Fig. 2

Regression of 7 day productivity of F₁ daughters, grouped by a sire lines or b dam lines, on 7 day parental productivity detected significant paternal effects. Regression of 7 day productivity of F₁ sons, grouped by c sire lines or d dam lines, on parental 7 day productivity detected significant paternal effects. Regression of LRS productivity of F₁ daughters, grouped by e sire lines or f dam lines, on parental LRS productivity detected significant paternal and maternal effects. Dashed lines represent 95% CI