Maximum genetic proportion of metric traits from different regions of the skull in ancient humanpopulations of Northwestern Argentina
Eur. j. anat
; 24(5): 415-428, sept. 2020. ilus, tab, graf
Artigo
em Inglês
| IBECS
| ID: ibc-195279
Biblioteca responsável:
ES1.1
Localização: BNCS
ABSTRACT
In order to explain the evolutionary process of ancient human populations that inhabited a specific geographical region from quantitative skull traits, it is advisable to know the evolutionary potential of metric characters. For this reason, the proportion of the maximum genetic variance or maximum heritability (h2m) of the variables studied was estimated. In addition, it was evaluated whether h2m changes between regions of the skull (face, base and vault) and the degree of association between the phenotypic variance and the maximum genetic variance. Twenty-one symmetrical variables on the left and right sides of the skull were measured in 245 skulls from five prehistoric samples from northwestern Argentina. The upper limit of heritability was estimated using the repeated measurement method. To test whether there are differences between the h2m of each group, the Kruskal-Wallis test was used. The maximum genetic values of each variable were obtained through a regression analysis (right measure on left measure). The relationship between phenotypic and maxi-mum genetic values was evaluated by correlation analysis. Significant bilateral difference is demon-strated in six of 21 characters. The average h2m is 0.77 and ranges between 0.58 and 0.93. The aver-age correlation between phenotypic values and maximum genotypic values was 0.8 (R2=0.65), suggesting that it is possible to make inferences of the genetic structure of the population from phenotypic information. The high proportion of maximum observed genetic variance indicates an important evolutionary potential of the craniofacial complex in ancient populations of northwestern Argentina
RESUMEN
No disponible
Texto completo:
Disponível
Coleções:
Bases de dados nacionais
/
Espanha
Base de dados:
IBECS
Assunto principal:
Fenótipo
/
Crânio
/
Variação Genética
/
Cefalometria
/
Variação Anatômica
Limite:
Feminino
/
Humanos
/
Masculino
País/Região como assunto:
América do Sul
/
Argentina
Idioma:
Inglês
Revista:
Eur. j. anat
Ano de publicação:
2020
Tipo de documento:
Artigo
Instituição/País de afiliação:
Universidad Nacional de Río Cuarto/Argentina