Figure 2

Frequency distribution of the number of nematode eggs per gram of faeces (EPG) (A), as well as of the breeding value for Log ₁₀ (EPG+1) (BV _LEPG ) (B), for 4,048 Holstein-Friesian dairy cows belonging to twelve paternal half-sib pedigrees (EPG: blue; BV _LEPG : red)), as well as for the daughters selected for the QTL scan (white: lower tail, black: upper tail). (C) Mean BV_LEPG ± 1.96 SE (red circle + error bars), as well as mean (circle) and range (error bars) of the upper (black) and lower (white) tails for each of the twelve daughter group. The number of daughters before selection is shown for each sire.