements across regions is rather large, at approximately two or three times the low levels of interregional variation (0.078–0.180) in analyses of cranial and dental data. Limb bone morphology has been repeatedly proposed to be more strongly influenced by environmental and nutritional factors than cranial and dental traits, but this study is the first to confirm it on the basis of statistical analysis.

著者

NARUYA SAITOU RYOSUKE KIMURA HITOSHI FUKASE AKIRA YOGI SADAYUKI MURAYAMA HAJIME ISHIDA

出版者

日本人類学会

雑誌

Anthropological Science (ISSN:09187960)

巻号頁・発行日

vol.119, no.3, pp.231-237, 2011 (Released:2011-12-21)

参考文献数

62

被引用文献数

2 5 3

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Two mainland Japanese males were examined with a computer tomography (CT) X-ray scanner to reconstruct three-dimensional CT simulation images of their cranial anatomy and to check for the presence/absence of 23 nonmetric cranial traits. Surface anatomy for scoring 19 nonmetric cranial variations was clearly observed among the 23 variations. Evaluation of the four other traits might have been disturbed due to dental treatment history, small variations in the images, or X-ray radiation condition. However, these disturbances could be overcome by a combination of simple thin-sliced CT images and magnetic resonance imaging. We have thus developed a new anatomical field for elucidating human morphology.