Tooth scaling and evolutionary dwarfism: an investigation of allometry in human pygmies.
Tooth scaling and evolutionary dwarfism: an investigation of allometry in human pygmies.
复制标题
牙齿脱落和进化侏儒症：对侏儒人类异速生长的研究。
DOI：
10.1002/ajpa.1330770117
复制
发表时间：
1988
影响因子：
2.8
通讯作者：
Gomez,AM
中科院分区：
文献类型：
--
作者：
Shea,BT;Gomez,AM
古尔德预测，在迅速矮化的谱系中，犬齿后的牙齿呈现出与正常种间趋势不同的比例模式。他关于强负异速生长的预测并没有经常在定量的细节上得到检验。在这里，我们提出了非洲俾格米人的臼齿与其他非洲人的较大尺寸和菲律宾俾格米人与菲律宾人的较大尺寸相比，缩放分析的结果。在这两种比较中，我们发现牙齿大小与头骨和身体大小的负向异速生长模式。这种缩放模式的解释，在这些人群中的矮化求助于发展基地（已知或推断）。体型缩小与低水平的生长控制物质胰岛素样生长因子I（IGF-I）有关，这似乎不会影响牙列的大小。这些发展信息的影响，我们的理解异速生长模式的一般，特别是矮化事件，进行了讨论。
Gould has predicted that in rapidly dwarfed lineages the postcanine teeth exhibit a different scaling pattern than is the normal interspecific trend. His prediction of strong negative allometry has not been frequently tested in quantitative detail. Here we present results of scaling analyses of the molar teeth in African pygmies compared with other Africans of larger size and in Philippine pygmies compared with Filipinos of larger size. We find a pattern of strong negative allometry of tooth size to skull and body size in both these comparisons. This scaling pattern is explained by recourse to the developmental bases (known or inferred) of dwarfing in these populations. Body size decrease is related to low levels of the growth control substance insulin‐like growth factor I (IGF‐I), which does not appear to affect the size of the dentition. The implications of such developmental information for our understanding of allometric patterns in general, and dwarfing events in particular, are discussed.