Trait Heritability Percentages 

Heritability Ranking
up to 10% = Low Heritability
20% - 30% = Medium Heritability
30% and over = High Heritability
(Low heritability means that it takes a lot of time to make genetic progress.)

% Phenotype % Milk
52
40
29
24

31
20
06
12
13
27
32
21
15
19


10
25
10
16
25
19
70
33
38
36
 Stature (height)
Upstandingness
Strength
Dairy character

Body length
Body depth
Typical head
Head strength
Shoulder tightness
Rump width
Rump angle
Rear legs
Rear leg set
Thurl height

Mammary System
Udder quality
Fore udder attachment
Fore udder length
Rear udder attachment
Rear udder height
Rear udder arch
Rear udder length
Suspensory ligament
Teat diameter
Teat placement		 39
32
25
50
06
20
40
50
62
23		 Milk yield/lactation
M.E. milk
Butterfat yield
Butterfat percentage
M.E. fat
Protein yield
SNF protein yield
Protein percentage
Milking time
Milking speed