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Principal component (PC) analysis of the haplotype reference panel. (a) Overlap among projects sequenced with different platforms; (b) depicts PC1 separating the Bos indicus from Bos taurus breeds, and PC2 separating Holstein from Angus, with other Bos taurus breeds intermediate between Holstein and Angus. The first two PC explained 11% of genomic relationships among the reference, 7% by PC1, and 4% by PC2.
