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. 2014 Sep 16;15:92. doi: 10.1186/s12863-014-0092-9

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© Dodds et al.; licensee BioMed Central Ltd. 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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The first four principal components of the genomic relationship matrix. Scatterplot matrix of the first four principal components (PC1 to PC4) applied to the full dataset of 13,118 animals. Key: blue circle Romney; green square Coopworth; purple diamond Perendale; grey triangle Texel; X Other; where animals are coloured (other than grey) if more than 50% of that breed) and the symbols are filled if they are more than 90% of that breed. The proportion of variance explained by each of the components is shown on the diagonal.