Figure 4

Second and third principal components of genomic relationships for Tropical composite cattle. For cattle from the Tropical composite breed, plots of eigenvalues for the third principal component over eigenvalues for the second principal component from a genomic correlation matrix estimated using individual genotypes (A) or genotype data from 536 (B), 268 (C) or 134 (D) pools; pools in (D) (134 pools) were colored on the basis of an ad hoc clustering, and when these pools were split to create 268 and 536 pools, or 940 individuals, pools retain the color of their "parent" pool.