Isolation by distance, linguistic similarity, and the genetic structure on Bougainville Island

Relethford, John H.

doi:10.1002/ajpa.1330660309

Cited by 21 publications

(15 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This method was preferred to Pearson's product moment correlation ''r'' since it assumes only a monotonic relationship, not a linear one, between the variables (Pollard 1977, Relethford, 1985. While Spearman's was preferred for methodological reasons, it is worth noting that values obtained from our data set with the two methods were very similar, and most of the differences were due to a slightly greater value of Spearman's coefficients (data not shown).…”

Section: Data Analysesmentioning

confidence: 89%

The peopling of Sub-Saharan Africa: The case study of Cameroon

Spedini

Destro-Bisol

Mondovì

et al. 1999

Am. J. Phys. Anthropol.

View full text Add to dashboard Cite

This study analyzes the distribution of ten protein genetic polymorphisms in eighteen populations from the most densely inhabited areas of Cameroon. The languages spoken belong to three different linguistic families [Afro-Asiatic (AA), Nilo-Saharan (NS) and Niger-Kordofanian (NK)]. The analysis of variation of allele frequencies indicates that the level of genetic interpopulation differentiation is rather low (F(st) = 0.011 +/- 0.006) but statistically significant (p < 0.001). This result is not unexpected because of the relatively small geographic area covered by our survey. This value is also significantly lower than the one estimated for other groups of African populations. Among the factors responsible for this, we discuss the possible role of gene flow. There is a considerable genetic differentiation among the AA populations of north Cameroon as is to be expected because they all originated from the first agriculturists of the farming "savanna complex." The Podowko and Uldeme are considerably different from all the other AA groups, probably due to the combined effect of genetic drift and isolation. In the case of the Wandala and Massa, our analyses suggest that genetic admixture with allogeneous groups (especially with the Kanuri) played an important role in determining their genetic differentiation from other AA speaking groups. The Bantu speaking populations (Bakaka, Bamileke Bassa and Ewondo, NK family, Benué Congo subfamily) settled in western and southern Cameroon are more tightly clustered than AA speaking groups. This result shows that the linguistic affinity among these four populations coincides with a substantial genetic similarity despite their different origin. Finally, the Fulbe are genetically distinct from all the populations that belong to their same linguistic phylum (NK), and closer to the neighboring Fali and Tupuri, eastern Adamawa speaking groups of north Cameroon.

show abstract

Section: Data Analysesmentioning

confidence: 89%

The peopling of Sub-Saharan Africa: The case study of Cameroon

Spedini

Destro-Bisol

Mondovì

et al. 1999

Am. J. Phys. Anthropol.

View full text Add to dashboard Cite

show abstract

“…Some of these processes may be implicit in the patterns of population structure, and the R-matrix analysis, particularly the regression of mean heterozygosity/phenotypic variance on the distance of populations from the centroid (Harpending and Ward 1982;Relethford and Blangero 1990), is supposed to offer useful insights in this regard. The above proponents of the model and many other later investigators (Devor et al 1984;Relethford 1985;Jantz and Meadows 1995;Puppala and Crawford 1996;Reddy and Chopra 1999;Reddy et al 2000) found encouraging results in their application of the model to several case studies involving local populations.…”

Section: Discussionmentioning

confidence: 91%

Population Substructure and Patterns of Quantitative Variation among the Gollas of Southern Andhra Pradesh, India

Reddy¹,

Pfeffer²,

Crawford³

et al. 2001

Human Biology

View full text Add to dashboard Cite

Population substructure and biological differentiation was studied among the Golla, a pastoral caste living in the southern areas of Andhra Pradesh (AP) in India, using 11 anthropometric measurements and 20 quantitative dermatoglyphic variables. The data were collected from a sample of 334 adult males drawn from 30 villages distributed in the Chittoor district of AP, who belonged to 8 endogamous subunits of the same caste. Multiple discriminant analysis of the anthropometrics suggests a highly significant degree of discrimination that is consistent with the microgeographic variations of the groups. In contrast, in different sets of dermatoglyphs discrimination is low and generally inconsistent with both the geographic and ethnohistorical affiliations of the groups. These findings are reflected in the F ST value for anthropometry, which is more than double the value of dermatoglyphs. The patterns of gene flow as inferred through the regression of phenotypic variance on the distance of groups from the centroid is not generally consistent with the known backgrounds in the case of either dermatoglyphs or anthropometry. It is concluded that at the level of caste substructure representing the lowest level of population hierarchy, the quantitative variables examined here may not portray a complete picture of the historical process of subdivision. The results of this study are not in congruence with those based on another study of 13 short tandem repeat loci on the same set of populations (Reddy et al. 2001), which may provide better insights into the population structure and history of subdivision that are consistent with the known ethnohistorical backgrounds of the populations.India offers immense scope and a variety of situations to study the processes of population subdivision and their microevolutionary significance. India's population structure is remarkable in that the population is divided into a large number of strictly defined endogamous castes, tribes, and religious groups. However, most unique and fundamental to the Indian population structure is the existence

show abstract

“…Table 6 presents results for Brac that bear on genetic-linguistic-geo aphic corresponenetics and linguistics would covary ? Relethford, 1985) and 2) since geography has been shown to influence genetic structure (Jorde, 1980), both genetic distances and linguistic distances would correlate positively with geographic distance. Only the linguistics-geogra hy relationship turned correlation (r = 0.4286) is highly significant, whereas neither the genetics-linguistics (r = 0.0581) nor the genetics-geography correlation (r = -0.1732) is statistically significant (Table 6).…”

Section: G E N E T I C D I S T a N C E ( G E N E Substitutions) Dolmentioning

confidence: 94%

Genetics, ethnohistory, and linguistics of Brač, Yugoslavia

Zegura

Janičijević

Sujoldžić

et al. 1991

American J Hum Biol

View full text Add to dashboard Cite

Serogenetic data involving 21 genetic systems were collected from 12 villages on the island of Brač (Yugoslavia) in 1987. Maximum sample size was 709 individuals. The UPGMA dendrogram based on genetic distances was readily interpretable within the contexts of village settlement history, social relationships, and sample size considerations. The gene diversity value (H = 0.3029 ± 0.0119) was both quite high and extremely similar to the average heterozygosity value on the neighboring Pelješac peninsula. Quadratic assignment procedures were used to investigate genetic-linguistic-geographic correspondences. Unlike the Pelješac peninsula, where the distance matrix correlations between genetics and linguistics, genetics and geography, and linguistics and geography were all positive and highly statistically significant; on Brač, only the linguistics-geography correlation achieved statistical significance. Reasons for the differences are sought in the different migrational characteristics of these two population systems, in the complex interaction between evolutionary forces promoting population differentiation (genetic drift) and homogeneity (gene flow), and in known patterns of sociocultural interaction that might have skewed the genetic-geographic associations on Brač.

show abstract

Isolation by distance, linguistic similarity, and the genetic structure on Bougainville Island

Cited by 21 publications

References 24 publications

The peopling of Sub-Saharan Africa: The case study of Cameroon

The peopling of Sub-Saharan Africa: The case study of Cameroon

Population Substructure and Patterns of Quantitative Variation among the Gollas of Southern Andhra Pradesh, India

Genetics, ethnohistory, and linguistics of Brač, Yugoslavia

Contact Info

Product

Resources

About