Skip to main content

Table 2 Estimated variance components for three GREML models and nine traits, with standard errors in parentheses

From: Inbreeding depression across the genome of Dutch Holstein Friesian dairy cattle

Model Parameter Trait
MY FY PY CI ICF IFL CR SCS150 SCS400
A \({\sigma }_{P}^{2}\) 1356452 1813.04 1269.15 4215.19 717.658 3056.16 12.6991 17693.4 16336.5
\({\sigma }_{A}^{2}/{\sigma }_{P}^{2}\)(%) 41.16 (0.81) 33.34 (0.82) 30.98 (0.81) 5.02 (0.43) 6.41 (0.49) 3.13 (0.35) 2.36 (0.32) 9.26 (0.54) 12.0 (0.60)
AD \({\sigma }_{P}^{2}\) 1356134 1812.49 1268.93 4215.18 717.690 3056.15 12.6991 17693.82 16336.80
\({\sigma }_{A}^{2}/{\sigma }_{P}^{2}\)(%) 41.13 (0.81) 33.31 (0.82) 30.95 (0.81) 5.02 (0.43) 6.41 (0.49) 3.13 (0.35) 2.35 (0.32) 9.26 (0.54) 11.94 (0.60)
\({\sigma }_{D}^{2}/{\sigma }_{P}^{2}\)(%) 0.77 (0.28) 0.90 (0.31) 0.87 (0.32) 0.00 (0.38) 0.35 (0.41) 0.09 (0.39) 0.04 (0.40) 0.16 (0.35) 0.34 (0.36)
\({\sigma }_{A}^{2}/{\sigma }_{G}^{2}\)(%) 98.17 (0.66) 97.36 (0.89) 97.27 (0.99) 99.93 (7.63) 94.76 (5.78) 97.23 (11.89) 98.52 (16.45) 98.30 (3.66) 97.22 (2.87)
\({\sigma }_{D}^{2}/{\sigma }_{G}^{2}\)(%) 1.83 (0.66) 2.64 (0.89) 2.73 (0.99) 0.07 (7.63) 5.24 (5.78) 2.77 (11.89) 1.48 (16.45) 1.70 (3.66) 2.78 (2.87)
ADR \({\sigma }_{P}^{2}\) 1355963 1812.48 1268.69 4215.08 717.624 3056.15 12.6991 17693.8 16336.8
\({\sigma }_{A}^{2}/{\sigma }_{P}^{2}\)(%) 41.10 (0.81) 33.27 (0.82) 30.90 (0.81) 5.01 (0.43) 6.38 (0.49) 3.13 (0.35) 2.35 (0.32) 9.25 (0.54) 11.94 (0.60)
\({\sigma }_{D}^{2}/{\sigma }_{P}^{2}\)(%) 0.51 (0.32) 0.54 (0.32) 0.52 (0.36) 0* 0.14 (0.47) 0.09 (0.39) 0.04 (0.40) 0.14 (0.40) 0.34 (0.36)
\({\sigma }_{ROH}^{2}/{\sigma }_{P}^{2}\)(%) 0.17 (0.11) 0.25 (0.12) 0.24 (0.13) 0.07 (0.12) 0.13 (0.14) 0* 0* 0.01 (0.12) 0*
\({\sigma }_{A}^{2}/{\sigma }_{G}^{2}\)(%) 98.38 (0.68) 97.68 (0.92) 97.62 (1.02) 98.53 (2.30) 95.94 (6.11) 97.23 (11.93) 98.52 (16.76) 98.39 (3.74) 97.22 (2.87)
\({\sigma }_{D}^{2}/{\sigma }_{G}^{2}\)(%) 1.22 (0.75) 1.60 (1.01) 1.63 (1.12) 0* 2.09 (6.91) 2.77 (11.89) 1.48 (16.45) 1.46 (4.20) 2.78 (2.87)
\({\sigma }_{ROH}^{2}/{\sigma }_{G}^{2}\)(%) 0.40 (0.26) 0.72 (0.37) 0.75 (0.40) 1.47 (2.25) 1.97 (2.21) 0* 0* 0.15 (1.29) 0*
  1. Model A, additive model; AD, additive + dominance model; ADR, additive + dominance + ROH model
  2. \({\sigma }_{P}^{2}\), phenotypic variance (excluding the herd-year-season variance); \({\sigma }_{A}^{2}\), additive genetic variance; \({\sigma }_{D}^{2}\), dominance variance; \({\sigma }_{ROH}^{2}\), ROH variance; \({\sigma }_{G}^{2}\), genetic variance (\({\sigma }_{A}^{2}+{\sigma }_{D}^{2}\) for model AD, and \({\sigma }_{A}^{2}+{\sigma }_{D}^{2}+{\sigma }_{ROH}^{2}\) for model ADR)
  3. 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])
  4. *The corresponding variance component was fixed to 0 (because its initial estimate was slightly negative)
\