Heritabilities of human tooth dimensions
| Autor: | P. M. A. Tigerstedt, Lassi Alvesalo |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Male
Cephalometry Population Evolutionary change Mandible Biology 03 medical and health sciences Sex Factors stomatognathic system Human tooth Maxilla Genetics medicine Dentition Humans Odontometry 0601 history and archaeology education Finland 030304 developmental biology Orthodontics 0303 health sciences education.field_of_study 060101 anthropology 06 humanities and the arts General Medicine Anatomy Heritability Masticatory force stomatognathic diseases Dental arch Phenotype medicine.anatomical_structure Female |
| Zdroj: | Hereditas. 77:311-318 |
| ISSN: | 0018-0661 |
| DOI: | 10.1111/j.1601-5223.1974.tb00943.x |
| Popis: | The genetic influence on different human tooth dimensions was examined by using heritability estimates as an indication of genetic effect. A full-sib analysis was used to calculate the heritabilities. A clear range of variation of heritabilities between different teeth and dimensions was obtained, but not without systematic trends. Heritabilities were generally lower in distal members of the tooth group with the exception of lower incisors. In view of the phenotypic variability regarding size, form and existence of the different teeth in modern man, and in relation to the change of the teeth during evolution, it was suggested that the lowering of heritability could mean that the tooth in question is in the process of evolutionary change. The significance of teeth with low and high heritabilities in relation to the function and evolution of the masticatory apparatus was discussed in terms of fitness. The differences of heritabilities between teeth within a tooth group, rather than the position of the tooth in the dental arch, describes the changes in the relative phenotypic variability between different teeth in a given population at any point in time. |
| Databáze: | OpenAIRE |
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