Table 3. Holstein and Jersey estimated variance components and heritabilities for milk, fat, and protein yields, productive life (PL), daughter pregnancy rate (DPR), somatic cell score (SCS), fat percent (fat%) and protein percent (protein%) using four different models.
Breed | Modela | Varb | Milk (kg2) | Fat (kg2) | Protein (kg2) | PL (months2) | DPR (%2) | SCS | Fat % | protein% |
HO | MA | 762,478 | 1,002 | 449 | 21.2 | 16.1 | 0.19 | 0.021 | 0.0038 | |
1,885,769 | 2,961 | 1,579 | 476.6 | 273.3 | 1.98 | 0.023 | 0.0039 | |||
0.288 | 0.253 | 0.221 | 0.043 | 0.056 | 0.087 | 0.468 | 0.492 | |||
MAD | 712,905 | 920 | 409 | 21.1 | 16.6 | 0.18 | 0.02 | 0.0038 | ||
134,815 | 200 | 108 | 0.24 | 0.001 | 0.02 | 0.0005 | 0.0001 | |||
1,788,979 | 2,824 | 1,501 | 476.4 | 274.6 | 1.96 | 0.023 | 0.0039 | |||
0.27 | 0.233 | 0.202 | 0.042 | 0.057 | 0.084 | 0.464 | 0.487 | |||
0.051 | 0.051 | 0.053 | 0 | 0 | 0.01 | 0.011 | 0.013 | |||
MAD2 | 750,379 | 985 | 437 | 20.9 | 16.1 | 0.19 | 0.021 | 0.0038 | ||
96,834 | 136 | 79 | 2.4 | 0.002 | 0.02 | 0.0003 | 0.00006 | |||
1,787,699 | 2,827 | 1,499 | 474.4 | 274.1 | 1.96 | 0.023 | 0.0039 | |||
0.285 | 0.25 | 0.217 | 0.042 | 0.056 | 0.087 | 0.468 | 0.492 | |||
0.037 | 0.034 | 0.039 | 0.005 | 0 | 0.01 | 0.006 | 0.008 | |||
MAD3 | 831,607 | 999 | 548 | – | – | – | – | – | ||
92,019 | 118 | 73 | – | – | – | – | – | |||
1,848,844 | 2,925 | 1,543 | – | – | – | – | – | |||
2,218,018 | 3,332 | 1,778 | – | – | – | – | – | |||
2,950,420 | 3,840 | 2,328 | – | – | – | – | – | |||
0.215 | 0.202 | 0.186 | – | – | – | – | – | |||
0.024 | 0.024 | 0.025 | – | – | – | – | – | |||
JE | MA | 735,064 | 869 | 552 | 36.3 | 9.3 | 0.21 | 0.045 | 0.009 | |
1,354,587 | 3,050 | 1,585 | 477.9 | 263.6 | 1.82 | 0.038 | 0.0068 | |||
0.352 | 0.222 | 0.258 | 0.071 | 0.034 | 0.102 | 0.542 | 0.567 | |||
MAD | 668,822 | 747 | 490 | 29.2 | 8.1 | 0.2 | 0.044 | 0.0088 | ||
144,809 | 279 | 149 | 19.6 | 3.2 | 0.02 | 0.0007 | 0.0005 | |||
1,262,034 | 2,871 | 1,488 | 465 | 261.5 | 1.8 | 0.037 | 0.0065 | |||
0.322 | 0.192 | 0.23 | 0.057 | 0.03 | 0.098 | 0.54 | 0.556 | |||
0.07 | 0.072 | 0.07 | 0.038 | 0.012 | 0.012 | 0.009 | 0.03 | |||
MAD2 | 713,008 | 834 | 534 | 35.8 | 9.3 | 0.21 | 0.045 | 0.0089 | ||
112,263 | 215 | 119 | 12.2 | 0.1 | 0.02 | 0.0005 | 0.0003 | |||
1,250,286 | 2,849 | 1,473 | 466.2 | 263.5 | 1.8 | 0.037 | 0.0065 | |||
0.344 | 0.214 | 0.251 | 0.07 | 0.034 | 0.102 | 0.543 | 0.567 | |||
0.054 | 0.055 | 0.056 | 0.024 | 4E-04 | 0.01 | 0.006 | 0.020 | |||
MAD3 | 827,677 | 955 | 618 | – | – | – | – | – | ||
157,350 | 306 | 161 | – | – | – | – | – | |||
1,307,028 | 2,919 | 1,537 | – | – | – | – | – | |||
1,848,349 | 3,826 | 2,051 | – | – | – | – | – | |||
2,068,021 | 3,985 | 2,217 | – | – | – | – | – | |||
0.271 | 0.182 | 0.206 | – | – | – | – | – | |||
0.052 | 0.058 | 0.054 | – | – | – | – | – |
HO = Holstein; JE = Jersey.
MA = only additive effects included; MAD = additive and dominance (values) effects included; MAD2 = additive and dominance (deviations) effects included; and MAD3 = additive and dominance effects included as well as cows with genotype probabilities derived using genotyped ancestors.
Var = variance components; = additive variance, = dominance variance, = residual variance for MAD, = residual variance for MAD2, = residual variance for genotyped cows, = residual variance for cows with genotype probabilities derived from genotyped sire and dam, = residual variance for MAD3, = additive heritability, and = dominance heritability.