Fig. 1.

Interaction analysis for significantly associated markers with C18:1 (a) and C18:2 (b) rates. Increasing intensity of green color corresponds to an increasing level of interaction between SNPs. The same color indicates similar levels of statistical significance between SNP cases. P-values for the interaction (epistasis) log-likelihood ratio test are found in the upper triangle of the matrix. In contrast, those from the likelihood ratio test (LRT) compare the two-SNP additive likelihood to the best of the single-SNP models are in the lower part. P values from LRT for the crude effect of each SNP are written on the diagonal. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)