Fig. 1

Association study plots for milk β-LG content. Plot of -log₁₀(P-values) on the y-axis for the association of 9,053 SNPs located on the tail part of the Bos taurus autosome 11, positions based on Btau 4.2 (x-axis), with un-adjusted milk β-LG content (a). Three -log₁₀(P-values) estimated as infinite were set equal to a value of 350. The colour gradient represents the LD (r²) between the Q-Tag SNP and the other SNPs. Plots of -log₁₀(P-values) for the association of 2,584 SNPs located in the region of interest (underlined in grey a) with milk β-LG content adjusted for the genotype of Q-Tag SNP₁ (b), and Q-Tag SNP₂ (c), and Q-Tag SNP₃ (d), and Q-Tag SNP₄ (e)