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Linkage Disequilibrium and Persistence of Phase in Holstein–Friesian, Jersey and Angus Cattle

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de Roos, A P W, Hayes, B J, Spelman, R J, Goddard, M E·2008·Genetics

Abstract

When a genetic marker and a quantitative trait locus (QTL) are in linkage disequilibrium (LD) in one population, they may not be in LD in another population or their LD phase may be reversed. The objectives of this study were to compare the extent of LD and the persistence of LD phase across multiple cattle populations. LD measures r and r2 were calculated for syntenic marker pairs using genomewide single-nucleotide polymorphisms (SNP) that were genotyped in Dutch and Australian Holstein–Friesian (HF) bulls, Australian Angus cattle, and New Zealand Friesian and Jersey cows. Average r2 was ∼0.35, 0.25, 0.22, 0.14, and 0.06 at marker distances 10, 20, 40, 100, and 1000 kb, respectively, which indicates that genomic selection within cattle breeds with r2 ≥ 0.20 between adjacent markers would require ∼50,000 SNPs. The correlation of r values between populations for the same marker pairs was close to 1 for pairs of very close markers (<10 kb) and decreased with increasing marker distance and the extent of divergence between the populations. To find markers that are in LD with QTL across diverged breeds, such as HF, Jersey, and Angus, would require ∼300,000 markers.

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Metadata

Authors
de Roos, A. P. W., Hayes, B. J., Spelman, R. J., & Goddard, M. E.
Venue
Genetics
Published
2008-07-01
Volume
179
Issue
3
Pages
1503-1512
ISSN
  • 0016-6731 (ISSN-L)
  • 1943-2631
OpenAlex
W2097840595
Cited by
498
References
34
FWCI
15.47
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Linkage Disequilibrium and Persistence of Phase in Holstein–Friesian, Jersey and Angus Cattle. https://app.cochat.ai/papers/10.1534/genetics.107.084301
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de Roos, A. P. W., Hayes, B. J., Spelman, R. J., & Goddard, M. E. (2008). Linkage Disequilibrium and Persistence of Phase in Holstein–Friesian, Jersey and Angus Cattle. Genetics. https://doi.org/10.1534/genetics.107.084301

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