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Breed means, bases, heterosis and inbreeding regressions

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August 2022 across breed base adjustment parameters
Breeding value (2*PTA) differences from Holstein

Breed Milk Fat Protein Productive
Life
Somatic
Cell
Score
Daughter
Pregnancy
Rate
Heifer
Conception
Rate
Cow
Conception
Rate
Livability
Ayrshire -6019 -189 -161 -2.9 0.04 1.9 -8.9 0.5 2.2
Brown Swiss -4945 -129 -95 -3.3 0.17 -1.7 -9.8 -6.0 -0.6
Guernsey -7063 -130 -175 -8.5 0.35 0.0 -11.6 -7.4 -12.2
Jersey -5713 -55 -90 2.0 0.34 4.0 -0.3 3.3 1.4
Milking Shorthorn -6697 -250 -197 -2.8 0.26 3.7 -2.9 1.8 4.1

 

PTA differences from Holstein

Breed Milk Fat Protein Productive
Life
Somatic
Cell
Score
Daughter
Pregnancy
Rate
Heifer
Conception
Rate
Cow
Conception
Rate
Livability
Ayrshire -3009 -95 -80 -1.5 0.02 0.9 -4.4 0.2 1.1
Brown Swiss -2472 -64 -47 -1.6 0.08 -0.9 -4.9 -3.0 -0.3
Guernsey -3532 -65 -87 -4.2 0.17 0.0 -5.8 -3.7 -6.1
Jersey -2857 -28 -45 1.0 0.17 2.0 -0.1 1.7 0.7
Milking Shorthorn -3348 -125 -98 -1.4 0.13 1.9 -1.5 0.9 2.0

 

Standard deviation ratio

Breed Milk Fat Protein Productive
Life
Somatic
Cell
Score
Daughter
Pregnancy
Rate
Heifer
Conception
Rate
Cow
Conception
Rate
Livability
Ayrshire 0.92 0.92 0.96 1.00 1.06 1.00 1.00 1.00 1.00
Brown Swiss 0.81 0.90 0.93 1.00 1.02 1.00 1.00 1.00 1.00
Guernsey 0.86 0.94 0.93 1.00 1.13 1.00 1.00 1.00 1.00
Holstein 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
Jersey 0.87 0.97 1.00 1.00 0.88 1.00 1.00 1.00 1.00
Milking Shorthorn 0.72 0.75 0.73 1.00 1.16 1.00 1.00 1.00 1.00

 

Trait means for base cows

Breed Milk Fat Protein Productive
Life
Somatic
Cell
Score
Daughter
Pregnancy
Rate
Heifer
Conception
Rate
Cow
Conception
Rate
Livability
Ayrshire 19206 770 613 25.9 2.51 26.6 44.9 41.0 88.4
Brown Swiss 23022 943 774 24.9 2.51 24.5 46.0 30.7 83.3
Guernsey 17568 809 585 25.0 3.01 23.4 40.8 29.5 73.9
Holstein 28014 1077 870 25.9 2.31 31.2 55.4 38.7 85.7
Jersey 21268 1030 780 27.3 2.90 34.4 49.6 39.2 84.7
Milking Shorthorn 19127 730 597 26.0 2.90 28.5 51.9 41.5 84.8



Initial 1960 heterosis value

Milk Fat Protein Productive
Life
Somatic
Cell
Score
Daughter
Pregnancy
Rate
Heifer
Conception
Rate
Cow
Conception
Rate
Livability
-207 14 2 0.16 0.04 1.48 0.32 1.21 0.02



Regression per 1% inbreeding

Milk Fat Protein Productive
Life
Somatic
Cell
Score
Daughter
Pregnancy
Rate
Heifer
Conception
Rate
Cow
Conception
Rate
Livability
-72.6 -2.66 -2.08 -0.28 0.01 -0.21 -0.21 -0.29 -0.10



Base Cow Expected Future Inbreeding (EFI)

Breed EFI
Ayrshire 7.0
Brown Swiss 7.2
Guernsey 7.9
Holstein 7.3
Jersey 7.9
Milking Shorthorn 4.5