Heritabilities of genetic traits evaluated by AHDB Dairy

A shortened list of genetic trait heritabilites are below.  A complete list, including linear type traits, can be found in AHDB Dairy's Breeding Briefs.

Trait

Heritability

Production

Milk yield

55% (0.5)

Fat yield

47% (0.47)

Protein yield

51% (0.51)

Fat percentage

68% (0.68)

Protein percentage

68% (0.68)

Management

Somatic cell count

11% (0.11)

Mastitis

4% (0.04)

Locomotion

10% (0.10)

Lameness Advantage

9% (0.09)

Lifespan

6% (0.06)

Calf Survival

5% (0.05)

Fertility

3% (0.03)

Temperament

11% (0.11)

Ease of milking

21% (0.21)

Body Condition Score

27% (0.27)

Direct Calving Ease

7% (0.07)

Maternal Calving Ease

4% (0.04)

TB Advantage

8% (0.08)

Dairy Carcase Index

40% (0.4)

Composite type

Legs and feet

16% (0.16)

Mammary

27% (0.27)

Type merit/Type score

32% (0.32)