Additional file 5: Figures S5 and S6. of No evidence of prenatal diversifying selection at locus or supertype levels in the dog MHC class II loci

Biplots of the first two PCs in supertype clusters of DLA-DRB1 (Figure S5) and DLA-DQB1 loci (Figure S6). The biplots were done using the ggbiplot function in R. Ellipses show Normal contour lines with 68% probability for each cluster. (ZIP 20Â kb)针对DLA-DRB1基因座（图S5）与DLA-DQB1基因座（图S6）的超型聚类，绘制了其前两个主成分（Principal Component, PC）的双标图（biplot）。所有双标图均通过R语言中的ggbiplot函数生成。图中椭圆代表各聚类对应68%置信水平的正态分布等高线。（ZIP 压缩包，大小：20 KB）