Abstract
This chapter examines with four unlinked loci the extent of divergence between two linguistically related Baining groups in New Britain. Although they are linguistically related and are less than 100 km apart, they are, by a number of measures, surprisingly different genetically. This difference is explained in terms of male and female demographic distinctions. Early comparisons in global and regional mtDNA and NRY diversity indicate comparatively greater overall mtDNA variability, but greater among-group NRY variation. The chapter suggests that the key factor is the larger effective population size of women (since relatively few men contribute to following generations). This distinction could cause an acceleration in the effects of genetic drift, leading to less overall variation, but proportionately more among-group variation. In the Baining study, evidence is found for a much smaller male effective population size. However, the proportion of males who migrate and successfully reproduce appears to be greater than for females. In considering the surprising degree of overall differentiation between these two Baining groups, the effects of drift are paramount, but there remains the question of whether the differences may be due to the residue of ancient lineage sorting.
| Original language | English (US) |
|---|---|
| Title of host publication | Population Genetics, Linguistics, and Culture History in the Southwest Pacific |
| Publisher | Oxford University Press |
| ISBN (Print) | 9780199790142, 9780195300307 |
| DOIs | |
| State | Published - Sep 1 2007 |
| Externally published | Yes |
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Keywords
- Baining
- Demography
- Effective population size
- Genetic drift
- Lineage sorting
- Migration rates
- Mitochondrial DNA
- Y chromosome
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
Cite this
Extraordinary Population Structure among the Baining of New Britain. / Wilder, Jason A; Hammer, Michael F.
Population Genetics, Linguistics, and Culture History in the Southwest Pacific. Oxford University Press, 2007.Research output: Chapter in Book/Report/Conference proceeding › Chapter
}
TY - CHAP
T1 - Extraordinary Population Structure among the Baining of New Britain
AU - Wilder, Jason A
AU - Hammer, Michael F.
PY - 2007/9/1
Y1 - 2007/9/1
N2 - This chapter examines with four unlinked loci the extent of divergence between two linguistically related Baining groups in New Britain. Although they are linguistically related and are less than 100 km apart, they are, by a number of measures, surprisingly different genetically. This difference is explained in terms of male and female demographic distinctions. Early comparisons in global and regional mtDNA and NRY diversity indicate comparatively greater overall mtDNA variability, but greater among-group NRY variation. The chapter suggests that the key factor is the larger effective population size of women (since relatively few men contribute to following generations). This distinction could cause an acceleration in the effects of genetic drift, leading to less overall variation, but proportionately more among-group variation. In the Baining study, evidence is found for a much smaller male effective population size. However, the proportion of males who migrate and successfully reproduce appears to be greater than for females. In considering the surprising degree of overall differentiation between these two Baining groups, the effects of drift are paramount, but there remains the question of whether the differences may be due to the residue of ancient lineage sorting.
AB - This chapter examines with four unlinked loci the extent of divergence between two linguistically related Baining groups in New Britain. Although they are linguistically related and are less than 100 km apart, they are, by a number of measures, surprisingly different genetically. This difference is explained in terms of male and female demographic distinctions. Early comparisons in global and regional mtDNA and NRY diversity indicate comparatively greater overall mtDNA variability, but greater among-group NRY variation. The chapter suggests that the key factor is the larger effective population size of women (since relatively few men contribute to following generations). This distinction could cause an acceleration in the effects of genetic drift, leading to less overall variation, but proportionately more among-group variation. In the Baining study, evidence is found for a much smaller male effective population size. However, the proportion of males who migrate and successfully reproduce appears to be greater than for females. In considering the surprising degree of overall differentiation between these two Baining groups, the effects of drift are paramount, but there remains the question of whether the differences may be due to the residue of ancient lineage sorting.
KW - Baining
KW - Demography
KW - Effective population size
KW - Genetic drift
KW - Lineage sorting
KW - Migration rates
KW - Mitochondrial DNA
KW - Y chromosome
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UR - http://www.scopus.com/inward/citedby.url?scp=84920752857&partnerID=8YFLogxK
U2 - 10.1093/acprof:oso/9780195300307.003.0013
DO - 10.1093/acprof:oso/9780195300307.003.0013
M3 - Chapter
AN - SCOPUS:84920752857
SN - 9780199790142
SN - 9780195300307
BT - Population Genetics, Linguistics, and Culture History in the Southwest Pacific
PB - Oxford University Press
ER -