Lukacs J R, Hemphill B E
Department of Anthropology, University of Oregon, Eugene 97403.
Hum Biol. 1993 Apr;65(2):279-325.
Current knowledge of odontometric variation among the people of south Asia is limited, yet variation in tooth size has the potential to answer important questions regarding genetic relationships among contemporary social groups. Here, we report tooth crown diameters for 3 ethnic groups (Bhils, Garasias, Rajputs) from Gujarat State and contrast these data with 10 social groups from north, northwestern, northeastern, west-central, and south India. Univariate descriptive and inferential statistics are presented by group and by sex. Examination of crown diameters demonstrates that tooth size differs significantly between social groups in Gujarat. Cluster analysis of sex-standardized odontometric mean parameter values indicates that in apportionment of tooth size throughout the dentition low-status Garasias are slightly more similar to tribal Bhils than they are to high-status Rajputs. Principal components analysis by sex identifies three components that together account for 58.2% and 56.3% of the total variance among Gujarati females and males, respectively. These components are identified as overall size, a dimensional contrast between mesiodistal diameters and buccolingual diameters, and a dimensional contrast between mesiodistal diameters and buccolingual diameters among anterior teeth coupled with a contrast between anterior teeth (incisors, canines) and posterior teeth (premolars, molars). Ordination of group component scores indicates that (1) males and females of each social group exhibit a pattern of tooth size apportionment most similar to the opposite member of that same social group and (2) low-status Garasias exhibit a tooth size apportionment profile intermediate between tribal Bhils and high-status Rajputs. To place this pattern of odontometric variation among modern Gujaratis in larger perspective, data from Gujarati males were contrasted against males from 10 social groups from north, northwestern, northeastern, west-central, and south India. Cluster analysis of group-standardized odontometric mean parameter values indicates that (1) Gujarati social groups, regardless of social status or caste adherence, are more similar to one another than to any other group included in this analysis and (2) Gujarati social groups share closet affinities with geographically proximate social groups (Ahirs, Jats, Kunbis). Principal components analysis yields three components that combine to explain 64.0% of the total variance. These components are interpreted as a dimensional contrast among posterior teeth, a dimensional contrast among nonmolar teeth, and a contrast between anterior and posterior teeth. Ordination of group component scores indicates that tribal Bhils possess tooth size apportionment profiles that are different from other Indian tribal groups but are proximate to those found among Gujarati Hindu groups.(ABSTRACT TRUNCATED AT 400 WORDS)
目前关于南亚人群牙齿测量变异的知识有限，然而牙齿大小的变异有可能回答有关当代社会群体之间遗传关系的重要问题。在此，我们报告了古吉拉特邦3个族群（比尔族、加拉西亚族、拉杰普特族）的牙冠直径，并将这些数据与来自印度北部、西北部、东北部、中西部和南部的10个社会群体的数据进行对比。按群体和性别呈现单变量描述性和推断性统计数据。对牙冠直径的检查表明，古吉拉特邦不同社会群体之间的牙齿大小存在显著差异。对性别标准化牙齿测量平均参数值的聚类分析表明，在整个牙列的牙齿大小分配方面，地位较低的加拉西亚族与部落比尔族的相似度略高于与地位较高的拉杰普特族。按性别进行的主成分分析确定了三个成分，它们分别占古吉拉特邦女性和男性总方差的58.2%和56.3%。这些成分被确定为总体大小、近远中直径与颊舌直径之间的维度对比，以及前牙近远中直径与颊舌直径之间的维度对比，再加上前牙（切牙、尖牙）与后牙（前磨牙、磨牙）之间的对比。群体成分得分的排序表明：（1）每个社会群体的男性和女性呈现出的牙齿大小分配模式与同一社会群体的异性成员最为相似；（2）地位较低的加拉西亚族呈现出的牙齿大小分配模式介于部落比尔族和地位较高的拉杰普特族之间。为了从更宏观的角度看待现代古吉拉特人这种牙齿测量变异模式，将古吉拉特邦男性的数据与来自印度北部、西北部、东北部、中西部和南部的10个社会群体的男性数据进行了对比。对群体标准化牙齿测量平均参数值的聚类分析表明：（1）古吉拉特邦的社会群体，无论社会地位或种姓归属如何，彼此之间的相似度高于本分析中包含的任何其他群体；（2）古吉拉特邦的社会群体与地理位置相近的社会群体（阿希尔族、贾特族、昆比族）关系最为密切。主成分分析产生了三个成分，它们共同解释了总方差的64.0%。这些成分被解释为后牙之间的维度对比、非磨牙之间的维度对比，以及前牙与后牙之间的对比。群体成分得分的排序表明，部落比尔族的牙齿大小分配模式与其他印度部落群体不同，但与古吉拉特邦印度教群体的模式相近。（摘要截取自400字）
