Cited by 76Genetic and phenotypic traits in livestockGenetic Mapping and Diversity in Plants and AnimalsAnimal Behavior and Reproduction

The genetic architecture of domestication in the chicken: effects of pleiotropy and linkage

WRIGHT, D., RUBIN, C.‐J., MARTINEZ BARRIO, A., SCHÜTZ, K., KERJE, S., BRÄNDSTRÖM, H., KINDMARK, A., JENSEN, P. +1 more·2010·Molecular Ecology

Abstract

The extent of pleiotropy and epistasis in quantitative traits remains equivocal. In the case of pleiotropy, multiple quantitative trait loci are often taken to be pleiotropic if their confidence intervals overlap, without formal statistical tests being used to ascertain if these overlapping loci are statistically significantly pleiotropic. Additionally, the degree to which the genetic correlations between phenotypic traits are reflected in these pleiotropic quantitative trait loci is often variable, especially in the case of antagonistic pleiotropy. Similarly, the extent of epistasis in various morphological, behavioural and life-history traits is also debated, with a general problem being the sample sizes required to detect such effects. Domestication involves a large number of trade-offs, which are reflected in numerous behavioural, morphological and life-history traits which have evolved as a consequence of adaptation to selective pressures exerted by humans and captivity. The comparison between wild and domestic animals allows the genetic analysis of the traits that differ between these population types, as well as being a general model of evolution. Using a large F(2) intercross between wild and domesticated chickens, in combination with a dense SNP and microsatellite marker map, both pleiotropy and epistasis were analysed. The majority of traits were found to segregate in 11 tight 'blocks' and reflected the trade-offs associated with domestication. These blocks were shown to have a pleiotropic 'core' surrounded by more loosely linked loci. In contrast, epistatic interactions were almost entirely absent, with only six pairs identified over all traits analysed. These results give insights both into the extent of such blocks in evolution and the development of domestication itself.

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Crossref · 10.1111/j.1365-294x.2010.04882.x

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  • The long LD block brought a challenge to refining the causal loci of white plumage but provided an opportunity to investigate pleiotropy and linkage involved in breeding.

    “The long LD block in the genomes brought challenge to refining the casual loci of white plumage, but provided an opportunity to investigate the pleiotropy and linkage involved in the breeding (Wright et al. 2010).”

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Authors
WRIGHT, D., RUBIN, C. ‐., MARTINEZ BARRIO, A., SCHÜTZ, K., KERJE, S., BRÄNDSTRÖM, H., KINDMARK, A., JENSEN, P., & ANDERSSON, L.
Affiliations
  • Linköping University (SE)
  • Uppsala University (SE)
  • Swedish University of Agricultural Sciences (SE)
  • Uppsala University Hospital (SE)
Corresponding author
WRIGHT, D.
Venue
Molecular Ecology
Publisher
Wiley
Published
2010-10-29
Volume
19
Issue
23
Pages
5140-5156
ISSN
  • 0962-1083 (ISSN-L)
  • 1365-294X
OpenAlex
W2135126969
Cited by
76
References
97
Citations by year
2026: 1 · 2025: 6 · 2024: 4 · 2023: 3 · 2022: 6 · 2021: 3 · 2020: 2 · 2019: 5 · 2018: 10 · 2017: 4 · 2016: 2 · 2015: 9 · 2014: 3 · 2013: 8 · 2012: 6
FWCI
3.23
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular Ecology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Svenska Forskningsrådet Formas
  • Sveriges Lantbruksuniversitet
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and phenotypic traits in livestock
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Mapping and Diversity in Plants and Animals
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Animal Behavior and Reproduction
Keywords
chicken domestication, pleiotropy, epistasis, quantitative trait loci, linkage, antagonistic pleiotropy, genetic architecture, F2 intercross, life-history traits, morphological characters, behavioral characteristics, genetic correlation
MeSH terms
Animals, Chickens, Crosses, Genetic, Epistasis, Genetic, Genotype, Genetic Linkage, Sequence Analysis, DNA, Microsatellite Repeats, Evolution, Molecular, Polymorphism, Single Nucleotide, Quantitative Trait Loci, Genetic Pleiotropy

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