Relationship between estimates of family-level inbreeding depression from selfing (FID_k(self)) and open pollination (FID_k(op)) from common parents at ages 4 (A) and 6 (B) years from planting. Pearson correlation coefficients between FID_k(self) and FID_k(op) were 0.67 at age 4, and 0.75 at age 6, being both statistically significant (P ≤ 0.001).