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Linkage Disequilibrium and Demographic History of Wild and Domestic Canids

Open access
Gray, Melissa M, Granka, Julie M, Bustamante, Carlos D, Sutter, Nathan B, Boyko, Adam R, Zhu, Lan, Ostrander, Elaine A, Wayne, Robert K·2009·Genetics

Abstract

Assessing the extent of linkage disequilibrium (LD) in natural populations of a nonmodel species has been difficult due to the lack of available genomic markers. However, with advances in genotyping and genome sequencing, genomic characterization of natural populations has become feasible. Using sequence data and SNP genotypes, we measured LD and modeled the demographic history of wild canid populations and domestic dog breeds. In 11 gray wolf populations and one coyote population, we find that the extent of LD as measured by the distance at which r2 = 0.2 extends <10 kb in outbred populations to >1.7 Mb in populations that have experienced significant founder events and bottlenecks. This large range in the extent of LD parallels that observed in 18 dog breeds where the r2 value varies from ∼20 kb to >5 Mb. Furthermore, in modeling demographic history under a composite-likelihood framework, we find that two of five wild canid populations exhibit evidence of a historical population contraction. Five domestic dog breeds display evidence for a minor population contraction during domestication and a more severe contraction during breed formation. Only a 5% reduction in nucleotide diversity was observed as a result of domestication, whereas the loss of nucleotide diversity with breed formation averaged 35%.

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Metadata

Authors
Gray, M. M., Granka, J. M., Bustamante, C. D., Sutter, N. B., Boyko, A. R., Zhu, L., Ostrander, E. A., & Wayne, R. K.
Venue
Genetics
Published
2009-04-01
Volume
181
Issue
4
Pages
1493-1505
ISSN
  • 0016-6731 (ISSN-L)
  • 1943-2631
OpenAlex
W2087260514
Cited by
172
References
6
FWCI
8.73
Type
journal article
Language
en
Open access
bronze

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Gray, M. M., Granka, J. M., Bustamante, C. D., Sutter, N. B., Boyko, A. R., Zhu, L., Ostrander, E. A., & Wayne, R. K. (2009). Linkage Disequilibrium and Demographic History of Wild and Domestic Canids. Genetics. https://doi.org/10.1534/genetics.108.098830

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