The Allelic Correlation Structure of Gainj-and Kalam-Speaking People. I. the Estimation and Interpretation of Wright's F-Statistics
AUTOR(ES)
Long, Jeffrey C.
RESUMO
The internal patterning of allelic correlations in the Gainj and Kalam swidden horticulturalists of highland Papua New Guinea is examined within the context of Sewall Wright's F-statistic model. A multiallelic extension of the model is given first, and multivariate variance-component estimators for the parameters are suggested. Then, it is shown that the expectation of the F-statistic set depends on the age structure of the population and that knowledge of the population and sample age structure is critical for meaningful analysis. The array of F-statistics estimated jointly over five polymorphic enzyme loci reveals the following features of Gainj and Kalam population structure: (1) significant departures from panmictic expectations and (2) characteristics of a continuously distributed breeding population, rather than those expected for populations subdivided into demes with discrete boundaries. Finally, the F-statistics estimated for the Gainj and Kalam are briefly compared to estimates obtained from other tribal populations. It is seen that the level of differentiation observed in the Gainj and Kalam is only about one-third that observed in South American swidden horticulturalists. Consequently, some conventional wisdom regarding the interrelationship of socioecological settings and genetic structures may require reevaluation.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1202767Documentos Relacionados
- The Allelic Correlation Structure of Gainj- and Kalam-Speaking People. II. the Genetic Distance between Population Subdivisions
- Effective Size and F-Statistics of Subdivided Populations. I. Monoecious Species with Partial Selfing
- Genetic Differentiation and Estimation of Gene Flow from F-Statistics under Isolation by Distance
- Effective Size and F-Statistics of Subdivided Populations. II. Dioecious Species
- The Genetic Structure of a Tribal Population, the Yanomama Indians. VI. Analysis by F-Statistics (Including a Comparison with the Makiritare and Xavante