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Breed means, bases, heterosis and inbreeding regressions


August 2021 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 -5875 -193 -166 -3.5 0.05 1.7 -9.0 0.2 2.3
Brown Swiss -4699 -130 -98 -3.7 0.18 -1.9 -9.9 -6.2 -0.6
Guernsey -6762 -132 -177 -9.0 0.36 -0.3 -11.6 -7.7 -12.5
Jersey -5561 -58 -96 2.0 0.37 3.9 -0.5 2.9 1.2
Milking Shorthorn -6500 -255 -202 -3.4 0.27 3.4 -3.0 1.4 3.9

 

PTA differences from Holstein

Breed Milk Fat Protein Productive
Life
Somatic
Cell
Score
Daughter
Pregnancy
Rate
Heifer
Conception
Rate
Cow
Conception
Rate
Livability
Ayrshire -2937 -96 -83 -1.8 0.03 0.8 -4.5 0.1 1.1
Brown Swiss -2350 -65 -49 -1.8 0.09 -0.9 -5.0 -3.1 -0.3
Guernsey -3381 -66 -89 -4.5 0.18 -0.1 -5.8 -3.8 -6.3
Jersey -2780 -29 -48 1.0 0.18 1.9 -0.3 1.4 0.6
Milking Shorthorn -3250 -128 -101 -1.7 0.14 1.7 -1.5 0.7 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 0.92 1.00 1.06 1.00 1.00 1.00 1.00
Brown Swiss 0.89 0.89 0.89 1.00 1.02 1.00 1.00 1.00 1.00
Guernsey 0.94 0.94 0.94 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 0.98 0.98 0.98 1.00 0.88 1.00 1.00 1.00 1.00
Milking Shorthorn 0.75 0.75 0.75 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 19250 769 613 25.8 2.51 26.6 44.8 40.7 88.4
Brown Swiss 23056 943 774 25.2 2.51 24.5 45.9 30.7 83.3
Guernsey 17607 807 585 25.0 3.01 23.5 40.8 29.4 74.3
Holstein 28071 1077 871 26.4 2.31 31.2 55.4 38.6 85.7
Jersey 21271 1030 780 27.8 2.90 34.4 49.6 39.2 84.7
Milking Shorthorn 19114 730 597 26.3 2.88 28.6 51.8 41.8 85.1



Initial 1960 heterosis value

Milk Fat Protein Productive
Life
Somatic
Cell
Score
Daughter
Pregnancy
Rate
Heifer
Conception
Rate
Cow
Conception
Rate
Livability
-35 20 8 0.96 0.03 1.99 1.14 1.94 0.02



Regression per 1% inbreeding

Milk Fat Protein Productive
Life
Somatic
Cell
Score
Daughter
Pregnancy
Rate
Heifer
Conception
Rate
Cow
Conception
Rate
Livability
-66.2 -2.48 -1.97 -0.27 0.01 -0.19 -0.19 -0.25 -0.09



Base Cow Expected Future Inbreeding (EFI)

Breed EFI
Ayrshire 6.9
Brown Swiss 7.3
Guernsey 7.8
Holstein 7.3
Jersey 7.9
Milking Shorthorn 4.5