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Table 4 Effect of an increase in the ancestral history coefficient (\(\varvec{AHC}\)) on all traits, when a model with only the \(\varvec{AHC}\) or with the \(\varvec{AHC}\) and pedigree-based inbreeding (\(\varvec{F}_{{\varvec{PED}}}\)) was used

From: Inbreeding depression due to recent and ancient inbreeding in Dutch Holstein–Friesian dairy cattle

Trait Model with only \(\varvec{AHC}\) Model with \(\varvec{AHC}\) and \(\varvec{F}_{{\varvec{PED}}}\)
\(\varvec{AHC}\) \(\varvec{AHC}\) \(\varvec{F}_{{\varvec{PED}}}\)
Estimate SE Estimate SE Estimate SE
MY 157.1 306.5 403.7 307.0 − 38.3** 3.7
FY 9.4 11.1 20.2 11.1 − 1.6** 0.14
PY 24.5** 9.2 34.1** 9.2 − 1.31** 0.11
CI 11.5 14.7 7.0 14.9 0.44 0.23
ICF 6.8 6.1 5.3 6.2 0.15 0.09
IFL − 11.2 11.8 − 12.9 12.0 0.17 0.19
CR 3.5 7.2 7.0 7.4 − 0.34** 0.12
SCS150 − 25.3 29.9 − 31.4 30.2 0.64 0.44
SCS400 − 3.2 30.0 − 11.4 30.3 0.88* 0.43
  1. MY: 305-day milk yield (kg); FY: 305-day fat yield (kg); PY: 305-day protein yield (kg); CI: calving interval (days); ICF: interval calving to first insemination (days); IFL: interval first to last insemination (days); CR: conception rate (%); SCS150 somatic cell score day 5 to 150 (1000 + 100*[log2 of cells/mL]); SCS400: somatic cell score day 151 to 400 (1000 + 100*[log2 of cells/mL])
  2. Significance for non-nullity is indicated by stars (*P < 0.05; **P < 0.01)