Table 2 Variance components, proportion of variances over total phenotypic variance and heritabilities for calving interval (CI), milk, fat and protein yields in Holstein and Jersey cows

Holstein

A

σ ² _a

58 (12)

239,580 (15,500)

257 (20)

145 (12)

σ ² _perm

43 (18)

150,320 (10,569)

255 (16)

171 (10)

σ ² _e

2681 (28)

546,590 (6487)

889 (11)

522 (6)

h ² _a

0.021 (0.004)

0.256 (0.014)

0.184 (0.013)

0.174 (0.013)

(σ ² _a  + σ ² _perm )/σ ² _p

0.036 (0.006)

0.416 (0.009)

0.366 (0.009)

0.378 (0.009)

A + D

σ ² _a

58 (12)

239,810 (15,486)

257 (20)

145 (12)

σ ² _d

34 (22)

30,492 (12,464)

54 (20)

27 (12)

σ ² _perm

8 (29)

118,360 (16,161)

200 (25)

143 (15)

σ ² _e

2680 (28)

546,520 (6486)

889 (11)

522 (6)

h ² _a

0.021 (0.004)

0.256 (0.014)

0.184 (0.013)

0.174 (0.013)

h ² _d

0.012 (0.008)

0.033 (0.013)

0.038 (0.014)

0.032 (0.014)

σ ² _d /(σ ² _a  + σ ² _d )

0.366

0.113

0.173

0.155

(σ ² _a  + σ ² _d  + σ ² _perm )/σ ² _p

0.036 (0.006)

0.416 (0.009)

0.365 (0.009)

0.377 (0.009)

Jersey

A

σ ² _a

63 (20)

137,410 (11,868)

189 (21)

106 (11)

σ ² _perm

114 (31)

98,832 (7852)

223 (17)

131 (9)

σ ² _e

2749 (43)

214,400 (3720)

606 (10)

281 (5)

h ² _a

0.022 (0.007)

0.305 (0.022)

0.186 (0.019)

0.204 (0.020)

(σ ² _a  + σ ² _perm )/σ ² _p

0.061 (0.009)

0.524 (0.011)

0.405 (0.012)

0.457 (0.012)

A + D

σ ² _a

63 (20)

137,800 (11,858)

189 (21)

105 (11)

σ ² _d

0

23,089 (8892)

67 (21)

37 (11)

σ ² _perm

114 (31)

74,510 (11,473)

153 (26)

93 (14)

σ ² _e

2749 (43)

214,450 (3721)

606 (10)

281 (5)

h ² _a

0.022 (0.007)

0.306 (0.022)

0.186 (0.019)

0.204 (0.020)

h ² _d

0

0.051 (0.020)

0.066 (0.020)

0.071 (0.021)

σ ² _d /(σ ² _a  + σ ² _d )

0

0.144

0.263

0.258

(σ ² _a  + σ ² _d  + σ ² _perm )/σ ² _p

0.061 (0.009)

0.523 (0.011)

0.403 (0.012)

0.455 (0.012)