MC1R Genotype and Plumage Colouration in the Zebra Finch (Taeniopygia guttata): Population Structure Generates Artefactual Associations

Hoffman J, Krause ET, Lehmann K, Krüger O (2014)
PLoS ONE 9(1): e86519.

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Abstract / Bemerkung
Polymorphisms at the melanocortin-1 receptor (MC1R) gene have been linked to coloration in many vertebrate species. However, the potentially confounding influence of population structure has rarely been controlled for. We explored the role of the MC1R in a model avian system by sequencing the coding region in 162 zebra finches comprising 79 wild type and 83 white individuals from five stocks. Allelic counts differed significantly between the two plumage morphs at multiple segregating sites, but these were mostly synonymous. To provide a control, the birds were genotyped at eight microsatellites and subjected to Bayesian cluster analysis, revealing two distinct groups. We therefore crossed wild type with white individuals and backcrossed the F1s with white birds. No significant associations were detected in the resulting offspring, suggesting that our original findings were a byproduct of genome-wide divergence. Our results are consistent with a previous study that found no association between MC1R polymorphism and plumage coloration in leaf warblers. They also contribute towards a growing body of evidence suggesting that care should be taken to quantify, and where necessary control for, population structure in association studies
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PLoS ONE
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9
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e86519
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Article Processing Charge funded by the Deutsche Forschungsgemeinschaft and the Open Access Publication Fund of Bielefeld University.
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Hoffman J, Krause ET, Lehmann K, Krüger O. MC1R Genotype and Plumage Colouration in the Zebra Finch (Taeniopygia guttata): Population Structure Generates Artefactual Associations. PLoS ONE. 2014;9(1):e86519.
Hoffman, J., Krause, E. T., Lehmann, K., & Krüger, O. (2014). MC1R Genotype and Plumage Colouration in the Zebra Finch (Taeniopygia guttata): Population Structure Generates Artefactual Associations. PLoS ONE, 9(1), e86519. doi:10.1371/journal.pone.0086519
Hoffman, J., Krause, E. T., Lehmann, K., and Krüger, O. (2014). MC1R Genotype and Plumage Colouration in the Zebra Finch (Taeniopygia guttata): Population Structure Generates Artefactual Associations. PLoS ONE 9, e86519.
Hoffman, J., et al., 2014. MC1R Genotype and Plumage Colouration in the Zebra Finch (Taeniopygia guttata): Population Structure Generates Artefactual Associations. PLoS ONE, 9(1), p e86519.
J. Hoffman, et al., “MC1R Genotype and Plumage Colouration in the Zebra Finch (Taeniopygia guttata): Population Structure Generates Artefactual Associations”, PLoS ONE, vol. 9, 2014, pp. e86519.
Hoffman, J., Krause, E.T., Lehmann, K., Krüger, O.: MC1R Genotype and Plumage Colouration in the Zebra Finch (Taeniopygia guttata): Population Structure Generates Artefactual Associations. PLoS ONE. 9, e86519 (2014).
Hoffman, Joseph, Krause, E. Tobias, Lehmann, Katrin, and Krüger, Oliver. “MC1R Genotype and Plumage Colouration in the Zebra Finch (Taeniopygia guttata): Population Structure Generates Artefactual Associations”. PLoS ONE 9.1 (2014): e86519.
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