Autumn Calving Index £ACI

£ACI is an across-breed genetic ranking index designed for UK autumn block calving herds.

The index is an initial screening tool to identify bulls that meet a specific criteria. 

Use our Herd Genetic Report to identify traits to improve in your herd through breeding.

£ACI value represents the additional profit a high £ACI bull is expected to return from each of its milking daughters over her lifetime compared to an average bull of £0 ACI. 

The index has been calculated on its own base and for a specific farming system; so comparison of bulls on the £PLI or £SCI list is not possible.

Download the £ACI factsheet Search for a bull by name or herdbook number Lists of available bulls ranked by £ACI

Why choose £ACI?

  • Promotes milk quality with more weight on volume than the £SCI
  • Places strong emphasis on fertility
  • Selects for reduced maintenance costs
  • Improves udder and leg health
  • Places a strong emphasis on longevity
  • Promotes easier calving
  • Protects functional type - feet & legs and mammary 

Relative weighting of traits within £ACI

Four simple steps when selecting the right bulls for your breeding programme:

  1. Select bulls with a higher £ACI value than your best cow
  2. Select fitness traits to maintain your strengths and address herd weaknesses (Fertility, Lifespan, etc.)
  3. Match type to suit your herd
  4. Selected calving ease for maiden heifers