a positive trendp < 0.001
For F PED , the observed and unexpected positive change is likely caused by the systematic increase in pedigree depth as records expand over time, providing more accurate inbreeding measurements in post‐rescue cohorts, evidenced by greater CGE for the post‐rescue group and a positive trend between CGE and F PED ( t ‐test: mean before = 2.58, mean after = 3.03, t = −4.28, 95% CI: −0.649 to −0.240, p < 0.001, n = 364; beta‐regression model: β = 0.858 ± 0.0701 SE, z = 12.3 p < 0.001, n = 327; Figure 5 ). 4.