Figure 2
Gain from phenotypic and genomic selection. Phenotypic selection (PS, closed symbols, continuous lines), genomic selection with phenotyping prior to selection (GPS, closed symbols, dashed lines), and genomic selection (GS, open symbols, dashed lines), using ridge regression to estimate genomic breeding values. Weighted and unweighted methods were used for GS and GPS, on the right- and left-hand graphs, respectively; small and large training populations were of 200 and 1000 individuals, on the upper and lower graphs, respectively; triangles: h2 = 0.5; Circles: h2 = 0.2; to avoid cluttered graphs, simulations with h2 = 0.2 were offset to the right by four seasons; note that PS curves are identical across the four graphs; maximum standard errors observed were less than half the height of plot symbols so no error bars are given