Heritability Estimates Used for Genetic Evaluation in Canada
- March 30, 2021
| Production Trait | HO | AY | JE | BS | GU | CN | MS |
| Milk Yield | 28 | 32 | 33 | 28 | 31 | 31 | 31 |
| Fat Yield | 26 | 26 | 27 | 22 | 25 | 25 | 25 |
| Protein Yield | 26 | 29 | 29 | 25 | 28 | 28 | 28 |
| Fat Percentage | Not Directly Used – Literature estimate is ~50% | ||||||
| Protein Percentage | Not Directly Used – Literature estimate is ~50% | ||||||
| Functional Traits | HO | AY | JE | BS | GU | CN | MS |
| Feed Efficiency | 5 | Not evaluated | |||||
| Herd Life | 10 | ||||||
| Mastitis Resistance | 12 | 12 | 12 | Not evaluated | |||
| Metabolic Disease Resistance | 7 | 7 | 7 | Not evaluated | |||
| Hoof Health | 9 | Not evaluated | |||||
| Lactation Persistency | 20 | 23 | 21 | 17 | 21 | 21 | 21 |
| Somatic Cell Score | 18 | 16 | 18 | 19 | 18 | 18 | 18 |
| Daughter Fertility | 4 | 7 | 3 | 4 | |||
| Milking Speed | 14 | ||||||
| Milking Temperament | 13 | ||||||
| Calving Ability | 3 | 4 | 2 | 3 | |||
| Daughter Calving Ability | 7 | 6 | 9 | 7 | |||
| Body Condition Score | 21 | 17 | 17 | 18 | |||
| Major Type Trait | HO | AY | JE | BS | GU | CN | MS |
| Conformation (Final Score) | 20 | 22 | 18 | 20 | |||
| Mammary System | 24 | 18 | 18 | 18 | |||
| Feed & Legs | 13 | 18 | 10 | 14 | |||
| Dairy Strength | 23 | 28 | 17 | 23 | |||
| Rump | 26 | 15 | 13 | 14 | |||
| Descriptive Type Trait |
HO |
AY |
JE |
SB |
GU |
CN |
SL |
| Udder Floor | 21 | 18 | 13 | 15 | |||
| Udder Depth | 44 | 36 | 42 | 39 | |||
| Udder Texture | 12 | 16 | 11 | 13 | |||
| Median Suspensory | 17 | 19 | 17 | 18 | |||
| Fore Attachment | 27 | 24 | 25 | 24 | |||
| Fore Teat Placement | 27 | 24 | 24 | 24 | |||
| Rear Attachment Height | 25 | 25 | 24 | 24 | |||
| Rear Attachment Width | 18 | 20 | 19 | 19 | |||
| Rear Teat Placement | 29 | 27 | 28 | 27 | |||
| Teat Length | 32 | 31 | 25 | 28 | |||
| Foot Angle | 7 | 7 | 8 | 8 | |||
| Heel Depth | 8 | 9 | 7 | 8 | |||
| Bone Quality | 26 | 34 | 18 | 26 | |||
| Rear Legs Side View | 20 | 19 | 14 | 17 | |||
| Rear Legs Rear View | 11 | 16 | 9 | 12 | |||
| Front Leg View | 11 | 7 | 10 | 8 | |||
| Locomotion | 5 | 8 | ‐ | 5 | |||
| Stature | 46 | 47 | 30 | 39 | |||
| Height at Front End | 23 | 17 | 18 | 18 | |||
| Chest Width | 20 | 16 | 14 | 15 | |||
| Body Depth | 31 | 30 | 25 | 28 | |||
| Dairy Capacity | 18 | 18 | 13 | 16 | |||
| Loin Strength | 19 | 16 | 18 | 17 | |||
| Rump Angle | 41 | 33 | 31 | 32 | |||
| Pin Width | 32 | 33 | 19 | 26 | |||
| Thurl Placement | 23 | 17 | 15 | 16 | |||
