DOI: 10.1073/pnas.2008037117
论文题名: Neutral evolution of human enamel-dentine junction morphology
作者: Monson T.A. ; Fecker D. ; Scherrer M.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期: 42 起始页码: 26183
结束页码: 26189
语种: 英语
英文关键词: Dentition
; Genetic structure
; Geometric morphometrics
; Neutral evolution
; Phenetic variation
Scopus关键词: Africa
; article
; dentin
; enamel
; expectation
; gene structure
; genetic variation
; hominid
; human
; Late Holocene
; major clinical study
; morphometry
; nonhuman
; tooth development
; anatomy and histology
; Asia
; Australia
; dentin
; enamel
; Europe
; evolution
; fossil
; physical anthropology
; Western Hemisphere
; Africa
; Americas
; Asia
; Australia
; Biological Evolution
; Dental Enamel
; Dentin
; Europe
; Fossils
; Humans
; Paleodontology
英文摘要: Teeth have been studied for decades and continue to reveal information relevant to human evolution. Studies have shown that many traits of the outer enamel surface evolve neutrally and can be used to infer human population structure. However, many of these traits are unavailable in archaeological and fossil individuals due to processes of wear and taphonomy. Enamel-dentine junction (EDJ) morphology, the shape of the junction between the enamel and the dentine within a tooth, captures important information about tooth development and vertebrate evolution and is informative because it is subject to less wear and thus preserves more anatomy in worn or damaged specimens, particularly in mammals with relatively thick enamel like hominids. This study looks at the molar EDJ across a large sample of human populations. We assessed EDJ morphological variation in a sample of late Holocene modern humans (n = 161) from archaeological populations using μ-CT biomedical imaging and geometric morphometric analyses. Global variation in human EDJ morphology was compared to the statistical expectations of neutral evolution and "Out of Africa" dispersal modeling of trait evolution. Significant correlations between phenetic variation and neutral genetic variation indicate that EDJ morphology has evolved neutrally in humans. While EDJ morphology reflects population history, its global distribution does not follow expectations of the Out of Africa dispersal model. This study increases our knowledge of human dental variation and contributes to our understanding of dental development more broadly, with important applications to the investigation of population history and human genetic structure. © 2020 National Academy of Sciences. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163988
Appears in Collections: 气候变化与战略
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作者单位: Monson, T.A., Department of Anthropology, Western Washington University, Bellingham, WA 98225, United States; Fecker, D., Department of Anthropology, Universität Zürich, Zürich, CH-8057, Switzerland; Scherrer, M., Department of Anthropology, Universität Zürich, Zürich, CH-8057, Switzerland
Recommended Citation:
Monson T.A.,Fecker D.,Scherrer M.. Neutral evolution of human enamel-dentine junction morphology[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(42)