Fig. 1.

Heritabilities estimated using an RNM with the A relationship matrix (left) and H relationship matrix (right) for female fertility traits: AIS (number of inseminations per conception), ICF (interval from calving to first insemination), IFL (interval from first to last insemination), and NRR (non-return rate at 56 days after first insemination). The x-axis represents the normalized herd effects with a range of mean ± 2.5 standard units. The lines with different colours show the heritabilities within different groups of heterogeneous residual variance along different EGs, and the shades represent standard errors